Abstract
Motivated by recent increased interest in optimization algorithms for non-convex optimization in application to training deep neural networks and other optimization problems in data analysis, we give an overview of recent theoretical results on global performance guarantees of optimization algorithms for non-convex optimization. We start with classical arguments showing that general non-convex problems could not be solved efficiently in a reasonable time. Then we give a list of problems that can be solved efficiently to find the global minimizer by exploiting the structure of the problem as much as it is possible. Another way to deal with non-convexity is to relax the goal from finding the global minimum to finding a stationary point or a local minimum. For this setting, we first present known results for the convergence rates of deterministic first-order methods, which are then followed by a general theoretical analysis of optimal stochastic and randomized gradient schemes, and an overview of the stochastic first-order methods. After that, we discuss quite general classes of non-convex problems, such as minimization of α-weakly quasi-convex functions and functions that satisfy Polyak–Łojasiewicz condition, which still allow obtaining theoretical convergence guarantees of first-order methods. Then we consider higher-order and zeroth-order/derivative-free methods and their convergence rates for non-convex optimization problems.
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Notes
- 1.
See also this webpage with the list of references being updated https://sunju.org/research/nonconvex/.
- 2.
By ϕ(a), where \(a = (a_1,\ldots ,a_n)^\top \in {\mathbb R}^n\) is multidimensional vector, we mean vector (ϕ(a1), …, ϕ(an))⊤.
- 3.
Here \(\mathbb {E}_{\xi _k}[\cdot ]\) is a mathematical expectation conditioned on everything despite ξk, i.e., expectation is taken w.r.t. the randomness coming only from ξk.
- 4.
In the original paper [160], the authors considered more general situation when stochastic realizations f(x, ξ) have Hölder-continuous gradients.
- 5.
- 6.
For simplicity, we neglect all parameters except m and ε, see the details in Table 2.
- 7.
To distinguish exponents from superindexes, we use braces (⋅) for exponents.
- 8.
In fact, most of the results from [118] do not rely on the finite-sum structure of f.
References
N. Agarwal, Z. Allen-Zhu, B. Bullins, E. Hazan, T. Ma, Finding approximate local minima faster than gradient descent, in Proceedings of the 49th Annual ACM SIGACT Symposium on Theory of Computing, pp. 1195–1199 (2017)
K. Ahn, C. Yun, S. Sra, Sgd with shuffling: optimal rates without component convexity and large epoch requirements. Adv. Neural Inf. Process. Syst. 33 (2020)
A. Ajalloeian, S.U. Stich, Analysis of sgd with biased gradient estimators. Preprint (2020). arXiv:2008.00051
D. Alistarh, D. Grubic, J. Li, R. Tomioka, M. Vojnovic, Qsgd: Communication-efficient sgd via gradient quantization and encoding. Adv. Neural Inf. Process. Syst. 1709–1720 (2017)
Z. Allen-Zhu, Natasha: Faster non-convex stochastic optimization via strongly non-convex parameter, in International Conference on Machine Learning, pp. 89–97 (2017)
Z. Allen-Zhu, How to make the gradients small stochastically: Even faster convex and nonconvex sgd, in Advances in Neural Information Processing Systems, pp. 1157–1167 (2018)
Z. Allen-Zhu, Katyusha x: Simple momentum method for stochastic sum-of-nonconvex optimization, in International Conference on Machine Learning, pp. 179–185 (2018)
Z. Allen-Zhu, Natasha 2: Faster non-convex optimization than sgd, in Advances in Neural Information Processing Systems, pp. 2675–2686 (2018)
Z. Allen-Zhu, Y. Li, Neon2: Finding local minima via first-order oracles, in Advances in Neural Information Processing Systems, pp. 3716–3726 (2018)
Z. Allen-Zhu, Y. Li, Can sgd learn recurrent neural networks with provable generalization? in Advances in Neural Information Processing Systems, pp. 10331–10341 (2019)
Z. Allen-Zhu, Y. Li, Y. Liang, Learning and generalization in overparameterized neural networks, going beyond two layers, in Advances in Neural Information Processing Systems, pp. 6158–6169 (2019)
Z. Allen-Zhu, Y. Li, Z. Song, A convergence theory for deep learning via over-parameterization, in International Conference on Machine Learning, pp. 242–252 (PMLR, 2019)
Z. Allen-Zhu, Y. Li, Z. Song, On the convergence rate of training recurrent neural networks, in Advances in Neural Information Processing Systems, pp. 6676–6688 (2019)
A. Anandkumar, R. Ge, Efficient approaches for escaping higher order saddle points in non-convex optimization, in Conference on Learning Theory, pp. 81–102 (PMLR, 2016)
Y. Arjevani, Y. Carmon, J.C. Duchi, D.J. Foster, N. Srebro, B. Woodworth, Lower bounds for non-convex stochastic optimization. Preprint (2019). arXiv:1912.02365
Y. Arjevani, Y. Carmon, J.C. Duchi, D.J. Foster, A. Sekhari, K. Sridharan, Second-order information in non-convex stochastic optimization: Power and limitations, in Conference on Learning Theory, pp. 242–299 (2020)
S. Arora, N. Cohen, N. Golowich, W. Hu, A convergence analysis of gradient descent for deep linear neural networks. Preprint (2018). arXiv:1810.02281
F. Bach, R. Jenatton, J. Mairal, G. Obozinski, et al., Optimization with sparsity-inducing penalties. Found. Trends® Mach. Learn. 4(1), 1–106 (2012)
R. Baraniuk, M. Davenport, R. DeVore, M. Wakin, A simple proof of the restricted isometry property for random matrices. Constructive Approximation 28(3), 253–263 (2008)
A. Bazarova, A. Beznosikov, A. Gasnikov, Linearly convergent gradient-free methods for minimization of symmetric parabolic approximation. Preprint (2020). arXiv:2009.04906
M. Belkin, Fit without fear: Remarkable mathematical phenomena of deep learning through the prism of interpolation. Acta Numerica 30, 203–248 (2021)
A. Ben-Tal, A. Nemirovski, Lectures on Modern Convex Optimization (Society for Industrial and Applied Mathematics, 2001)
A.S. Berahas, L. Cao, K. Choromanski, K. Scheinberg, Linear interpolation gives better gradients than gaussian smoothing in derivative-free optimization (2019)
A.S. Berahas, L. Cao, K. Scheinberg, Global convergence rate analysis of a generic line search algorithm with noise (2019)
A.S. Berahas, L. Cao, K. Choromanski, K. Scheinberg, A theoretical and empirical comparison of gradient approximations in derivative-free optimization (2020)
