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Subdifferentiation of Regularized Functions

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Abstract

We study the Moreau regularization process for functions satisfying a general growth condition on general Banach spaces. We give differentiability criteria and we study the relationships between the subdifferentials of the function and the subdifferentials of its approximations. We also consider the Lasry-Lions process.

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References

  1. Asplund, E.: Fréchet differentiability of convex functions. Acta Math. 121, 31–47 (1968)

    Article  MathSciNet  MATH  Google Scholar 

  2. Attouch, H.: Variational Convergence of Functions and Operators. Pitman, London (1984)

    Google Scholar 

  3. Attouch, H., Azé, D.: Approximation and regularization of arbitrary functions in Hilbert spaces by the Lasry-Lions method. Ann. Inst. Henri Poincaré 10(3), 289–312 (1993)

    MATH  Google Scholar 

  4. Aubin, J.-P., Frankowska, H.: Set-valued Analysis. Birkhaüser, Boston (1990)

    MATH  Google Scholar 

  5. Aussel, D., Daniilidis, A., Thibault, L.: Subsmooth sets: functional characterizations and related concepts. Trans. Am. Math. Soc. 357(4), 1275–1301 (2005)

    Article  MathSciNet  MATH  Google Scholar 

  6. Benoist, J.: Convergence de la dérivée de la régularisée de Lasry-Lions. C. R. Acad. Sci. Paris 315, 941–944 (1992)

    MathSciNet  MATH  Google Scholar 

  7. Benyamini, Y., Lindenstrauss, J.: Geometric nonlinear functional analysis, amer. Math. Soc. Colloquium publications 48 providence (2000)

  8. Bernard, F., Thibault, L.: Prox-regularity of functions and sets in Banach spaces. Set-Valued Anal. 12(1-2), 25–47 (2004)

    Article  MathSciNet  MATH  Google Scholar 

  9. Bernard, F., Thibault, L.: Prox-regular functions in Hilbert spaces. J. Math. Anal. Appl. 303(1), 1–14 (2005)

    Article  MathSciNet  MATH  Google Scholar 

  10. Bernard, F., Thibault, L.: Uniform prox-regularity of functions and epigraphs in Hilbert spaces. Nonlinear Anal. 60(2), 187–207 (2005)

    Article  MathSciNet  MATH  Google Scholar 

  11. Bernard, F., Thibault, L., Zlateva, N.: Characterizations of prox-regular sets in uniformly convex Banach spaces. J. Convex Anal. 13(3-4), 525–559 (2006)

    MathSciNet  MATH  Google Scholar 

  12. Bernard, F., Thibault, L., Zlateva, N.: Prox-regular sets and epigraphs in uniformly convex Banach spaces: various regularities and other properties. Trans. Amer. Math. Soc. 363(4), 2211–2247 (2011)

    Article  MathSciNet  MATH  Google Scholar 

  13. Bernard, F., Thibault, L., Zagrodny, D.: Integration of primal lower nice functions in Hilbert spaces. J. Optim. Theory Appl. 124(3), 561–579 (2005)

    Article  MathSciNet  MATH  Google Scholar 

  14. Borwein, J.M., Fitzpatrick, S.: Existence of nearest points in Banach spaces. Can. J. Math.(XLI) 4, 702–720 (1989)

    Article  MathSciNet  Google Scholar 

  15. Borwein, J.M., Giles, J.: The proximal normal formula in Banach space. Trans. Amer. Math. Soc. 302(1), 371–381 (1987)

    Article  MathSciNet  MATH  Google Scholar 

  16. Borwein, J.M., Zhu, Q.J.: Techniques of Variational Analysis Canadian Mathematical Society Books in Maths, vol. 20. Springer, New York (2005)

    Google Scholar 

  17. Bougeard, M., Penot, J.-P., Pommellet, A.: Towards minimal assumptions for the infimal convolution regularization. J. Approximation Theory 64(3), 245–272 (1991)

    Article  MathSciNet  MATH  Google Scholar 

  18. Clarke, F.H.: Optimization and Nonsmooth Analysis. Wiley Interscience, New York (1983)

    MATH  Google Scholar 

  19. Clarke, F.H.: Functional Analysis, Calculus of Variations and Optimal Control Graduate Texts in Mathematics, vol. 264. Springer, London (2013)

    Book  Google Scholar 

  20. Clarke, F.H., Stern, R.J., Wolenski, P.R.: Proximal smoothness and the lower-C 2 property. J. Convex Anal. 2(1,2), 117–144 (1995)

