List All News Articles# Department of Mathematics - Research Spotlight

Published Date: **Wednesday, 31 March 2021**

Research Article: “Stability of Ulam-Hyers and Existence of Solutions for Impulsive Time-Delay Semi-Linear Systems with Non-Permutable Matrices"- Mathematics, MDPI — 2 September 2020

Authors: Prof. Dr. NAZIM MAHMUDOV, AMAL M. ATA ALMATARNEH

"In this paper, the stability of Ulam–Hyers and existence of solutions for semi-linear time-delay systems with linear impulsive conditions are studied. The linear parts of the impulsive systems are defined by non-permutable matrices. To obtain solution for linear impulsive delay systems with non-permutable matrices in explicit form, a new concept of impulsive delayed matrix exponential is introduced. Using the representation formula and norm estimation of the impulsive delayed matrix exponential, sufficient conditions for stability of Ulam–Hyers and existence of solutions are obtained."

For more information: https://tinyurl.com/z45s72yj