E.H. Bergou, E. Gorbunov, P. Richtárik, Stochastic three points method for unconstrained smooth minimization (2019)
A. Beznosikov, S. Horváth, P. Richtárik, M. Safaryan, On biased compression for distributed learning. Preprint (2020). arXiv:2002.12410
S. Bhojanapalli, A. Kyrillidis, S. Sanghavi, Dropping convexity for faster semi-definite optimization, in Conference on Learning Theory, pp. 530–582 (2016)
E.G. Birgin, J. Gardenghi, J.M. Martínez, S.A. Santos, P.L. Toint, Worst-case evaluation complexity for unconstrained nonlinear optimization using high-order regularized models. Mathematical Programming 163(1–2), 359–368 (2017)
A. Blum, J. Hopcroft, R. Kannan, Foundations of Data Science (Cambridge University Press, 2016)
A. Blum, R.L. Rivest, Training a 3-node neural network is np-complete, in Advances in Neural Information Processing Systems, pp. 494–501 (1989)
T. Blumensath, M.E. Davies, Iterative hard thresholding for compressed sensing. Appl. Comput. Harmonic Anal. 27(3), 265–274 (2009)
L. Bogolubsky, P. Dvurechensky, A. Gasnikov, G. Gusev, Y. Nesterov, A.M. Raigorodskii, A. Tikhonov, M. Zhukovskii, Learning supervised pagerank with gradient-based and gradient-free optimization methods, in Advances in Neural Information Processing Systems 29, ed. by D.D. Lee, M. Sugiyama, U.V. Luxburg, I. Guyon, R. Garnett (Curran Associates, Inc., 2016), pp. 4914–4922. arXiv:1603.00717
L. Bottou, Curiously fast convergence of some stochastic gradient descent algorithms, in Proceedings of the Symposium on Learning and Data Science, Paris (2009)
L. Bottou, Large-scale machine learning with stochastic gradient descent, in Proceedings of COMPSTAT’2010 (Springer, 2010), pp. 177–186
L. Bottou, Stochastic gradient descent tricks, in Neural Networks: Tricks of the Trade (Springer, 2012), pp. 421–436
L. Bottou, F.E. Curtis, J. Nocedal, Optimization methods for large-scale machine learning. SIAM Review 60(2), 223–311 (2018)
S. Boyd, L. Vandenberghe, Convex Optimization (NY Cambridge University Press, 2004)
J. Bu, M. Mesbahi, A note on Nesterov’s accelerated method in nonconvex optimization: a weak estimate sequence approach. Preprint (2020). arXiv:2006.08548
S. Bubeck, Introduction to online optimization (2011)
S. Bubeck, Convex optimization: Algorithms and complexity. Found. Trends Mach. Learn. 8(3–4), 231–357 (Nov 2015)
E.J. Candès, B. Recht, Exact matrix completion via convex optimization. Found. Comput. Math. 9(6), 717 (2009)
E.J. Candès, T. Tao, Decoding by linear programming. IEEE Trans. Inf. Theory 51(12), 4203–4215 (2005)
E.J. Candès, T. Tao, The power of convex relaxation: Near-optimal matrix completion. IEEE Trans. Inf. Theory 56(5), 2053–2080 (2010)
E.J. Candès, M.B. Wakin, S.P. Boyd, Enhancing sparsity by reweighted ℓ1 minimization. J. Fourier Anal. Appl. 14(5–6), 877–905 (2008)
E.J. Candès, X. Li, M. Soltanolkotabi, Phase retrieval via wirtinger flow: Theory and algorithms. IEEE Trans. Inf. Theory 61(4), 1985–2007 (2015)
Y. Carmon, J.C. Duchi, Gradient descent efficiently finds the cubic-regularized non-convex newton step. Preprint (2016). arXiv:1612.00547
Y. Carmon, J.C. Duchi, O. Hinder, A. Sidford, “Convex until proven guilty”: Dimension-free acceleration of gradient descent on non-convex functions, in Proceedings of Machine Learning Research, vol. 70 (International Convention Centre, Sydney, Australia, 06–11 Aug 2017), pp. 654–663. PMLR
Y. Carmon, J.C. Duchi, O. Hinder, A. Sidford, Accelerated methods for nonconvex optimization. SIAM J. Optim. 28(2), 1751–1772 (2018)
Y. Carmon, J.C. Duchi, O. Hinder, A. Sidford, Lower bounds for finding stationary points II: first-order methods. Mathematical Programming (Sep 2019)
Y. Carmon, J.C. Duchi, O. Hinder, A. Sidford, Lower bounds for finding stationary points i. Mathematical Programming 184(1), 71–120 (Nov 2020)
C. Cartis, N.I. Gould, P.L. Toint, Adaptive cubic regularisation methods for unconstrained optimization. part i: motivation, convergence and numerical results. Mathematical Programming 127(2), 245–295 (2011)
C. Cartis, N.I.M. Gould, P.L. Toint, Adaptive cubic regularisation methods for unconstrained optimization. part ii: worst-case function- and derivative-evaluation complexity. Mathematical Programming 130(2), 295–319 (2011)
C. Cartis, N.I.M. Gould, P.L. Toint, Improved second-order evaluation complexity for unconstrained nonlinear optimization using high-order regularized models (2018). arXiv:1708.04044
C. Cartis, N.I. Gould, P.L. Toint, Universal regularization methods: Varying the power, the smoothness and the accuracy. SIAM J. Optim. 29(1), 595–615 (2019)
V. Charisopoulos, A.R. Benson, A. Damle, Entrywise convergence of iterative methods for eigenproblems. Preprint (2020). arXiv:2002.08491
Y. Chen, Y. Chi, Harnessing structures in big data via guaranteed low-rank matrix estimation. Preprint (2018). arXiv:1802.08397
Z. Chen, T. Yang, A variance reduction method for non-convex optimization with improved convergence under large condition number. Preprint (2018). arXiv:1809.06754
Z. Chen, Y. Zhou, Momentum with variance reduction for nonconvex composition optimization. Preprint (2020). arXiv:2005.07755
X. Chen, S. Liu, R. Sun, M. Hong, On the convergence of a class of adam-type algorithms for non-convex optimization. Preprint (2018). arXiv:1808.02941
Y. Chen, Y. Chi, J. Fan, C. Ma, Gradient descent with random initialization: Fast global convergence for nonconvex phase retrieval. Mathematical Programming 176(1–2), 5–37 (2019)
Y. Chi, Y.M. Lu, Y. Chen, Nonconvex optimization meets low-rank matrix factorization: An overview. Preprint (2018). arXiv:1809.09573
Collection of optimizers for pytorch, https://github.com/jettify/pytorch-optimizer
P.L. Combettes, J.-C. Pesquet, Proximal splitting methods in signal processing, in Fixed-Point Algorithms for Inverse Problems in Science and Engineering (Springer, 2011), pp. 185–212
A. Conn, N. Gould, P. Toint, Trust Region Methods (Society for Industrial and Applied Mathematics, 2000)
A. Conn, K. Scheinberg, L. Vicente, Introduction to Derivative-Free Optimization (Society for Industrial and Applied Mathematics, 2009)
F.E. Curtis, K. Scheinberg, Optimization methods for supervised machine learning: From linear models to deep learning. Preprint (2017). arXiv:1706.10207
