Results 71 to 80 of about 2,211 (224)

Numerical Treatment of Fixed Point Applied to the Nonlinear Fredholm Integral Equation

open access: yesFixed Point Theory and Applications, 2009
The authors present a method of numerical approximation of the fixed point of an operator, specifically the integral one associated with a nonlinear Fredholm integral equation, that uses strongly the properties of a classical Schauder basis in the Banach
M. I. Berenguer   +3 more
doaj   +2 more sources

Index-like theorem for massless fermions in spherically symmetric monopole backgrounds

open access: yesJournal of High Energy Physics, 2022
In this paper we study massless fermions coupled to spherically symmetric SU(N) monopoles without Yukawa couplings between the Higgs and fermion fields.
T. Daniel Brennan
doaj   +1 more source

Study on Infinitely Many Solutions for a Class of Fredholm Fractional Integro-Differential System

open access: yesFractal and Fractional, 2022
This paper deals with a class of nonlinear fractional Sturm–Liouville boundary value problems. Each sub equation in the system is a fractional partial equation including the second kinds of Fredholm integral equation and the p-Laplacian operator ...
Dongping Li, Yankai Li, Fangqi Chen
doaj   +1 more source

The Effect of Caffeine Consumption and Acute Withdrawal on Resting‐State fMRI Brain Connectivity, Mood and Cognition

open access: yesEuropean Journal of Neuroscience, Volume 63, Issue 8, April 2026.
Habitual and acute caffeine consumption and acute caffeine withdrawal produce distinct alterations in resting‐state fMRI brain connectivity, in regions primarily associated with reward, interoception, emotion regulation, motor function and visual processing.
Tatum Sevenoaks   +5 more
wiley   +1 more source

Toeplitz operators and Wiener-Hopf factorisation: an introduction

open access: yesConcrete Operators, 2017
Wiener-Hopf factorisation plays an important role in the theory of Toeplitz operators. We consider here Toeplitz operators in the Hardy spaces Hp of the upper half-plane and we review how their Fredholm properties can be studied in terms of a Wiener-Hopf
Câmara M. Cristina
doaj   +1 more source

Existence and Spectral Stability Analysis of Viscous‐Dispersive Shock Profiles for Isentropic Compressible Fluids of Korteweg Type

open access: yesStudies in Applied Mathematics, Volume 156, Issue 4, April 2026.
ABSTRACT The system describing the dynamics of a compressible isentropic fluid exhibiting viscosity and internal capillarity in one space dimension and in Lagrangian coordinates, is considered. It is assumed that the viscosity and the capillarity coefficients are nonlinear smooth, positive functions of the specific volume, making the system the most ...
Raffaele Folino   +2 more
wiley   +1 more source

Approximation by Semi-Fredholm Operators [PDF]

open access: yesProceedings of the American Mathematical Society, 1994
We present a simple approach for calculating some known distances from a bounded operator defined on a separable Hilbert space to certain sets related to semi-Fredholm operators.
openaire   +2 more sources

Existence and Stability for Traveling Waves of Fourth‐Order Semilinear Wave and Schrödinger Equations

open access: yesStudies in Applied Mathematics, Volume 156, Issue 4, April 2026.
ABSTRACT We investigate the existence and spectral stability of traveling wave solutions for a class of fourth‐order semilinear wave equations, commonly referred to as beam equations. Using variational methods based on a constrained maximization problem, we establish the existence of smooth, exponentially decaying traveling wave profiles for wavespeeds
Vishnu Iyer   +2 more
wiley   +1 more source

Alternativa de Fredholm para operadores monotonos [PDF]

open access: yes, 1987
Several conditions are imposed on a non-linear operator of a reflexive Banach Space into its dual which allow to establish a Fredholm alternative for such an operator. Then an application is given to a problem in Algebraic GeometrySe dan condiciones para
Sanchez Hernández, Dario   +1 more
core  

Multiple front and pulse solutions in spatially periodic systems

open access: yesJournal of the London Mathematical Society, Volume 113, Issue 4, April 2026.
Abstract In this paper, we develop a comprehensive mathematical toolbox for the construction and spectral stability analysis of stationary multiple front and pulse solutions to general semilinear evolution problems on the real line with spatially periodic coefficients.
Lukas Bengel, Björn de Rijk
wiley   +1 more source

Home - About - Disclaimer - Privacy