    MathSciNet  MATH  Google Scholar 

  21. Colombo, G., Goncharov, V.: Variational inequalities regularity properties of closed sets in Hilbert spaces. J. Convex Anal. 8, 197–221 (2001)

    MathSciNet  MATH  Google Scholar 

  22. Colombo, G., Thibault, L.: Prox-regular sets and applications. Handbook of nonconvex analysis and applications, pp. 99–182. International press, Somerville (2010)

  23. Correa, R., Jofre, A., Thibault, L.: Subdifferential monotonicity as a characterization of convex functions. Numer. Funct. Anal. Optim. 15, 531–535 (1994)

    Article  MathSciNet  MATH  Google Scholar 

  24. Combari, C., Poliquin, R.A., Thibault, L.: Convergence of subdifferentials of convexly composite functions. Canad. J. Math. 51, 250–265 (1999)

    Article  MathSciNet  MATH  Google Scholar 

  25. Daniilidis, A., Georgiev, P.: Approximate convexity and submonotonicity. J. Math. Anal. Appl. 291, 292–301 (2004)

    Article  MathSciNet  MATH  Google Scholar 

  26. Daniilidis, A., Georgiev, P., Penot, J.-P.: Integration of multivalued operators and cyclic submonotonicity. Trans. Amer. Math. Soc. 355, 177–195 (2003)

    Article  MathSciNet  MATH  Google Scholar 

  27. Degiovanni, M., Marino, A., Tosques, M.: Evolution equations with lack of convexity. Nonlinear Anal. 9, 1401–1443 (1985)

    Article  MathSciNet  MATH  Google Scholar 

  28. Ekeland, I.: On the variational principle. J. Math. Anal. Appl. 47, 324–353 (1974)

    Article  MathSciNet  MATH  Google Scholar 

  29. Diestel, J.: Geometry of banach spaces, select topics, lecture notes in math, vol. 485. Springer (1975)

  30. Fabian, M.: Subdifferentiability and trustwothiness in the light of a new variational principle of Borwein and Preiss. Acta Univ. Carolinae 30, 51–56 (1989)

    Google Scholar 

  31. Georgiev, P., Zlateva, N.P.: Reconstruction of the Clarke subdifferential by Lasry-Lions regularizations. J. Math. Anal. Appl. 248, 415–428 (2000)

    Article  MathSciNet  MATH  Google Scholar 

  32. Holmes, R.B.: Geometric Functional Analysis and Its Applications Graduate Texts in Maths, vol. 24. Springer, New York (1975)

    Book  Google Scholar 

  33. Ioffe, A.D.: Subdifferentiability spaces and nonsmooth analysis. Bull. Am. Math. Soc., New Ser. 10, 87–90 (1984)

    Article  MathSciNet  MATH  Google Scholar 

  34. Ioffe, A.D.: On subdifferentiability spaces. New York Acad. Sci. 410, 107–119 (1983)

    Article  MathSciNet  Google Scholar 

  35. Ioffe, A.D.: Proximal analysis and approximate subdifferentials. J. London Math. Soc. 41, 175–192 (1990)

    Article  MathSciNet  MATH  Google Scholar 

  36. Ivanov, M., Zlateva, N.: On the primal lower nice property. C. R. Acad.. Bulgare Sci. 54(11), 5–10 (2001)

    MathSciNet  MATH  Google Scholar 

  37. Jourani, A.: Limit superior of subdifferentials of uniformly convergent functions. Positivity 3, 33–47 (1999)

    Article  MathSciNet  MATH  Google Scholar 

  38. Jourani, A., Thibault, L.: Metric inequality and subdifferential calculus in Banach spaces. Set-valued Anal. 3, 87–100 (1995)

    Article  MathSciNet  MATH  Google Scholar 

  39. Jourani, A., Thibault, L., Zagrodny, D.: C 1,ω-regularity and Lipschitz-like properties of subdifferential. Proc. Lond. Math. Soc. (3) 1, 189–223 (2012)

    Article  MathSciNet  Google Scholar 

  40. Jourani, A., Thibault, L., Zagrodny, D.: Differential properties of the Moreau envelope. J. Funct. Anal. 266(3), 1185–1237 (2014)

    Article  MathSciNet  MATH  Google Scholar 

  41. Kruger, A.Y., Mordukhovich, B.S.: Extremal points the Euler equation in nonsmooth optimization problems. Dokl. Akad Nauk BSSR 24, 684–687 (1980)

