Abstract
In the current paper, we deal with a system of G-stochastic differential equations (G-SDEs in short) driven by G-Brownian motion. Under some assumptions on the coefficients, we prove the temporal Hölder regularity of the solution. Moreover, we establish the Pontryagin’s maximum principle for optimal control of such system. An example is given to support the effectiveness of our main results.
REFERENCES
Z. Arab and M. M. El Borai, ‘‘Wellposedness and stability of fractional stochastic nonlinear heat equation in Hilbert space,’’ Fract. Calc. Appl. Anal. 25, 2020–2039 (2022).
A. Bensoussan, ‘‘Lectures on stochastic control,’’ in Nonlinear Filtering and Stochastic Control (Springer, Berlin, 1983).
H. Ben Gherbal, A. Redjil, and O. Kebiri, ‘‘The relaxed maximum principle for G stochastic control systems with controlled jumps,’’ Adv. Math.: Sci. J. 11, 1313–1343 (2022).
F. Biagini, T. Meyer-Brandis, B. Øksendal, and K. Paczka, ‘‘Optimal control with delayed information flow of systems driven by G-Brownian motion,’’ Probab. Uncert. Quant. Risk 3, 8 (2018).
L. Denis, M. Hu, and S. Peng, ‘‘Function spaces and capacity related to a sublinear expectation: Application to G-Brownian motion paths,’’ Potent. Anal. 34, 139–161 (2011).
N. El Karoui, N. Du Hu, and M. Jeanblanc, ‘‘Compactification methods in the control of degenerate diffusions: Existence of an optimal control,’’ Stochastics 20, 169–219 (1987).
W. H. Fleming, ‘‘Generalized solutions in optimal stochastic control,’’ in Differential Games and Control Theory II, Proceedings of 2nd Conference, Univ. of Rhode Island, Kingston, RI, 1976, Lect. Notes Pure Appl. Math. 30, 147–165 (1977).
F. Gao, ‘‘Pathwise properties and homeomorphic flows for stochastic differential equations driven by G-Brownian motion,’’ Stoch. Process. Appl. 119, 3356–3382 (2009).
Y. Hu, Y. Lin, and A. S. Hima, ‘‘Quadratic backward stochastic differential equations driven by G-Brownian motion: Discrete solutions and approximation,’’ Stoch. Process. Appl. 128, 3724–3750 (2018).
M. Hu, S. Ji, S. Peng, and Y. Song, ‘‘Backward stochastic differential equations driven by G-Brownian motion,’’ Stoch. Process. Appl. 124, 759–784 (2014).
Q. Lin, ‘‘Differentiability of stochastic differential equations driven by the G-Brownian motion,’’ Sci. China Math. 56, 1087–1107 (2013).
B. Mezerdi, ‘‘Necessary conditions for optimality for a diffusion with a non-smooth drift,’’ Stochastics 24, 305–326 (1988).
S. Peng, Nonlinear Expectations and Stochastic Calculus under Uncertainty – with Robust CLT and G-Brownian Motion (Springer, Germany, 2019).
A. Redjil and S. E. Choutri, ‘‘On relaxed stochastic optimal control for stochastic differential equations driven by G-Brownian motion,’’ Lat. Am. J. Probab. Math. Stat. 15, 201–212 (2018).
A. Redjil, H. Ben Gherbal, and O. Kebiri, ‘‘Existence of relaxed stochastic optimal control for G-SDEs with controlled jumps,’’ Stoch. Anal. Appl. 41, 115–133 (2021).
A. Redjil and Z. Arab, ‘‘Temporal regularity of stochastic differential equations driven by G-Brownian motion,’’ accepted (2023).
K. Paczka, ‘‘Itô calculus and jump diffusions for G-Lévy processes,’’ arXiv: 1211.2973 (2012).
Funding
This work was supported by ongoing institutional funding. No additional grants to carry out or direct this particular research were obtained.
Author information
Authors and Affiliations
Corresponding authors
Ethics declarations
The authors of this work declare that they have no conflicts of interest.
Additional information
Publisher’s Note.
Pleiades Publishing remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
(Submitted by A. I. Volodin)
Rights and permissions
About this article
Cite this article
Ben Gherbal, H., Redjil, A. & Arab, Z. Regularity and Optimality Necessary Conditions for System of G-Stochastic Differential Equations. Lobachevskii J Math 44, 4630–4642 (2023). https://doi.org/10.1134/S199508022311015X
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S199508022311015X