A. Cutkosky, F. Orabona, Momentum-based variance reduction in non-convex sgd, in Advances in Neural Information Processing Systems, pp. 15236–15245 (2019)
C.D. Dang, G. Lan, Stochastic block mirror descent methods for nonsmooth and stochastic optimization. SIAM J. Optim. 25(2), 856–881 (2015)
D. Davis, D. Drusvyatskiy, Stochastic model-based minimization of weakly convex functions. SIAM J. Optim. 29(1), 207–239 (2019)
A. Defazio, Understanding the role of momentum in non-convex optimization: Practical insights from a lyapunov analysis. Preprint (2020). arXiv:2010.00406
A. Defazio, L. Bottou, On the ineffectiveness of variance reduced optimization for deep learning, in Advances in Neural Information Processing Systems, pp. 1753–1763 (2019)
A. Defazio, F. Bach, S. Lacoste-Julien, Saga: A fast incremental gradient method with support for non-strongly convex composite objectives, in Proceedings of the 27th International Conference on Neural Information Processing Systems, NIPS’14 (MIT Press, Cambridge, MA, USA, 2014), pp. 1646–1654
A. Defazio, J. Domke, et al., Finito: A faster, permutable incremental gradient method for big data problems, in International Conference on Machine Learning, pp. 1125–1133 (2014)
A. Défossez, L. Bottou, F. Bach, N. Usunier, On the convergence of adam and adagrad. Preprint (2020). arXiv:2003.02395
V. Demin, D. Nekhaev, I. Surazhevsky, K. Nikiruy, A. Emelyanov, S. Nikolaev, V. Rylkov, M. Kovalchuk, Necessary conditions for stdp-based pattern recognition learning in a memristive spiking neural network. Neural Networks 134, 64–75 (2021)
J. Devlin, M.-W. Chang, K. Lee, K. Toutanova, Bert: Pre-training of deep bidirectional transformers for language understanding. Preprint (2018). arXiv:1810.04805
J. Diakonikolas, M.I. Jordan, Generalized momentum-based methods: A Hamiltonian perspective. Preprint (2019). arXiv:1906.00436
T. Ding, D. Li, R. Sun, Spurious local minima exist for almost all over-parameterized neural networks (2019)
J. Duchi, E. Hazan, Y. Singer, Adaptive subgradient methods for online learning and stochastic optimization. J. Mach. Learn. Res. 12(Jul.), 2121–2159 (2011)
J. Duchi, M.I. Jordan, B. McMahan, Estimation, optimization, and parallelism when data is sparse, in Advances in Neural Information Processing Systems, pp. 2832–2840 (2013)
D. Dvinskikh, A. Ogaltsov, A. Gasnikov, P. Dvurechensky, V. Spokoiny, On the line-search gradient methods for stochastic optimization. IFAC-PapersOnLine 53(2), 1715–1720 (2020). 21th IFAC World Congress. arXiv:1911.08380
P. Dvurechensky, Gradient method with inexact oracle for composite non-convex optimization (2017). arXiv:1703.09180
P. Dvurechensky, M. Staudigl, Hessian barrier algorithms for non-convex conic optimization (2021). arXiv:2111.00100
P. Dvurechensky, M. Staudigl, C.A. Uribe, Generalized self-concordant Hessian-barrier algorithms (2019). arXiv:1911.01522. WIAS Preprint No. 2693
P.E. Dvurechensky, A.V. Gasnikov, E.A. Nurminski, F.S. Stonyakin, Advances in Low-Memory Subgradient Optimization (Springer International Publishing, Cham, 2020), pp. 19–59. arXiv:1902.01572
P. Dvurechensky, E. Gorbunov, A. Gasnikov, An accelerated directional derivative method for smooth stochastic convex optimization. Eur. J. Oper. Res. 290(2), 601–621 (2021)
P. Dvurechensky, S. Shtern, M. Staudigl, First-order methods for convex optimization. EURO J. Comput. Optim. 9, 100015 (2021). arXiv:2101.00935
N. Emmenegger, R. Kyng, A.N. Zehmakan, On the oracle complexity of higher-order smooth non-convex finite-sum optimization. Preprint (2021). arXiv:2103.05138
Y.G. Evtushenko, Numerical methods for finding global extrema (case of a non-uniform mesh). USSR Comput. Math. Math. Phys. 11(6), 38–54 (1971)
C. Fang, C.J. Li, Z. Lin, T. Zhang, Spider: Near-optimal non-convex optimization via stochastic path-integrated differential estimator, in Advances in Neural Information Processing Systems, pp. 689–699 (2018)
C. Fang, Z. Lin, T. Zhang, Sharp analysis for nonconvex sgd escaping from saddle points, in Conference on Learning Theory, pp. 1192–1234 (2019)
I. Fatkhullin, B. Polyak, Optimizing static linear feedback: Gradient method. Preprint (2020). arXiv:2004.09875
M. Fazel, R. Ge, S.M. Kakade, M. Mesbahi, Global convergence of policy gradient methods for the linear quadratic regulator (2019)
S. Feizi, H. Javadi, J. Zhang, D. Tse, Porcupine neural networks:(almost) all local optima are global. Preprint (2017). arXiv:1710.02196
A.D. Flaxman, A.T. Kalai, H.B. McMahan, Online convex optimization in the bandit setting: Gradient descent without a gradient, in Proceedings of the Sixteenth Annual ACM-SIAM Symposium on Discrete Algorithms, SODA ’05 (Society for Industrial and Applied Mathematics, Philadelphia, PA, USA, 2005), pp. 385–394
C.A. Floudas, P.M. Pardalos, Encyclopedia of Optimization (Springer Science & Business Media, 2008)
A. Gasnikov, Universal Gradient Descent (MCCME, Moscow, 2021)
A. Gasnikov, P. Dvurechensky, M. Zhukovskii, S. Kim, S. Plaunov, D. Smirnov, F. Noskov, About the power law of the pagerank vector component distribution. part 2. The buckley–osthus model, verification of the power law for this model, and setup of real search engines. Numer. Anal. Appl. 11(1), 16–32 (2018)
R. Ge, J. Zou, Intersecting faces: Non-negative matrix factorization with new guarantees, in International Conference on Machine Learning, pp. 2295–2303 (PMLR, 2015)
R. Ge, F. Huang, C. Jin, Y. Yuan, Escaping from saddle points–online stochastic gradient for tensor decomposition, in Conference on Learning Theory, pp. 797–842 (2015)
S. Ghadimi, G. Lan, Stochastic first- and zeroth-order methods for nonconvex stochastic programming. SIAM J. Optim. 23(4), 2341–2368 (2013). arXiv:1309.5549
S. Ghadimi, G. Lan, Accelerated gradient methods for nonconvex nonlinear and stochastic programming. Mathematical Programming 156(1), 59–99 (2016)
S. Ghadimi, G. Lan, H. Zhang, Mini-batch stochastic approximation methods for nonconvex stochastic composite optimization. Mathematical Programming 155(1), 267–305 (2016). arXiv:1308.6594
S. Ghadimi, G. Lan, H. Zhang, Generalized uniformly optimal methods for nonlinear programming. J. Scientif. Comput. 79(3), 1854–1881 (2019)
M.X. Goemans, D.P. Williamson, Improved approximation algorithms for maximum cut and satisfiability problems using semidefinite programming. J. ACM (JACM) 42(6), 1115–1145 (1995)
I. Goodfellow, Y. Bengio, A. Courville, Deep Learning (MIT Press, 2016). http://www.deeplearningbook.org
