Pavol Quittner Philippe Souplet Blow-up, Global Existence and Steady States Second
Edition Page 1 Birkhäuser Advanced Texts Basler Lehrbücher Pavol Quittner Philippe …

This 2003 book presents min-max methods through a study of the different faces of the
celebrated Mountain Pass Theorem (MPT) of Ambrosetti and Rabinowitz. The reader is led …

In this paper the usual notions of superlinearity and sublinearity for semilinear problems like
_Du ¼ f ðx; uÞ are given a local form and extended to indefinite nonlinearities. Here f ðx; sÞ …

We present several variants of Ljusternik-Schnirelman type theorems in partially ordered
Hilbert spaces, which assert the locations of the critical points constructed by the minimax …

Superlinear Indefinite Elliptic Problems and Pohozaev Type Identities Page 1 journal of
functional analysis 159, 596 628 (1998) Superlinear Indefinite Elliptic Problems and Pohoz$aev …

Existence of positive solutions for a class of indefinite elliptic problems in RN Page 1 Digital
Object Identifier (DOI) 10.1007/s005260000070 Calc. Var. 13, 159–189 (2001) Existence of …

We consider two classes of the second-order Hamiltonian systems with symmetry. If the
systems are asymptotically linear with resonance, we obtain infinitely many small-energy …

In this work, we will study the existence of solutions for a class of problems involving the p-
Laplacian operator with weight and a nonlinearity that changes sign in a domain Ω⊂ RN …

We present some results which show the rich and complicated structure of the solutions of
the second order differential equation ẍ+ w (t) g (x)= 0 when the weight w (t) changes sign …

In this paper, we prove a mountain pass theorem in order intervals in which the position of
the mountain pass point is given precisely in terms of the order structure. By using this result …