3 citations · 5 across the 5 of their papers we have counts for
5 papers
Local minimizers for a class of functionals over the Nehari set
Humberto Ramos Quoirin, Kaye Silva
We analyze the topological structure of the Nehari set for a class of functionals depending on a real parameter , and having two degrees of homogeneity. A special attention is p…
Loop type subcontinua of positive solutions for indefinite concave-convex problems
Uriel Kaufmann, Humberto Ramos Quoirin, Kenichiro Umezu
We establish the existence of loop type subcontinua of nonnegative solutions for a class of concave-convex type elliptic equations with indefinite weights, under Dirichlet and Neum…
A curve of positive solutions for an indefinite sublinear Dirichlet problem
Uriel Kaufmann, Humberto Ramos Quoirin, Kenichiro Umezu
We investigate the existence of a curve , with , of positive solutions for the problem : in , on , where $…
Elliptic equations involving the -Laplacian and a gradient term having natural growth
Djairo G. de Figueiredo, Jean-Pierre Gossez, Humberto Ramos Quoirin +1
We investigate the problem $$ \left\{ \begin{array}{ll} -Δ_p u = g(u)|\nabla u|^p + f(x,u) \ & \mbox{in} \ \ Ω, \ \ \\ u>0 \ &\mbox{in} \ \ Ω, \ \ u = 0 \ &\mbox{on} \ \ \partialΩ,…
Positive steady states of an indefinite equation with a nonlinear boundary condition: existence, multiplicity, stability and asymptotic profiles
Humberto Ramos Quoirin, Kenichiro Umezu
We investigate positive steady states of an indefinite superlinear reaction-diffusion equation arising from population dynamics, coupled with a nonlinear boundary condition. Both t…