I. Goodfellow, Y. Bengio, A. Courville, Y. Bengio, Deep learning, vol. 1 (MIT Press Cambridge, 2016)
E. Gorbunov, P. Dvurechensky, A. Gasnikov, An accelerated method for derivative-free smooth stochastic convex optimization. Preprint (2018). arXiv:1802.09022 (accepted to SIOPT)
E. Gorbunov, M. Danilova, A. Gasnikov, Stochastic optimization with heavy-tailed noise via accelerated gradient clipping, in Advances in Neural Information Processing Systems, vol. 33, ed. by H. Larochelle, M. Ranzato, R. Hadsell, M.F. Balcan, H. Lin (Curran Associates, Inc., 2020), pp. 15042–15053
E. Gorbunov, F. Hanzely, P. Richtárik, A unified theory of sgd: Variance reduction, sampling, quantization and coordinate descent, in International Conference on Artificial Intelligence and Statistics, pp. 680–690 (2020)
E.A. Gorbunov, A. Bibi, O. Sener, E.H. Bergou, P. Richtárik, A stochastic derivative free optimization method with momentum, in ICLR (2020)
E. Gorbunov, K.P. Burlachenko, Z. Li, P. Richtarik, Marina: Faster non-convex distributed learning with compression, in Proceedings of the 38th International Conference on Machine Learning, vol. 139 of Proceedings of Machine Learning Research, ed. by M. Meila, T. Zhang (PMLR, 18–24 Jul 2021), pp. 3788–3798
E. Gorbunov, M. Danilova, I. Shibaev, P. Dvurechensky, A. Gasnikov, Near-optimal high probability complexity bounds for non-smooth stochastic optimization with heavy-tailed noise (2021). arXiv:2106.05958
A. Gorodetskiy, A. Shlychkova, A.I. Panov, Delta schema network in model-based reinforcement learning, in Artificial General Intelligence, ed. by B. Goertzel, A. I. Panov, A. Potapov, R. Yampolskiy (Springer International Publishing, Cham, 2020), pp. 172–182
A. Gotmare, N. S. Keskar, C. Xiong, R. Socher, A closer look at deep learning heuristics: Learning rate restarts, warmup and distillation. Preprint (2018). arXiv:1810.13243
R.M. Gower, N. Loizou, X. Qian, A. Sailanbayev, E. Shulgin, P. Richtárik, Sgd: General analysis and improved rates, in International Conference on Machine Learning, pp. 5200–5209 (2019)
R. Gower, O. Sebbouh, N. Loizou, Sgd for structured nonconvex functions: Learning rates, minibatching and interpolation, in International Conference on Artificial Intelligence and Statistics (PMLR, 2021), pp. 1315–1323
P. Goyal, P. Dollár, R. Girshick, P. Noordhuis, L. Wesolowski, A. Kyrola, A. Tulloch, Y. Jia, K. He, Accurate, large minibatch sgd: Training imagenet in 1 hour. Preprint (2017). arXiv:1706.02677
A.O. Griewank, Generalized descent for global optimization. J. Optim. Theory Appl. 34(1), 11–39 (1981)
S. Guminov, A. Gasnikov, Accelerated methods for alpha-weakly-quasi-convex problems. Preprint (2017). arXiv:1710.00797
S.V. Guminov, Y.E. Nesterov, P.E. Dvurechensky, A.V. Gasnikov, Accelerated primal-dual gradient descent with linesearch for convex, nonconvex, and nonsmooth optimization problems. Doklady Mathematics 99(2), 125–128 (2019)
S. Guminov, P. Dvurechensky, N. Tupitsa, A. Gasnikov, On a combination of alternating minimization and Nesterov’s momentum, in Proceedings of the 38th International Conference on Machine Learning, vol. 145 of Proceedings of Machine Learning Research, Virtual (PMLR, 18–24 Jul 2021). arXiv:1906.03622. WIAS Preprint No. 2695
B.D. Haeffele, R. Vidal, Global optimality in neural network training, in Proceedings of the IEEE Conference on Computer Vision and Pattern Recognition, pp. 7331–7339 (2017)
G. Haeser, H. Liu, Y. Ye, Optimality condition and complexity analysis for linearly-constrained optimization without differentiability on the boundary. Mathematical Programming 178(1), 263–299 (2019)
J.Z. HaoChen, S. Sra, Random shuffling beats sgd after finite epochs. Preprint (2018). arXiv:1806.10077
E. Hazan, K. Levy, S. Shalev-Shwartz, Beyond convexity: Stochastic quasi-convex optimization, in Advances in Neural Information Processing Systems, pp. 1594–1602 (2015)
K. He, X. Zhang, S. Ren, J. Sun, Deep residual learning for image recognition, in Proceedings of the IEEE Conference on Computer Vision and Pattern Recognition, pp. 770–778 (2016)
O. Hinder, A. Sidford, N. Sohoni, Near-optimal methods for minimizing star-convex functions and beyond, in Conference on Learning Theory (PMLR, 2020), pp. 1894–1938
T. Hofmann, A. Lucchi, S. Lacoste-Julien, B. McWilliams, Variance reduced stochastic gradient descent with neighbors, in Advances in Neural Information Processing Systems, pp. 2305–2313 (2015)
S. Horváth, D. Kovalev, K. Mishchenko, S. Stich, P. Richtárik, Stochastic distributed learning with gradient quantization and variance reduction. Preprint (2019). arXiv:1904.05115
S.A. Ilyuhin, A.V. Sheshkus, V.L. Arlazarov, Recognition of images of Korean characters using embedded networks, in Twelfth International Conference on Machine Vision (ICMV 2019), vol. 11433, ed. by W. Osten, D.P. Nikolaev (International Society for Optics and Photonics, SPIE, 2020), pp. 273–279
P. Jain, P. Kar, Non-convex optimization for machine learning. Found. Trends Mach. Learn. 10(3–4), 142–336 (2017)
P. Jain, P. Netrapalli, S. Sanghavi, Low-rank matrix completion using alternating minimization, in Proceedings of the Forty-Fifth Annual ACM Symposium on Theory of Computing, pp. 665–674 (2013)
Z. Ji, M.J. Telgarsky, Gradient descent aligns the layers of deep linear networks, in 7th International Conference on Learning Representations, ICLR 2019 (2019)
K. Ji, Z. Wang, Y. Zhou, Y. Liang, Improved zeroth-order variance reduced algorithms and analysis for nonconvex optimization (2019)
C. Jin, R. Ge, P. Netrapalli, S.M. Kakade, M.I. Jordan, How to escape saddle points efficiently. Proceedings of Machine Learning Research, vol. 70 (International Convention Centre, Sydney, Australia, 06–11 Aug 2017), pp. 1724–1732. PMLR
C. Jin, P. Netrapalli, M.I. Jordan, Accelerated gradient descent escapes saddle points faster than gradient descent, in Conference On Learning Theory (PMLR, 2018), pp. 1042–1085
C. Jin, P. Netrapalli, R. Ge, S. M. Kakade, M. I. Jordan, On nonconvex optimization for machine learning: Gradients, stochasticity, and saddle points. J. ACM (JACM) 68(2), 1–29 (2021)
R. Johnson, T. Zhang, Accelerating stochastic gradient descent using predictive variance reduction, in Advances in Neural Information Processing Systems, pp. 315–323 (2013)
