Results 21 to 30 of about 238,303 (293)
Singular boundary value problem on infinite time scale
Discrete Dynamics in Nature and Society, 2006 This paper deals with a class of singular boundary value problems of differential equations on infinite time scale. An existence theorem of positive solutions is established by using the Schauder fixed point theorem and perturbation and operator ...
Zhao-Cai Hao, Jin Liang, Ti-Jun Xiao
doaj +2 more sources
Existence of two solutions for singular Φ-Laplacian problems
Advanced Nonlinear Studies, 2022 Existence of two solutions to a parametric singular quasi-linear elliptic problem is proved. The equation is driven by the Φ\Phi -Laplacian operator, and the reaction term can be nonmonotone.
Candito Pasquale +2 more
doaj +1 more source
Electronic Journal of Qualitative Theory of Differential Equations, 2023 In this note we prove the existence of mild solutions for nonlocal problems governed by semilinear second order differential inclusions which involves a nonlinear term driven by an operator.
Tiziana Cardinali, Giulia Duricchi
doaj +1 more source
A Local limit theorem for directed polymers in random media: the continuous and the discrete case [PDF]
, 2005 In this article, we consider two models of directed polymers in random environment: a discrete model and a continuous model. We consider these models in dimension greater or equal to 3 and we suppose that the normalized partition function is bounded in L^
Vargas, Vincent
core +6 more sources
Boundary Value Problems, 2018 We consider a one-dimensional perturbation of the convolution integro-differential operator of arbitrary order on a finite interval. The inverse problem of recovering the convolution component from the spectrum is studied, provided that the perturbation ...
S. A. Buterin, S. V. Vasiliev
doaj +1 more source
Infinitely many solutions for a gauged nonlinear Schrödinger equation with a perturbation
Nonlinear Analysis, 2021 In this paper, we use the Fountain theorem under the Cerami condition to study the gauged nonlinear Schrödinger equation with a perturbation in R2. Under some appropriate conditions, we obtain the existence of infinitely many high energy solutions for ...
Jiafa Xu, Jie Liu, Donal O'Regan
doaj +1 more source
Elementary theorems regarding blue isocurvature perturbations
Physical Review D, 2015 Blue CDM-photon isocurvature perturbations are attractive in terms of observability and may be typical from the perspective of generic mass relations in supergravity. We present and apply three theorems useful for blue isocurvature perturbations arising from linear spectator scalar fields.
Chung, Daniel J. H., Yoo, Hojin
openaire +3 more sources
International Journal of Mathematics and Mathematical Sciences, 2004 We extend the Putnam-Fuglede theorem and the second-degree Putnam-Fuglede theorem to the nonnormal operators and to an elementary operator under perturbation by quasinilpotents. Some asymptotic results are also given.
Yin Chen
doaj +1 more source
An Interpolation Theorem with Perturbed Continuity
Journal of Functional Analysis, 2002 Let \((A_0,A_1)\) and \((B_0,B_1)\) be two interpolation couples and let \(T: (A_0, A_1)\to (B_0, B_1)\) be a \(K\)-quasilinear operator. The boundedness of the operator from \(A_0\) to \(B_0\) implies \(K(t, Ta;B_0,B_1)\leq M_0\|a\|_{A_0}\) and the boundedness of the operator from \(A_1\) to \(B_1\) implies \(K(t,Ta; B_1,B_0)\leq M_1\|a\|_{A_1}\), \(a\
Sagher, Y., Shvartsman, P.
openaire +2 more sources
The Theorems of Perturbative QCD [PDF]
Annual Review of Nuclear and Particle Science, 1987 A review of perturbative QCD results, particularly factorization theorems, from the literature ''for which there is a statement of the result at all orders of perturbation theory and a reasonable approximation to a proof'' is presented. (AIP)
J C Collins, D E Soper
openaire +2 more sources