Results 11 to 20 of about 4,816,964 (328)
Generalizations of Browder's Degree Theory [PDF]
Transactions of the American Mathematical Society, 1995 The starting point of this paper is the recent important work of F. E. Browder, who extended degree theory to operators of monotone type. The degree function of Browder is generalized to maps of the form T + f + G T + f + G , where T T is maximal monotone, f f is ...
Hu, Shouchuan, Papageorgiou, Nikolaos S.
openaire +1 more source
Coupled systems with Ambrosetti-Prodi-type differential equations
AIMS Mathematics, 2023 In this paper, we consider some boundary value problems composed by coupled systems of second-order differential equations with full nonlinearities and general functional boundary conditions verifying some monotone assumptions.
F. Minhós, F. Carapau, G. Rodrigues
doaj +1 more source
Bifurcation Results for Periodic Third-Order Ambrosetti-Prodi-Type Problems
Axioms, 2022 This paper presents sufficient conditions for the existence of a bifurcation point for nonlinear periodic third-order fully differential equations. In short, the main discussion on the parameter s about the existence, non-existence, or the multiplicity ...
Feliz Minhós, Nuno Oliveira
doaj +1 more source
Well-Ordered and Non-Well-Ordered Lower and Upper Solutions for Periodic Planar Systems
Advanced Nonlinear Studies, 2021 The aim of this paper is to extend the theory of lower and upper solutions to the periodic problem associated with planar systems of differential equations.
Fonda Alessandro +2 more
doaj +1 more source
Coexistence of an unstirred chemostat model with B-D functional response by fixed point index theory
Journal of Inequalities and Applications, 2016 This paper deals with an unstirred chemostat model with the Beddington-DeAngelis functional response. First, some prior estimates for positive solutions are proved by the maximum principle and the method of upper and lower solutions.
Xiao-zhou Feng +2 more
doaj +1 more source
, 2015 String structures in degree four are associated with cancellation of anomalies of string theory in ten dimensions. Fivebrane structures in degree eight have recently been shown to be associated with cancellation of anomalies associated to the NS5-brane ...
Sati, Hisham
core +1 more source
Degree Theory of Immersed Hypersurfaces [PDF]
Memoirs of the American Mathematical
Society, 2020 Complete revision. We've worked hard to make the text clearer and we hope the reader will notice the difference. Shorter and more conceptual proofs. The applications, we hope, are much clearer. In addition, we develop a new concept of "weakly smooth manifolds".
Rosenberg, Harold, Smith, Graham
openaire +2 more sources
Shooting with degree theory: Analysis of some weighted poly-harmonic systems [PDF]
, 2014 In this paper, the author establishes the existence of positive entire solutions to a general class of semilinear poly-harmonic systems, which includes equations and systems of the weighted Hardy--Littlewood--Sobolev type.
Villavert, John
core +1 more source
Mathematical Biosciences and Engineering, 2023 The existence and finite-time stability (FTS) of equilibrium point (EP) for a kind of inertial neural networks (INNS) with varying-time delays is studied. Firstly, by adopting the degree theory and the maximum-valued method, a sufficient condition in the
Huaying Liao, Zhengqiu Zhang
doaj +1 more source
Mathematics, 2023 This paper deals with two types of systems of second-order differential equations with parameters: coupled systems with the boundary conditions of the Sturm–Liouville type and classical systems with Dirichlet boundary conditions.
Feliz Minhós, Gracino Rodrigues
doaj +1 more source