H. Karimi, J. Nutini, M. Schmidt, Linear convergence of gradient and proximal-gradient methods under the polyak-łojasiewicz condition, in Joint European Conference on Machine Learning and Knowledge Discovery in Databases (Springer, 2016), pp. 795–811
A. Khaled, P. Richtárik, Better theory for sgd in the nonconvex world. Preprint (2020). arXiv:2002.03329
S. Khot, G. Kindler, E. Mossel, R. O’Donnell, Optimal inapproximability results for max-cut and other 2-variable csps? SIAM J. Comput. 37(1), 319–357 (2007)
A. Khritankov, Hidden feedback loops in machine learning systems: A simulation model and preliminary results, in Software Quality: Future Perspectives on Software Engineering Quality, ed. by D. Winkler, S. Biffl, D. Mendez, M. Wimmer, J. Bergsmann (Springer International Publishing, Cham, 2021), pp. 54–65
R. Kidambi, P. Netrapalli, P. Jain, S. Kakade, On the insufficiency of existing momentum schemes for stochastic optimization, in 2018 Information Theory and Applications Workshop (ITA) (IEEE, 2018), pp. 1–9
L. Kiefer, M. Storath, A. Weinmann, Iterative potts minimization for the recovery of signals with discontinuities from indirect measurements: The multivariate case. Found. Comput. Math. 1–46 (2020)
D. P. Kingma, J. Ba, Adam: A method for stochastic optimization. Preprint (2014). arXiv:1412.6980
V. V. Kniaz, S. Y. Zheltov, F. Remondino, V. A. Knyaz, A. Gruen, Wire structure image-based 3d reconstruction aided by deep learning. volume XLIII-B2-2020, pp. 435–441, Göttingen, 2020. Copernicus. XXIV ISPRS Congress 2020 (virtual); Conference Location: Online; Conference Date: August 31–September 2, 2020; Due to the Corona virus (COVID-19) the conference was conducted virtually
V. V. Kniaz, V. A. Knyaz, V. Mizginov, A. Papazyan, N. Fomin, L. Grodzitsky, Adversarial dataset augmentation using reinforcement learning and 3d modeling, in Advances in Neural Computation, Machine Learning, and Cognitive Research IV, ed. by B. Kryzhanovsky, W. Dunin-Barkowski, V. Redko, Y. Tiumentsev (Springer International Publishing, Cham, 2021), pp. 316–329
J. M. Kohler, A. Lucchi, Sub-sampled cubic regularization for non-convex optimization, in International Conference on Machine Learning, pp. 1895–1904 (2017)
G. Kornowski, O. Shamir, Oracle complexity in nonsmooth nonconvex optimization. Preprint (2021). arXiv:2104.06763
D. Kovalev, S. Horváth, P. Richtárik, Don’t jump through hoops and remove those loops: Svrg and katyusha are better without the outer loop, in Algorithmic Learning Theory, pp. 451–467 (2020)
A. Krizhevsky, G. Hinton, et al., Learning multiple layers of features from tiny images (2009)
P. Kuderov, A. Panov, Planning with hierarchical temporal memory for deterministic markov decision problem, in Proceedings of the 13th International Conference on Agents and Artificial Intelligence - Volume 2: ICAART (INSTICC, SciTePress, 2021), pp. 1073–1081
T. Lacroix, N. Usunier, G. Obozinski, Canonical tensor decomposition for knowledge base completion, in International Conference on Machine Learning, pp. 2863–2872 (2018)
G. Lan, First-Order and Stochastic Optimization Methods for Machine Learning (Springer, 2020)
G. Lan, Y. Yang, Accelerated stochastic algorithms for nonconvex finite-sum and multiblock optimization. SIAM J. Optim. 29(4), 2753–2784 (2019)
J. Larson, M. Menickelly, S. M. Wild, Derivative-free optimization methods. Acta Numerica 28, 287–404 (2019)
J. C. H. Lee, P. Valiant, Optimizing star-convex functions, in 2016 IEEE 57th Annual Symposium on Foundations of Computer Science (FOCS), pp. 603–614 (2016)
Y. Lei, T. Hu, G. Li, K. Tang, Stochastic gradient descent for nonconvex learning without bounded gradient assumptions. IEEE Trans. Neural Networks Learn. Syst. (2019)
K. Y. Levy, The power of normalization: Faster evasion of saddle points. Preprint (2016). arXiv:1611.04831
Y. Li, K. Lee, Y. Bresler, Identifiability in blind deconvolution with subspace or sparsity constraints. IEEE Trans. Inf. Theory 62(7), 4266–4275 (2016)
D. Li, T. Ding, R. Sun, Over-parameterized deep neural networks have no strict local minima for any continuous activations. Preprint (2018). arXiv:1812.11039
Z. Li, H. Bao, X. Zhang, P. Richtárik, Page: A simple and optimal probabilistic gradient estimator for nonconvex optimization. Preprint (2020). arXiv:2008.10898
Z. Li, P. Richtárik, A unified analysis of stochastic gradient methods for nonconvex federated optimization. Preprint (2020). arXiv:2006.07013
S. Liang, R. Sun, Y. Li, R. Srikant, Understanding the loss surface of neural networks for binary classification, in International Conference on Machine Learning, pp. 2835–2843 (2018)
S. Liu, B. Kailkhura, P.-Y. Chen, P. Ting, S. Chang, L. Amini, Zeroth-order stochastic variance reduction for nonconvex optimization (2018)
R. Livni, S. Shalev-Shwartz, O. Shamir, On the computational efficiency of training neural networks, in Advances in Neural Information Processing Systems, pp. 855–863 (2014)
N. Loizou, S. Vaswani, I. H. Laradji, S. Lacoste-Julien, Stochastic polyak step-size for sgd: An adaptive learning rate for fast convergence, in International Conference on Artificial Intelligence and Statistics (PMLR, 2021), pp. 1306–1314
S. Lojasiewicz, A topological property of real analytic subsets. Coll. du CNRS, Les équations aux dérivées partielles 117, 87–89 (1963)
I. Loshchilov, F. Hutter, Sgdr: Stochastic gradient descent with warm restarts. Preprint (2016). arXiv:1608.03983
A. Lucchi, J. Kohler, A stochastic tensor method for non-convex optimization. Preprint (2019). arXiv:1911.10367
C. Ma, K. Wang, Y. Chi, Y. Chen, Implicit regularization in nonconvex statistical estimation: Gradient descent converges linearly for phase retrieval and matrix completion, in International Conference on Machine Learning (PMLR, 2018), pp. 3345–3354
S. Ma, R. Bassily, M. Belkin, The power of interpolation: Understanding the effectiveness of sgd in modern over-parametrized learning, in International Conference on Machine Learning (PMLR, 2018), pp. 3325–3334
J. Mairal, Incremental majorization-minimization optimization with application to large-scale machine learning. SIAM J. Optim. 25(2), 829–855 (2015)
D. Malik, A. Pananjady, K. Bhatia, K. Khamaru, P. L. Bartlett, M. J. Wainwright, Derivative-free methods for policy optimization: Guarantees for linear quadratic systems (2020)
J. Martens, Deep learning via hessian-free optimization, in International Conference on Machine Learning, vo 27, pp. 735–742 (2010)
