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math.AP2026
A multiplicity theorem for a class of nonlocal elliptic equations involving even nonlinearities
Biagio Ricceri
In this paper, on a bounded domain , we consider a nonlocal problem of the type $$\cases{-Îu=Q(u,λ)f(u) & in $Ω$ \cr & \cr u=0 & on $\partialΩ$\cr}$$ where…
math.AP2025
A note on multiple solutions for Kirchhoff-type equations with a Neumann condition
Biagio Ricceri
Using as a main tool our recent result on the strict minimax inequality proved in [5], in this note we establish a multiplicity theorem for a problem of the type $$\cases{-K\left(\…
math.AP2025
Multiple critical points in closed sets via minimax theorems
Biagio Ricceri
In this paper, we apply our minimax theory ([4], [5], [6]) with the one developed by A. Moameni in [2] to formalize a general scheme giving the multiplicity of critical points. Her…