Results 91 to 100 of about 292,102 (216)

Variational Methods and Critical Point Theory

open access: yesAbstract and Applied Analysis, 2012
M. Victoria Otero-Espinar   +3 more
doaj   +1 more source

Parameter-Free Selective Segmentation With Convex Variational Methods. [PDF]

open access: yesIEEE Trans Image Process, 2019
Spencer J, Chen K, Duan J.
europepmc   +1 more source

A discontinuous problem involving the p-Laplacian operator and critical exponent in $mathbb{R}^N$

open access: yesElectronic Journal of Differential Equations, 2003
Using convex analysis, we establish the existence of at least two nonnegative solutions for the quasilinear problem $$ -Delta_{p}u=H(u-a)u^{p^*-1} +lambda h(x)quadhbox{in }mathbb{R}^N $$ where $Delta_{p}u$ is the $p$-Laplacian operator, $H$ is the ...
Claudianor Oliveira Alves   +1 more
doaj  

Existence of solutions to nonlocal elliptic equations with discontinuous terms

open access: yesElectronic Journal of Differential Equations, 2012
In this article, we study the existence of nonnegative solutions for the elliptic partial differential equation $$displaylines{ -[M(|u|^{p}_{1,p})]^{1,p}Delta_{p}u = f(x,u) quadhbox{in } Omega , cr u = 0 quadhbox{on } partialOmega , }$$ where ...
Francisco Julio S. A. Correa   +1 more
doaj  

Existence and concentration of positive bound states for Schrodinger-Poisson systems with potential functions

open access: yesElectronic Journal of Differential Equations, 2015
In this article we study the existence and concentration behavior of bound states for a nonlinear Schrodinger-Poisson system with a parameter $\varepsilon>0$.
Patricia L. Cunha
doaj  

Homoclinic solutions for a class of second-order Hamiltonian systems with locally defined potentials

open access: yesElectronic Journal of Differential Equations, 2017
In this article, we establish sufficient conditions for the existence of homoclinic solutions for a class of second-order Hamiltonian systems $$ \ddot u(t)-L(t)u(t)+\nabla W\bigl(t,u(t)\bigr)=f(t), $$ where L(t) is a positive definite symmetric ...
Xiang Lv
doaj  

A Variational Method for Curve Extraction

open access: yes
We propose a functional for extracting curves between a list of possible endpoints, based on a discretization of a variational energy and Smirnov's decomposition theorem for vector fields. It is then used to design a bi-level minimization approach to automatically extract curves and 1D structures from an image, which is mostly unsupervised.
Arthaud, Majid   +2 more
openaire   +2 more sources

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