Results 31 to 40 of about 8,003 (143)

Boundary value problems for singular second order equations

open access: yesFixed Point Theory and Applications, 2018
We investigate strongly nonlinear differential equations of the type (Φ(k(t)u′(t)))′=f(t,u(t),u′(t)),a.e. on [0,T], $$\bigl(\Phi \bigl(k(t) u'(t) \bigr) \bigr)'= f \bigl(t,u(t),u'(t) \bigr), \quad\text{a.e. on } [0,T], $$ where Φ is a strictly increasing
Alessandro Calamai   +2 more
doaj   +1 more source

Existence Theorems on Solvability of Constrained Inclusion Problems and Applications

open access: yesAbstract and Applied Analysis, 2018
Let X be a real locally uniformly convex reflexive Banach space with locally uniformly convex dual space X⁎. Let T:X⊇D(T)→2X⁎ be a maximal monotone operator and C:X⊇D(C)→X⁎ be bounded and continuous with D(T)⊆D(C).
Teffera M. Asfaw
doaj   +1 more source

Existence of periodic solutions of the FitzHugh-Nagumo equations for an explicit range of the small parameter

open access: yes, 2016
The FitzHugh-Nagumo model describing propagation of nerve impulses in axon is given by fast-slow reaction-diffusion equations, with dependence on a parameter $\epsilon$ representing the ratio of time scales.
Czechowski, Aleksander   +1 more
core   +1 more source

Image Restoration Based on Stochastic Resonance in a Parallel Array of Fitzhugh–Nagumo Neuron

open access: yesComplexity, 2020
The poor denoising effect for noisy grayscale images with traditional processing methods would be obtained under strong noise condition, and some image details would be lost.
Huage Zhang   +4 more
doaj   +1 more source

A step beyond Tsallis and Renyi entropies [PDF]

open access: yes, 2005
Tsallis and R\'{e}nyi entropy measures are two possible different generalizations of the Boltzmann-Gibbs entropy (or Shannon's information) but are not generalizations of each others.
Abe   +15 more
core   +1 more source

Nagumo conditions for systems of second-order differential equations

open access: yesJournal of Mathematical Analysis and Applications, 1985
The existence of solutions for the boundary value problem \[ (1)\quad x''(t)+f(t,x(t),x'(t))=0,\quad t\in [a,b],\quad x(a)=A,\quad x(b)=B \] where x takes values in a Hilbert space H and f:[a,b]\(\times H\times H\times H\to H\) is a compact mapping, is studied.
openaire   +1 more source

Positive Invariance Condition for Continuous Dynamical Systems Based on Nagumo Theorem

open access: yes, 2022
In this paper, we obtain sufficient and necessary conditions of some classical convex sets as positively invariant sets for a continuous dynamical system, namely positive invariance conditions. The approach is based on Nagumo Theorem by deriving the tangent cones of these sets.
openaire   +2 more sources

Heterogeneous Delays in Neural Networks

open access: yes, 2014
We investigate heterogeneous coupling delays in complex networks of excitable elements described by the FitzHugh-Nagumo model. The effects of discrete as well as of uni- and bimodal continuous distributions are studied with a focus on different ...
A. Keane   +36 more
core   +1 more source

Dynamical mechanism of anticipating synchronization in excitable systems [PDF]

open access: yes, 2004
We analyze the phenomenon of anticipating synchronization of two excitable systems with unidirectional delayed coupling which are subject to the same external forcing.
A. Hodgkin   +9 more
core   +2 more sources

On radially symmetric solutions of the Neumann boundary value problem for the p-Laplace equation

open access: yesУчёные записки Казанского университета: Серия Физико-математические науки
The Neumann boundary value problem for the p-Laplace equation with a low order term that does not satisfy the Bernstein–Nagumo condition was studied. The solvability of the problem in the class of radially symmetric solutions was investigated. A class of
A. S. Tersenov, R. C. Safarov
doaj   +1 more source

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