Systems of equations in differentials with generalised derivatives of continuous functions

Authors

  • Anastasia I. Zhuk Brest State Technical University, 267 Maskowskaja Street, Brest 224023, Belarus
  • Helena N. Zashchuk Brest State Technical University, 267 Maskowskaja Street, Brest 224023, Belarus

Keywords:

algebra of new generalised functions, differential equations with generalised coefficients, functions of finite variation

Abstract

Herein, we investigate systems of nonautonomous differential equations with generalised coefficients using the algebra of new generalised functions. We consider a system of nonautonomous differential equations with generalized coefficients as a system of equations in differentials in the algebra of new generalised functions. The solution of such a system is a new generalised function. It is shown that the different interpretations of the solutions of the given systems can be described by a unique approach of the algebra of new generalised functions. In this paper, for the first time in the literature, we describe associated solutions of the system of nonautonomous differential equations with continuous generalized coefficients in the space L(T).

Author Biographies

  • Anastasia I. Zhuk, Brest State Technical University, 267 Maskowskaja Street, Brest 224023, Belarus

    PhD (physics and mathematics), docent; associate professor at the department of higher mathematics, faculty of electronic informational systems

  • Helena N. Zashchuk, Brest State Technical University, 267 Maskowskaja Street, Brest 224023, Belarus

    PhD (physics and mathematics), docent; associate professor at the department of higher mathematics, faculty of electronic informational systems

References

  1. Antosik P, Legeza J. Products of measures and functions of finite variations. In: Proceedings of the International conference on generalized functions and operational calculus; 29 September – 6 October 1975; Varna, Bulgaria. Sophia: Bulgarian Academy of Sciences; 1979. p. 20–26.
  2. Pandit SG, Deo SG. Differential systems involving impulses. Berlin: Springer; 1982. 106 p. (Lecture notes in mathematics; volume 954). DOI: 10.1007/BFb0067476.
  3. Zavalishchin ST, Sesekin AN. Dynamic impulse systems: theory and applications. Dordrecht: Kluwer Academic Publishers; 1997. 271 p. (Mathematics and its applications; volume 394).
  4. Das PC, Sharma RR. Existence and stability of measure differential equations. Czechoslovak Mathematical Journal. 1972;22(1):145–158. DOI: 10.21136/cmj.1972.101082.
  5. Ligeza J. On generalized solutions of some differential nonlinear equations of order n. Annales Polonici Mathematici. 1975;31(2):115–120. DOI: 10.4064/ap-31-2-115-120.
  6. Лазакович НВ. Стохастические дифференциалы в алгебре обобщенных случайных процессов. Доклады Академии наук БССР. 1994;38(5):23–27.
  7. Жук АИ, Хмызов АК. Системы квазидифференциальных уравнений в прямом произведении алгебр мнемофункций. Симметрический случай. Вестник БГУ. Серия 1, Физика. Математика. Информатика. 2010;2:87–93.
  8. Жук АИ, Яблонский ОЛ. Оценки скорости сходимости к ассоциированным решениям дифференциальных уравнений с обобщенными коэффициентами в алгебре мнемофункций. Доклады Национальной академии наук Беларуси. 2015;59(2):17–22.
  9. Жук АИ, Яблонский ОЛ. Неавтономные системы дифференциальных уравнений в алгебре обобщенных функций. Труды Института математики. 2011;19(1):43–51.
  10. Жук АИ, Яблонский ОЛ, Спасков СА. Ассоциированные решения системы неавтономных дифференциальных уравнений с обобщенными коэффициентами. Смешанный случай. Весцi БДПУ. Серыя 3, Фiзiка. Матэматыка. Iнфарматыка. Бiялогiя. Геаграфiя. 2019;4:16–22.
  11. Zhuk АI, Zashchuk HN. On associated solutions of the system of non-autonomous differential equations in the Lebesgue spaces. Journal of the Belarusian State University. Mathematics and Informatics. 2022;1:6–13. DOI: 10.33581/2520-6508-2022-1-6-13.
  12. Каримова ТИ, Яблонский ОЛ. Об ассоциированных решениях нестационарных систем уравнений в дифференциалах в алгебре обобщенных случайных процессов. Вестник БГУ. Серия 1, Физика. Математика. Информатика. 2009;2:81–86.
  13. Groh J. A nonlinear Volterra – Stieltjes integral equation and a Gronwall inequality in one dimension. Illinois Journal of Mathematics. 1980;24(2):244–263. DOI: 10.1215/ijm/1256047720.
  14. Жук АИ, Яблонский ОЛ. Системы дифференциальных уравнений в алгебре обобщенных функций. Весці Нацыянальнай акадэміі навук Беларусі. Серыя фізіка-матэматычных навук. 2011;1:12–16.

Downloads

Published

2024-12-04

How to Cite

[1]
Zhuk, A.I. and Zashchuk, H.N. 2024. Systems of equations in differentials with generalised derivatives of continuous functions. Journal of the Belarusian State University. Mathematics and Informatics. 3 (Dec. 2024), 22–30.