T. Mikolov, Statistical language models based on neural networks, Presentation at Google, Mountain View, 2nd April, 80 (2012)
K. Mishchenko, E. Gorbunov, M. Takáč, P. Richtárik, Distributed learning with compressed gradient differences. Preprint (2019). arXiv:1901.09269
K. Mishchenko, A. Khaled, P. Richtárik, Random reshuffling: Simple analysis with vast improvements. Preprint (2020). arXiv:2006.05988
K. G. Murty, S. N. Kabadi, Some np-complete problems in quadratic and nonlinear programming. Mathematical Programming 39(2), 117–129 (1987)
J. A. Nelder, R. Mead, A simplex method for function minimization. Comput. J. 7(4), 308–313 (1965)
A. Nemirovski, Orth-method for smooth convex optimization. Izvestia AN SSSR Transl. Eng. Cybern. Soviet J. Comput. Syst. Sci. 2, 937–947 (1982)
Y. Nesterov, A method of solving a convex programming problem with convergence rate o(1∕k2). Soviet Math. Doklady 27(2), 372–376 (1983)
Y. Nesterov, Introductory Lectures on Convex Optimization: A Basic Course (Kluwer Academic Publishers, Massachusetts, 2004)
Y. Nesterov, How to make the gradients small. Optima 88, 10–11 (2012)
Y. Nesterov, Lectures on Convex Optimization, vol. 137 (Springer, 2018)
Y. Nesterov, B. Polyak, Cubic regularization of Newton method and its global performance. Mathematical Programming 108(1), 177–205 (2006)
Y. Nesterov, V. Spokoiny, Random gradient-free minimization of convex functions. Found. Comput. Math. 17(2), 527–566 (2017). First appeared in 2011 as CORE discussion paper 2011/16
Y. Nesterov, A. Gasnikov, S. Guminov, P. Dvurechensky, Primal-dual accelerated gradient methods with small-dimensional relaxation oracle. Optim. Methods Softw., 1–28 (2020). arXiv:1809.05895
B. Neyshabur, S. Bhojanapalli, D. McAllester, N. Srebro, Exploring generalization in deep learning, in Advances in Neural Information Processing Systems, pp. 5947–5956 (2017)
L. M. Nguyen, J. Liu, K. Scheinberg, M. Takáč, Sarah: A novel method for machine learning problems using stochastic recursive gradient, in International Conference on Machine Learning, pp. 2613–2621 (2017)
L. M. Nguyen, J. Liu, K. Scheinberg, M. Takáč, Stochastic recursive gradient algorithm for nonconvex optimization. Preprint (2017). arXiv:1705.07261
Q. Nguyen, M. C. Mukkamala, M. Hein, On the loss landscape of a class of deep neural networks with no bad local valleys. Preprint (2018). arXiv:1809.10749
L. M. Nguyen, Q. Tran-Dinh, D. T. Phan, P. H. Nguyen, M. van Dijk, A unified convergence analysis for shuffling-type gradient methods. Preprint (2020). arXiv:2002.08246
J. Nocedal, S. Wright, Numerical Optimization (Springer Science & Business Media, 2006)
K. Osawa, Y. Tsuji, Y. Ueno, A. Naruse, R. Yokota, S. Matsuoka, Second-order optimization method for large mini-batch: Training resnet-50 on imagenet in 35 epochs. Preprint (2018). arXiv:1811.12019, 1:2
N. Papernot, P. McDaniel, I. Goodfellow, S. Jha, Z. B. Celik, A. Swami, Practical black-box attacks against machine learning (2017)
V. Papyan, Y. Romano, J. Sulam, M. Elad, Convolutional dictionary learning via local processing, in Proceedings of the IEEE International Conference on Computer Vision, pp. 5296–5304 (2017)
S. Park, S. H. Jung, P. M. Pardalos, Combining stochastic adaptive cubic regularization with negative curvature for nonconvex optimization. J. Optim. Theory Appl. 184(3), 953–971 (2020)
R. Pascanu, T. Mikolov, Y. Bengio, On the difficulty of training recurrent neural networks, in International Conference on Machine Learning, pp. 1310–1318 (2013)
B. Polyak, Gradient methods for the minimisation of functionals. USSR Comput. Math. Math. Phys. 3(4), 864–878 (1963)
B. T. Polyak, Some methods of speeding up the convergence of iteration methods. USSR Comput. Math. Math. Phys. 4(5), 1–17 (1964)
B. Polyak, Introduction to Optimization (Optimization Software, New York, 1987)
Q. Qu, X. Li, Z. Zhu, A nonconvex approach for exact and efficient multichannel sparse blind deconvolution, in Advances in Neural Information Processing Systems, pp. 4015–4026 (2019)
S. Rajput, A. Gupta, D. Papailiopoulos, Closing the convergence gap of sgd without replacement. Preprint (2020). arXiv:2002.10400
S. J. Reddi, A. Hefny, S. Sra, B. Poczos, A. Smola, Stochastic variance reduction for nonconvex optimization, in International conference on machine learning, pp. 314–323 (2016)
S. J. Reddi, S. Sra, B. Poczos, A. J. Smola, Proximal stochastic methods for nonsmooth nonconvex finite-sum optimization, in Advances in Neural Information Processing Systems, pp. 1145–1153 (2016)
S. J. Reddi, S. Kale, S. Kumar, On the convergence of adam and beyond. Preprint (2019). arXiv:1904.09237
A. Rezanov, D. Yudin, Deep neural networks for ortophoto-based vehicle localization, in Advances in Neural Computation, Machine Learning, and Cognitive Research IV, ed. by B. Kryzhanovsky, W. Dunin-Barkowski, V. Redko, Y. Tiumentsev (Springer International Publishing, Cham, 2021), pp. 167–174
A. Risteski, Y. Li, Algorithms and matching lower bounds for approximately-convex optimization, in NIPS (2016)
A. Roy, K. Balasubramanian, S. Ghadimi, P. Mohapatra, Escaping saddle-point faster under interpolation-like conditions, in Advances in Neural Information Processing Systems, p. 33 (2020)
C. W. Royer, S. J. Wright, Complexity analysis of second-order line-search algorithms for smooth nonconvex optimization. SIAM J. Optim. 28(2), 1448–1477 (2018)
I. Safran, O. Shamir, Spurious local minima are common in two-layer relu neural networks, in International Conference on Machine Learning (PMLR, 2018), pp. 4433–4441
K. A. Sankararaman, S. De, Z. Xu, W. R. Huang, T. Goldstein, The impact of neural network overparameterization on gradient confusion and stochastic gradient descent. Preprint (2019). arXiv:1904.06963
M. Schmidt, N. L. Roux, Fast convergence of stochastic gradient descent under a strong growth condition. Preprint (2013). arXiv:1308.6370
M. Schmidt, N. Le Roux, F. Bach, Minimizing finite sums with the stochastic average gradient. Mathematical Programming 162(1–2), 83–112 (2017)
M. Schumer, K. Steiglitz, Adaptive step size random search. IEEE Trans. Automatic Control 13(3), 270–276 (1968)
O. Sebbouh, R. M. Gower, A. Defazio, On the convergence of the stochastic heavy ball method. Preprint (2020). arXiv:2006.07867
O. Sener, V. Koltun, Learning to guide random search, in International Conference on Learning Representations (2020)
