Results 11 to 20 of about 2,179,018 (268)

On a new critical point theorem and some applications to discrete equations [PDF]

open access: yesOpuscula Mathematica, 2014
Using the Fenchel-Young duality we derive a new critical point theorem. We illustrate our results with solvability for certain discrete BVP. Multiple solutions are also considered.
Marek Galewski, Elżbieta Galewska
doaj   +1 more source

Topology Rule-Based Methodology for Flow Separation Analysis in Turbomachinery

open access: yesInternational Journal of Turbomachinery, Propulsion and Power, 2022
Boundary-layer flow separation is a common flow feature in many engineering applications. The consequences of flow separation in turbomachinery can be disastrous in terms of performance, stability and noise.
Pierre Duquesne   +3 more
doaj   +1 more source

QCD critical point: Recent developments [PDF]

open access: yesEPJ Web of Conferences
Recent developments aimed at mapping QCD phase diagram and the search for the QCD critical point in heavy-ion collisions are briefly reviewed.
Stephanov Mikhail
doaj   +1 more source

New Generalized Ekeland’s Variational Principle, Critical Point Theorems and Common Fuzzy Fixed Point Theorems Induced by Lin-Du’s Abstract Maximal Element Principle

open access: yesAxioms, 2021
In this paper, by applying the abstract maximal element principle of Lin and Du, we present some new existence theorems related with critical point theorem, maximal element theorem, generalized Ekeland’s variational principle and common (fuzzy) fixed ...
Junjian Zhao, Wei-Shih Du
doaj   +1 more source

Critical point theorems

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2002
Let H be a Hilbert space such that H=V⊕W, where V and W are two closed subspaces of H. We generalize an abstract theorem due to Lazer et al. (1975) and a theorem given by Moussaoui (1990-1991) to the case where V and W are not necessarily finite ...
H. Boukhrisse, M. Moussaoui
doaj   +1 more source

Remarks on some fourth-order boundary value problems with non-monotone increasing eigenvalue sequences

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2016
By $Z_{2}$-index theory, the existence and multiplicity of solutions for some fourth-order boundary value problems $$ \begin{cases} u^{(4)}+au''=\mu u+F_{u}(t,u ...
Chengyue Li, Yuhan Wu
doaj   +1 more source

UNCONVENTIONAL QUANTUM CRITICAL POINTS [PDF]

open access: yesInternational Journal of Modern Physics B, 2012
In this paper we review the theory of unconventional quantum critical points that are beyond the Landau's paradigm. Three types of unconventional QCPs will be discussed: (1) The transition between topological order and semiclassical spin ordered phase; (2) The transition between topological order and valence bond solid phase; (3) The direct second ...
openaire   +3 more sources

The Assessment of Level of Flash Floods Threat of Urbanised Areas

open access: yesActa Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 2017
Flash floods (or torrential rain flooding) is another type of flood hazard which has caused casualties and significant property damages. A methodology for identification of urban areas, which can potentially be burdened by that type of flood hazard, was ...
Pavla Štěpánková   +2 more
doaj   +1 more source

Existence results for a sublinear second order Dirichlet boundary value problem on the half-line [PDF]

open access: yesOpuscula Mathematica, 2020
In this paper we study the existence of nontrivial solutions for a boundary value problem on the half-line, where the nonlinear term is sublinear, by using Ekeland's variational principle and critical point theory.
Dahmane Bouafia, Toufik Moussaoui
doaj   +1 more source

Spectrum Curves for Sturm–Liouville Problem with Integral Boundary Condition

open access: yesMathematical Modelling and Analysis, 2015
We consider Sturm–Liouville problem with one integral type nonlocal boundary condition depending on three parameters γ (multiplier in nonlocal condition), ξ1, ξ2 ([ξ1, ξ2] is a domain of integration).
Agnė Skučaitė, Artūras Štikonas
doaj   +1 more source

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