    MathSciNet  MATH  Google Scholar 

  42. Lasry, J.-M., Lions, P.-L.: A remark on regularization in Hilbert spaces. Israel J. Math. 55, 257–266 (1986)

    Article  MathSciNet  MATH  Google Scholar 

  43. Levy, A.B., Poliquin, R.A., Thibault, L.: Partial extensions of Attouch’s theorem with applications to proto-derivatives of subgradient mappings. Trans. Amer. Math. Soc. 347(4), 1269–1293 (1995)

    MathSciNet  MATH  Google Scholar 

  44. Lopez, O., Thibault, L.: Sequential formula for subdifferential of upper envelope of convex functions. J. Nonlinear Convex Anal. 14(2), 377–388 (2013)

    MathSciNet  MATH  Google Scholar 

  45. Luc, D.T., Ngai, H.V., Théra, M.: On ε−convexity and ε-monotonicity, in Calculus of Variations and Differential Equations. In: Ioffe, A., Reich, S., Shafrir, I. (eds.) Research Notes in Maths, pp 82–100. Chapman & Hall (1999)

  46. Marcellin, S., Thibault, L.: Evolution problems associated with primal lower nice functions. J. Convex Anal. 13(2), 385–421 (2006)

    MathSciNet  MATH  Google Scholar 

  47. Marino, A., Tosques, M.: Some variational problems with lack of convexity and some partial differential inequalities, Methods of Nonconvex Analysis, Lect. 1st Sess. CIME, Varenna/Italy 1989. Lect. Notes Math. 1446, 58–83 (1990)

    Article  MathSciNet  Google Scholar 

  48. Mazade, M., Thibault, L.: Differential variational inequalities with locally prox-regular sets. J. Convex Anal. 19(4), 1109–1139 (2012)

    MathSciNet  MATH  Google Scholar 

  49. Mazade, M., Thibault, L.: Regularization of differential variational inequalities with locally prox-regular sets. Math. Program. 139(1–2), 243–269 (2013). Ser. B

    Article  MathSciNet  MATH  Google Scholar 

  50. Mazade, M., Thibault, L.: Primal Lower Nice Functions and Their Moreau Envelopes. Computational and Analytical Mathematics, 521–553, Springer Proc. Math Stat., vol. 50. Springer, New York (2013)

    Google Scholar 

  51. Moreau, J.-J.: Proximité et dualité dans un espace hilbertien. Bull. Soc. Math. France 93, 273–299 (1965)

    MathSciNet  MATH  Google Scholar 

  52. Mordukhovich, B.S., Shao, Y.: Nonsmooth sequential analysis in Asplund spaces. Trans. Amer. Math. Soc. 348(4), 1235–1280 (1996)

    Article  MathSciNet  MATH  Google Scholar 

  53. Mordukhovich, B.: Variational analysis and generalized differentiation. I. Basic Theory Grundlehren Der Mathematischen Wissenschaften [Fundamental Principles of Mathematical Sciences], vol. 330. Springer, Berlin (2006)

    Google Scholar 

  54. Mordukhovich, B.: Variational analysis and generalized differentiation. II. Applications. Grundlehren Der Mathematischen Wissenschaften [Fundamental Principles of Mathematical Sciences], vol. 331. Springer, Berlin (2006)

    Google Scholar 

  55. Ngai, H.V., Luc, D.T., Théra, M.: Approximate convex functions. J. Nonlinear and Convex Anal. 1(2), 155–176 (2000)

    MathSciNet  MATH  Google Scholar 

  56. Ngai, H.V., Penot, J.-P.: Approximately convex functions and approximately monotone operators. Nonlinear Anal. 66, 547–564 (2007)

    Article  MathSciNet  MATH  Google Scholar 

  57. Ngai, H.V., Penot, J.-P.: Paraconvex functions and paraconvex sets. Stud. Math. 184(1), 1–29 (2008)

    Article  MathSciNet  MATH  Google Scholar 

  58. Ngai, H.V., Penot, J.-P.: Approximately convex sets. J. Nonlinear and Convex Anal. 8(3), 337–371 (2007)

    MathSciNet  MATH  Google Scholar 

  59. Ngai, H., Théra, M.: Metric inequality, subdifferential calculus and applications. Set-Valued Anal. 9, 187–216 (2001)

    Article  MathSciNet  MATH  Google Scholar 

  60. Penot, J.-P.: Proximal Mappings. J. Approx. Theory 94, 203–221 (1998)

    Article  MathSciNet  MATH  Google Scholar 

  61. Penot, J.-P.: Favorable classes of mappings and multimappings in nonlinear analysis and optimization. J. Convex Analysis 3, 97–116 (1996)

