We prove the existence of a first nontrivial eigenvalue for an asymmetric elliptic problem with
weights involving the laplacian (cf.(1.2) below) or more generally the p-laplacian (cf.(1.3) …

We consider the nonlinear Sturm–Liouville problem [Formula: see text][Formula: see text]
where 1/p, q∈ L 1 (0, 2π), with p> 0 ae on (0, 2π), a, b∈ L 1 (0, 2π), λ is a real parameter …

By using a topological approach and the relation between rotation numbers and weighted
eigenvalues, we give some multiplicity results for the boundary value problem u′′+ f (t …

In this paper, we study the Fučik spectrum of the problem:(*) ẍ+(λ++ q+ (t)) x++ (λ−+ q−(t))
x−= 0 with the 2π-periodic boundary condition, where q±(t) are 2π-periodic. After introducing …

A multiplicity result of periodic solutions for parameter dependent asymmetric non-autonomous
equations Logo del repository 1.Home Esportazione Statistica Opzioni Visualizza tutti i metadati …

The description of this spectrum Σ is classical and explicit when Lu=− u and there is no
weight; ie, m (t)≡ 1 (cf.[6],[9]). The same general picture for Σ remains valid when L is as …

We consider the Sturm–Liouville boundary value problem−(p (x) u′(x))′+ q (x) u (x)= f (x, u
(x))+ h (x), x∈(0, π), c00u (0)+ c01u′(0)= 0, c10u (π)+ c11u′(π)= 0, where p∈ C1 ([0, π]) …

We provide some existence results for Sturm-Liouville boundary value problems associated
with the planar differential system Jz'=g(t,z)+r(t,z) where g is suitably controlled by the …

We investigate the basis properties of sequences of Fučík eigenfunctions of the one-
dimensional Neumann Laplacian. We show that any such sequence is complete in L 2 (0, π) …

On Some Problems with Nonlocal Integral Condition Page 1 Mathematical Modelling and
Analysis ISSN 1392-6292 print Volume 15 Number 1, 2010, pages 113–126 ISSN 1648-3510 …