Continuity and Differentiability of Solutions with Respect to Initial Conditions and Peano Theorem for Uncertain Differential Equations

Document Type : Original Scientific Paper

Authors

Department of Mathematics, Azarbaijan Shahid Madani University, Tabriz, I. R. Iran

Abstract

 In this paper we study the dependence of solutions of uncertain initial value problems (UIVP) on the initial values. Introducing a contraction mapping and using Banach Fixed Point Theorem (BFPT), the existence and uniqueness (EaU) of solutions of the UIVP will be proven. We show that under appropriate assumptions, the solutions of UIVP are continues and differentiable with respect to initial conditions (ICs). The paper will be ended by proving a theorem about the existence of solutions of an autonomous UIVP under weaker conditions. This theorem is a generalization of Peano
Theorem to UDEs.

Keywords


[1] B. Liu, Uncertainty Theory, 2nd ed., Springer-Verlag, Berlin, 2007.
[2] K.Yao,
Uncertain Differential Equations, 1st ed., Springer-Verlag, Berlin, 2016.
[3] X. Chen and B. Liu, Existence and uniqueness theorem for uncertain differential equations,
Fuzzy Optim. Decis. Making 9 (1) (2010) 69 - 81.
[4] X. Ji and J. Zhou, Multi-dimensional uncertain differential equation: Existence and uniqueness of solution,
Fuzzy Optim. Decis. Making 14 (4) (2015) 477 - 491.
[5] Y. Gao, Existence and uniqueness theorem on uncertain differential equations with local Lipschitz condition,
J. Uncertain Syst. 6 (3) (2012) 223 - 232.
[6] V. Roomi and H. R. Ahmadi, Existence and uniqueness of solutions of uncertain linear systems,
Comput. Methods Differ. Equ. 9 (1) (2019) 1 - 11.
[7] V. Roomi and H. R. Ahmadi, The Liouville Formula for the Uncertain Homogeneous Linear System and Explicit Solutions of the System,
Differ. Equ. Dyn. Syst. (2021).
[8] B. Liu,
Fuzzy process, hybrid process and uncertain process, J. Uncertain Syst. 2 (1) (2008) 3 - 16.
[9] B. Liu, Some research problems in uncertainty theory,
J. Uncertain Syst. 3 (1) (2009) 3 - 10.
[10] R. F. Brown,
Fixed Point Theory and Its Applications, Contemp. Math. (Berkeley, CA, 1986), vol. 72, Amer. Math. Soc., Providence, RI, 1988.
[11] H. L. Royden and P. M. Fitzpatrick,
Real Analysis, 4st ed., China Machine Press, China, 2010.