Results 1 to 10 of about 192,749 (224)

Almost‐periodicity in linear topological spaces and applications to abstract differential equations [PDF]

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1982
Let E be a complete locally convex space (l.c.s.) and f : R → E a continuous function; then f is said to be almost‐periodic (a.p.) if, for every neighbourhood (of the origin in E) U, there exists ℓ = ℓ(U) > 0 such that every interval [a, a + ℓ] of the real line contains at least one τ point such that f(t + τ) − f(t) ∈ U for every t ∈ R.
Gaston Mandata N'Guerekata
openaire   +2 more sources

Integro-differential equations with bounded operators in Banach spaces [PDF]

open access: yesҚарағанды университетінің хабаршысы. Математика сериясы, 2022
The paper investigates integro-differential equations in Banach spaces with operators, which are a composition of convolution and differentiation operators.
V.E. Fedorov, A.D. Godova, B.T. Kien
doaj   +3 more sources

Hölder regularity for abstract semi-linear fractional differential equations in Banach spaces

open access: yesComputers & Mathematics with Applications, 2021
Producción ...
Cuesta Montero, Eduardo, Ponce, Rodrigo
openaire   +1 more source

A Class of Quasilinear Equations with Riemann–Liouville Derivatives and Bounded Operators

open access: yesAxioms, 2022
The existence and uniqueness of a local solution is proved for the incomplete Cauchy type problem to multi-term quasilinear fractional differential equations in Banach spaces with Riemann–Liouville derivatives and bounded operators at them.
Vladimir E. Fedorov   +2 more
doaj   +1 more source

Shifted ultraspherical pseudo-Galerkin method for approximating the solutions of some types of ordinary fractional problems

open access: yesAdvances in Difference Equations, 2021
In this work, a technique for finding approximate solutions for ordinary fraction differential equations (OFDEs) of any order has been proposed. The method is a hybrid between Galerkin and collocation methods.
Mohamed Abdelhakem   +3 more
doaj   +1 more source

Linear Inverse Problems for Multi-term Equations with Riemann — Liouville Derivatives

open access: yesИзвестия Иркутского государственного университета: Серия "Математика", 2021
The issues of well-posedness of linear inverse coefficient problems for multi-term equations in Banach spaces with fractional Riemann – Liouville derivatives and with bounded operators at them are considered. Well-posedness criteria are obtained both for
M. M. Turov, V.E. Fedorov, B.T. Kien
doaj   +1 more source

On the Solvability of Equations with a Distributed Fractional Derivative Given by the Stieltjes Integral

open access: yesMathematics, 2022
Linear equations in Banach spaces with a distributed fractional derivative given by the Stieltjes integral and with a closed operator A in the right-hand side are considered. Unlike the previously studied classes of equations with distributed derivatives,
Sergey M. Sitnik   +3 more
doaj   +1 more source

A priori bounds of the solution of a one point IBVP for a singular fractional evolution equation

open access: yesAdvances in Difference Equations, 2020
A priori bounds constitute a crucial and powerful tool in the investigation of initial boundary value problems for linear and nonlinear fractional and integer order differential equations in bounded domains.
Said Mesloub, Hassan Eltayeb Gadain
doaj   +1 more source

Existence of Pseudo Almost Periodic Solutions to Some Classes of Partial Hyperbolic Evolution Equations [PDF]

open access: yes, 2006
The paper examines the existence of pseudo almost periodic solutions to some classes of partial hyperbolic evolution equations. Namely, sufficient conditions for the existence and uniqueness of pseudo almost periodic solutions to those classes of ...
Diagana, Toka
core   +4 more sources

Existence results for neutral evolution equations with nonlocal conditions and delay via fractional operator

open access: yesOpen Mathematics, 2022
In this paper, we study the existence of solutions for the neutral evolution equations with nonlocal conditions and delay in α\alpha -norm, which are more general than in many previous publications.
Zhang Xuping, Sun Pan
doaj   +1 more source

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