    MathSciNet  MATH  Google Scholar 

  62. Penot, J.-P.: Calmness and stability properties of marginal and performance functions. Numer. Functional Anal. Optim. 25(3–4), 287–308 (2004)

    MathSciNet  MATH  Google Scholar 

  63. Penot, J.-P.: Differentiability properties of optimal value functions. Canadian J. Math. 56(4), 825–842 (2004)

    Article  MathSciNet  MATH  Google Scholar 

  64. Penot, J.-P.: Softness, sleekness and regularity properties in nonsmooth analysis. Nonlinear Anal. 68(9), 2750–2768 (2008)

    Article  MathSciNet  MATH  Google Scholar 

  65. Penot, J.-P.: Calculus without Derivatives Graduate Texts in Mathematics, vol. 266. Springer, New York (2013)

    Book  Google Scholar 

  66. Penot, J.-P.: Analysis. From Concepts to Applications, Universitext. Springer, London. (to appear)

  67. Penot, J.-P., Ratsimahalo, R.: On the Yosida approximation of operators. Proc. Royal Soc. Edinburg 131A, 945–966 (2001)

    Article  MathSciNet  Google Scholar 

  68. Phelps, R.R.: Convex Functions, Monotone Operators and Differentiability, Lect. Notes in Math., vol. 1364. Springer, Berlin (1993). (second edition)

    Google Scholar 

  69. Poliquin, R.A.: Integration of subdifferentials of nonconvex functions. Nonlinear Anal. 17, 385–398 (1991)

    Article  MathSciNet  MATH  Google Scholar 

  70. Poliquin, R.A.: An extension of Attouch’s theorem and its application to second-order epi-differentiation of convexly composite functions. Trans. Amer. Math. Soc. 322, 861–874 (1991)

    MathSciNet  Google Scholar 

  71. Poloquin, R.A., Rockafellar, R.T.: Prox-regular functions in variational analysis 348, 1805–1818 (1995)

    Google Scholar 

  72. Poloquin, R.A., Rockafellar, R.T., Thibault, L.: Local differentiability of distance functions. Trans. Amer. Math. Soc. 307, 5231–5249 (2000)

    Article  Google Scholar 

  73. Rockafellar, R., Wets, R.J.-B.: Variational Analysis, Grundlehren Der Mathematishen Wissenschaften, vol. 317. Springer, Berlin (2002)

    Google Scholar 

  74. Rolewicz, S.: On the coincidence of some subdifferentials in the class of α(⋅)-paraconvex functions. Optimization 50, 353–360 (2001)

    Article  MathSciNet  MATH  Google Scholar 

  75. Spingarn, J.E.: Submonotone subdifferentials of Lipschitz functions. Trans. Amer. Math. Soc. 264, 77–89 (1981)

    Article  MathSciNet  MATH  Google Scholar 

  76. Sebbah, M., Thibault, L.: Metric projection and compatibly parameterized families of prox-regular sets in Hilbert space. Nonlinear Anal. 75(3), 1547–1562 (2012)

    Article  MathSciNet  MATH  Google Scholar 

  77. Serea, O., Thibault, L.: Primal-lower-nice property of value functions in optimization and control problems. Set-valued Var. Anal. 18(3–4), 569–600 (2010)

    Article  MathSciNet  MATH  Google Scholar 

  78. Thibault, L., Zagrodny, D.: Integration of subdifferentials of lower semicontinuous functions on Banach spaces. J. Math. Anal. Appl. 189, 33–58 (1995)

    Article  MathSciNet  MATH  Google Scholar 

  79. Vial, J.-P.: Strong and weak convexity of sets and functions. Math. Oper. Research 8(2), 231–259 (1983)

    Article  MathSciNet  MATH  Google Scholar 

  80. Xu, Z.-B., Roach, G.F.: Characteristic inequalities of uniformly convex and uniformly smooth Banach spaces. J. Math. Anal. Appl. 157, 189–210 (1991)

    Article  MathSciNet  MATH  Google Scholar 

  81. Zalinescu, C.: Convex Analysis in General Vector Spaces. World Scientific, Singapore (2002)

    Book  MATH  Google Scholar 

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Correspondence to Jean-Paul Penot.

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Van Ngai, H., Penot, JP. Subdifferentiation of Regularized Functions. Set-Valued Var. Anal 24, 167–189 (2016). https://doi.org/10.1007/s11228-016-0367-6

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