S. Shalev-Shwartz, Sdca without duality, regularization, and individual convexity, in International Conference on Machine Learning, pp. 747–754 (2016)
Y. Shechtman, Y. C. Eldar, O. Cohen, H. N. Chapman, J. Miao, M. Segev, Phase retrieval with application to optical imaging: a contemporary overview. IEEE Signal Process. Mag. 32(3), 87–109 (2015)
Z. Shen, P. Zhou, C. Fang, A. Ribeiro, A stochastic trust region method for non-convex minimization. Preprint (2019). arXiv:1903.01540
L. Shi, Y. Chi, Manifold gradient descent solves multi-channel sparse blind deconvolution provably and efficiently, in ICASSP 2020-2020 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP) (IEEE, 2020), pp. 5730–5734
B. Shi, W. J. Su, M. I. Jordan, On learning rates and schrödinger operators. Preprint (2020). arXiv:2004.06977
N. Shi, D. Li, M. Hong, R. Sun, Rmsprop converges with proper hyper-parameter, in International Conference on Learning Representations (2021)
I. Shibaev, P. Dvurechensky, A. Gasnikov, Zeroth-order methods for noisy Hölder-gradient functions. Optimization Letters (2021). (accepted), arXiv:2006.11857. https://doi.org/10.1007/s11590-021-01742-z
Y. Shin, Effects of depth, width, and initialization: A convergence analysis of layer-wise training for deep linear neural networks. Preprint (2019). arXiv:1910.05874
N. Z. Shor, Generalized gradient descent with application to block programming. Kibernetika 3(3), 53–55 (1967)
A. Skrynnik, A. Staroverov, E. Aitygulov, K. Aksenov, V. Davydov, A. I. Panov, Forgetful experience replay in hierarchical reinforcement learning from expert demonstrations. Knowl. Based Syst. 218, 106844 (2021)
L. N. Smith, Cyclical learning rates for training neural networks, in 2017 IEEE Winter Conference on Applications of Computer Vision (WACV) (IEEE, 2017), pp. 464–472
M. V. Solodov, Incremental gradient algorithms with stepsizes bounded away from zero. Comput. Optim. Appl. 11(1), 23–35 (1998)
M. Soltanolkotabi, A. Javanmard, J. D. Lee, Theoretical insights into the optimization landscape of over-parameterized shallow neural networks. IEEE Trans. Inf. Theory 65(2), 742–769 (2018)
V. Spokoiny et al., Parametric estimation. finite sample theory. Ann. Stat. 40(6), 2877–2909 (2012)
F. S. Stonyakin, D. Dvinskikh, P. Dvurechensky, A. Kroshnin, O. Kuznetsova, A. Agafonov, A. Gasnikov, A. Tyurin, C. A. Uribe, D. Pasechnyuk, S. Artamonov, Gradient methods for problems with inexact model of the objective, in Mathematical Optimization Theory and Operations Research, ed. by M. Khachay, Y. Kochetov, P. Pardalos, (Springer International Publishing, Cham, 2019), pp. 97–114 arXiv:1902.09001
F. Stonyakin, A. Tyurin, A. Gasnikov, P. Dvurechensky, A. Agafonov, D. Dvinskikh, M. Alkousa, D. Pasechnyuk, S. Artamonov, V. Piskunova, Inexact model: A framework for optimization and variational inequalities. Optim. Methods Softw. (2021). (accepted), WIAS Preprint No. 2709, arXiv:2001.09013, arXiv:1902.00990. https://doi.org/10.1080/10556788.2021.1924714
R. Sun, Optimization for deep learning: theory and algorithms. Preprint (2019). arXiv:1912.08957
I. Surazhevsky, V. Demin, A. Ilyasov, A. Emelyanov, K. Nikiruy, V. Rylkov, S. Shchanikov, I. Bordanov, S. Gerasimova, D. Guseinov, N. Malekhonova, D. Pavlov, A. Belov, A. Mikhaylov, V. Kazantsev, D. Valenti, B. Spagnolo, M. Kovalchuk, Noise-assisted persistence and recovery of memory state in a memristive spiking neuromorphic network. Chaos Solitons Fractals 146, 110890 (2021)
I. Sutskever, J. Martens, G. Dahl, G. Hinton, On the importance of initialization and momentum in deep learning, in International Conference on Machine Learning, pp. 1139–1147 (2013)
G. Swirszcz, W. M. Czarnecki, R. Pascanu, Local minima in training of deep networks (2016)
Y. S. Tan, R. Vershynin, Online stochastic gradient descent with arbitrary initialization solves non-smooth, non-convex phase retrieval. Preprint (2019). arXiv:1910.12837
W. Tao, Z. Pan, G. Wu, Q. Tao, Primal averaging: A new gradient evaluation step to attain the optimal individual convergence. IEEE Trans. Cybern. 50(2), 835–845 (2018)
A. Taylor, F. Bach, Stochastic first-order methods: non-asymptotic and computer-aided analyses via potential functions, in Conference on Learning Theory, pp. 2934–2992 (2019)
T. Tieleman, G. Hinton, Lecture 6.5-rmsprop: Divide the gradient by a running average of its recent magnitude. COURSERA Neural Networks Mach. Learn. 4(2), 26–31 (2012)
N. Tripuraneni, M. Stern, C. Jin, J. Regier, M. I. Jordan, Stochastic cubic regularization for fast nonconvex optimization, in Advances in Neural Information Processing Systems, pp. 2899–2908 (2018)
P. Tseng, An incremental gradient (-projection) method with momentum term and adaptive stepsize rule. SIAM J. Optim. 8(2), 506–531 (1998)
I. Usmanova, Robust solutions to stochastic optimization problems. Master Thesis (MSIAM); Institut Polytechnique de Grenoble ENSIMAG, Laboratoire Jean Kuntzmann (2017)
A. Vaswani, N. Shazeer, N. Parmar, J. Uszkoreit, L. Jones, A. N. Gomez, Ł. Kaiser, I. Polosukhin, Attention is all you need, in Advances in Neural Information Processing Systems, pp. 5998–6008 (2017)
S. Vaswani, F. Bach, M. Schmidt, Fast and faster convergence of sgd for over-parameterized models and an accelerated perceptron, in The 22nd International Conference on Artificial Intelligence and Statistics (PMLR, 2019), pp. 1195–1204
S. Vaswani, A. Mishkin, I. Laradji, M. Schmidt, G. Gidel, S. Lacoste-Julien, Painless stochastic gradient: Interpolation, line-search, and convergence rates, in Advances in Neural Information Processing Systems, pp. 3732–3745 (2019)
S. A. Vavasis, Black-box complexity of local minimization. SIAM J. Optim. 3(1), 60–80 (1993)
R. Vidal, J. Bruna, R. Giryes, S. Soatto, Mathematics of deep learning. Preprint (2017). arXiv:1712.04741
Z. Wang, K. Ji, Y. Zhou, Y. Liang, V. Tarokh, Spiderboost: A class of faster variance-reduced algorithms for nonconvex optimization. Preprint (2018). arXiv:1810.10690
Z. Wang, K. Ji, Y. Zhou, Y. Liang, V. Tarokh, Spiderboost and momentum: Faster variance reduction algorithms, in Advances in Neural Information Processing Systems, pp. 2403–2413 (2019)
Z. Wang, Y. Zhou, Y. Liang, G. Lan, Stochastic variance-reduced cubic regularization for nonconvex optimization, in The 22nd International Conference on Artificial Intelligence and Statistics (PMLR, 2019), pp. 2731–2740
