Results 11 to 20 of about 609,806 (243)

A Note on Coincidence Degree Theory [PDF]

Abstract and Applied Analysis, 2012
The background of definition of coincidence degree is explained, and some of its basic properties are given.
Ali Sırma, Sebaheddin Ṣevgin
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First Response

Artnodes, 2021
The Covid-19 pandemic, which manifested itself during the early months of 2020, resulted in the activation of the expected official actors on a national and international level in policy, politics, the industrial military complex, pharma and medicine ...
Laura Benítez Valero, Erich Berger
doaj   +2 more sources

Structure of the Fixed Point of Condensing Set-Valued Maps [PDF]

Mathematics Interdisciplinary Research, 2020
In this paper, we present structure of the fixed point set results for condensing set-valued map. Also, we prove a generalization of the Krasnosel'skii-Perov connectedness principle to the case of condensing set-valued maps.
Zeinab Soltani
doaj   +1 more source

Periodic Third-Order Problems with a Parameter

Axioms, 2021
This work concerns with the solvability of third-order periodic fully problems with a weighted parameter, where the nonlinearity must verify only a local monotone condition and no periodic, coercivity or super or sublinearity restrictions are assumed, as
Feliz Minhós, Nuno Oliveira
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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
Hu, Shouchuan, Papageorgiou, Nikolaos S.
openaire   +1 more source

The preventive and therapeutic role of physical activity in knee osteoarthritis

Reumatismo, 2022
The aim of this narrative review is to discuss the results of studies investigating the role of physical activity in knee osteoarthritis (OA). We also formulated two evidence-based exercise programs that could be prescribed to patients with symptomatic ...
R. Restuccia, D. Ruggieri, L. Magaudda, R. Talotta   +3 more
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, Klun Giuliano, Sfecci Andrea   +2 more
doaj   +1 more source

Ambrosetti–Prodi Alternative for Coupled and Independent Systems of Second-Order Differential Equations

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

Remarks on the Degree Theory

Journal of Functional Analysis, 1994
The authors present a unified approach to the notion of degree for rectifiable currents and for approximately differentiable mappings with an \(L^ 1\) Jacobian determinant. Let \(T = \tau({\mathcal M}, \theta, {\mathbf T})\) be a rectifiable \(n\)-dimensional current in \(\mathbb{R}^ k \times \mathbb{R}^ n\), call \(\pi : \mathbb{R}^ k \times \mathbb{R}
GIAQUINTA, MARIANO, MODICA, GIUSEPPE, J. SOUCEK   +2 more
openaire   +4 more sources