Zobrazeno 1 - 10
of 247
pro vyhledávání: '"SNEZHANA HRISTOVA"'
Publikováno v:
Axioms, Vol 13, Iss 9, p 605 (2024)
The Cohen–Grossberg neural network is studied in the case when the dynamics of the neurons is modeled by a Riemann–Liouville fractional derivative with respect to another function and an appropriate initial condition is set up. Some inequalities
Externí odkaz:
https://doaj.org/article/5374a7f5669941099fa0297bf0640906
Autor:
Ravi P. Agarwal, Snezhana Hristova
Publikováno v:
AIMS Mathematics, Vol 8, Iss 11, Pp 26801-26820 (2023)
The general delay Hopfield neural network is studied. It is considered the case of time-varying delay, continuously distributed delays, time varying coefficients and a special type of a Riemann-Liouville fractional derivative (GPRLFD) with an exponen
Externí odkaz:
https://doaj.org/article/483bd3237ec44111af12c776b56483e5
Publikováno v:
Mathematics, Vol 12, Iss 11, p 1626 (2024)
Ulam type stability is an important property studied for different types of differential equations. When this type of stability is applied to boundary value problems, there are some misunderstandings in the literature. In connection with this, initia
Externí odkaz:
https://doaj.org/article/91e5cec653e94587b9dcd6231b36afbe
Publikováno v:
Fractal and Fractional, Vol 8, Iss 5, p 259 (2024)
The main goal of the paper is to present and study models of multi-agent systems for which the dynamics of the agents are described by a Caputo fractional derivative of variable order and a kernel that depends on an increasing function. Also, the ord
Externí odkaz:
https://doaj.org/article/97627a573c4446a1981510830f430af7
Publikováno v:
Mathematics, Vol 12, Iss 2, p 233 (2024)
An initial value problem for a scalar nonlinear differential equation with a variable order for the generalized proportional Caputo fractional derivative is studied. We consider the case of a piecewise constant variable order of the fractional deriva
Externí odkaz:
https://doaj.org/article/02196129b165429d80839ee7ce6c56d1
Publikováno v:
Fractal and Fractional, Vol 8, Iss 1, p 11 (2023)
An initial value problem for nonlinear fractional differential equations with a tempered Caputo fractional derivative of variable order with respect to another function is studied. The absence of semigroup properties of the considered variable order
Externí odkaz:
https://doaj.org/article/77290ba266ca4a38a04cc3d022d584d1
Publikováno v:
Fractal and Fractional, Vol 7, Iss 10, p 732 (2023)
Some inequalities for generalized proportional Riemann–Liouville fractional derivatives (RLGFDs) of convex functions are proven. As a special case, inequalities for the RLGFDs of the most-applicable Lyapunov functions such as the ones defined as a
Externí odkaz:
https://doaj.org/article/222a82ea423849c097b995d180d0decc
Autor:
Martin Bohner, Snezhana Hristova
Publikováno v:
Boundary Value Problems, Vol 2022, Iss 1, Pp 1-15 (2022)
Abstract A scalar nonlinear integro-differential equation with time-variable and bounded delays and generalized Caputo proportional fractional derivative is considered. The main goal of this paper is to study the stability properties of the zero solu
Externí odkaz:
https://doaj.org/article/8c3cbdc6fa8240dba87434bc27d8cb38
Publikováno v:
AIMS Mathematics, Vol 7, Iss 2, Pp 2973-2988 (2022)
Riemann-Liouville fractional differential equations with impulses are useful in modeling the dynamics of many real world problems. It is very important that there are good and consistent theoretical proofs and meaningful results for appropriate probl
Externí odkaz:
https://doaj.org/article/05f64be1db184b4bbdeba0e1a9e797a8
Publikováno v:
Studia Universitatis Babeş-Bolyai Negotia, Vol 67, Iss 4 (2022)
Nowadays, businesses are required to create added value and difference. In recent years, the synergy perspective grew into one of the main concerns of corporate and strategic management. It creates a new path for change in the way of designing the bu
Externí odkaz:
https://doaj.org/article/d08b8ea6af0c4cbe87a563d6e4403a8f