Z. Wang, Y. Zhou, Y. Liang, G. Lan, Cubic regularization with momentum for nonconvex optimization, in Uncertainty in Artificial Intelligence (PMLR, 2020), pp. 313–322
R. Ward, X. Wu, L. Bottou, Adagrad stepsizes: Sharp convergence over nonconvex landscapes, in International Conference on Machine Learning (PMLR, 2019), pp. 6677–6686
A. C. Wilson, R. Roelofs, M. Stern, N. Srebro, B. Recht, The marginal value of adaptive gradient methods in machine learning, in Advances in Neural Information Processing Systems, pp. 4148–4158 (2017)
S. J. Wright, Optimization algorithms for data analysis. Math. Data 25, 49 (2018)
F. Wu, P. Rebeschini, Hadamard wirtinger flow for sparse phase retrieval. Preprint (2020). arXiv:2006.01065
G. Xie, L. Luo, Z. Zhang, A general analysis framework of lower complexity bounds for finite-sum optimization. Preprint (2019). arXiv:1908.08394
Y. Xu, Momentum-based variance-reduced proximal stochastic gradient method for composite nonconvex stochastic optimization. Preprint (2020). arXiv:2006.00425
P. Xu, J. Chen, D. Zou, Q. Gu, Global convergence of langevin dynamics based algorithms for nonconvex optimization, in Advances in Neural Information Processing Systems, pp. 3122–3133 (2018)
Y. Xu, R. Jin, T. Yang, First-order stochastic algorithms for escaping from saddle points in almost linear time, in Advances in Neural Information Processing Systems, pp. 5530–5540 (2018)
P. Xu, F. Roosta, M. W. Mahoney, Newton-type methods for non-convex optimization under inexact hessian information. Mathematical Programming 184(1), 35–70 (2020)
P. Xu, F. Roosta, M. W. Mahoney, Second-order optimization for non-convex machine learning: An empirical study, in Proceedings of the 2020 SIAM International Conference on Data Mining (SIAM, 2020), pp. 199–207
Y. Yan, T. Yang, Z. Li, Q. Lin, Y. Yang, A unified analysis of stochastic momentum methods for deep learning, in Proceedings of the 27th International Joint Conference on Artificial Intelligence, pp. 2955–2961 (2018)
Z. Yang, L. F. Yang, E. X. Fang, T. Zhao, Z. Wang, M. Neykov, Misspecified nonconvex statistical optimization for sparse phase retrieval. Mathematical Programming 176(1–2), 545–571 (2019)
C. Yun, S. Sra, A. Jadbabaie, Small nonlinearities in activation functions create bad local minima in neural networks. Preprint (2018). arXiv:1802.03487
J. Yun, A. C. Lozano, E. Yang, A general family of stochastic proximal gradient methods for deep learning. Preprint (2020). arXiv:2007.07484
M. Zaheer, S. Reddi, D. Sachan, S. Kale, S. Kumar, Adaptive methods for nonconvex optimization, in Advances in Neural Information Processing Systems, pp. 9793–9803 (2018)
R. Y. Zhang, Sharp global guarantees for nonconvex low-rank matrix recovery in the overparameterized regime. Preprint (2021). arXiv:2104.10790
J. Zhang, L. Xiao, Stochastic variance-reduced prox-linear algorithms for nonconvex composite optimization. Preprint (2020). arXiv:2004.04357
J. Zhang, L. Xiao, S. Zhang, Adaptive stochastic variance reduction for subsampled newton method with cubic regularization. Preprint (2018). arXiv:1811.11637
B. Zhang, J. Jin, C. Fang, L. Wang, Improved analysis of clipping algorithms for non-convex optimization, in Advances in Neural Information Processing Systems, p. 33 (2020)
J. Zhang, T. He, S. Sra, A. Jadbabaie, Why gradient clipping accelerates training: A theoretical justification for adaptivity, in International Conference on Learning Representations (2020)
J. Zhang, S. P. Karimireddy, A. Veit, S. Kim, S. Reddi, S. Kumar, S. Sra, Why are adaptive methods good for attention models? in Advances in Neural Information Processing Systems, p. 33 (2020)
Y. Zhang, Q. Qu, J. Wright, From symmetry to geometry: Tractable nonconvex problems. Preprint (2020). arXiv:2007.06753
Y. Zhang, Q. Qu, J. Wright, From symmetry to geometry: Tractable nonconvex problems. Preprint (2020). arXiv:2007.06753
Y. Zhang, Y. Zhou, K. Ji, M. M. Zavlanos, Boosting one-point derivative-free online optimization via residual feedback (2020)
C. Zhang, S. Bengio, M. Hardt, B. Recht, O. Vinyals, Understanding deep learning (still) requires rethinking generalization. Commun. ACM 64(3), 107–115 (2021)
H. Zhang, Y. Bi, J. Lavaei, General low-rank matrix optimization: Geometric analysis and sharper bounds. Preprint (2021). arXiv:2104.10356
A. Zhigljavsky, A. Zilinskas, Stochastic Global Optimization, vol. 9 (Springer Science & Business Media, 2007)
D. Zhou, Q. Gu, Lower bounds for smooth nonconvex finite-sum optimization, in International Conference on Machine Learning, pp. 7574–7583 (2019)
D. Zhou, Y. Tang, Z. Yang, Y. Cao, Q. Gu, On the convergence of adaptive gradient methods for nonconvex optimization. Preprint (2018). arXiv:1808.05671
D. Zhou, P. Xu, Q. Gu, Stochastic nested variance reduced gradient descent for nonconvex optimization, in Advances in Neural Information Processing Systems (2018)
D. Zhou, P. Xu, Q. Gu, Stochastic variance-reduced cubic regularization methods. J. Mach. Learn. Res. 20(134), 1–47 (2019)
D. Zhou, P. Xu, Q. Gu, Stochastic variance-reduced cubic regularization methods. J. Mach. Learn. Res. 20(134), 1–47 (2019)
D. Zhou, Q. Gu, Stochastic recursive variance-reduced cubic regularization methods, in International Conference on Artificial Intelligence and Statistics (PMLR, 2020), pp. 3980–3990
X. Zhu, J. Han, B. Jiang, An adaptive high order method for finding third-order critical points of nonconvex optimization. Preprint (2020). arXiv:2008.04191
Acknowledgements
The authors are grateful to A. Gornov, A. Nazin, Yu. Nesterov, B. Polyak, and K. Scheinberg for fruitful discussions and their suggestions that helped to improve the quality of the text.
The research was partially supported by the Ministry of Science and Higher Education of the Russian Federation (Goszadaniye) No.075-00337-20-03, project No. 0714-2020-0005. The work of I. Shibaev was supported by the program “Leading Scientific Schools” (grant no. NSh-775.2022.1.1).
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Danilova, M. et al. (2022). Recent Theoretical Advances in Non-Convex Optimization. In: Nikeghbali, A., Pardalos, P.M., Raigorodskii, A.M., Rassias, M.T. (eds) High-Dimensional Optimization and Probability. Springer Optimization and Its Applications, vol 191. Springer, Cham. https://doi.org/10.1007/978-3-031-00832-0_3
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