Volume 65, No. 4 (2008)

(Quasi)periodic solutions in (in)finite dimensional Hamiltonian systems with applications to celestial mechanics and wave equation

Quadratic forms for the Liouville equation <var>w_tt</var> + <var>λ</var>²<var>a</var>(<var>t</var>)<var>w</var> = 0 with applications to Kirchhoff equation

On the solution set of some classes of nonconvex nonclosed differential inclusions

A remark on multiple solutions for a nonlinear eigenvalue problem

Uniqueness at infinity in time for the Maxwell–Schrödinger system with arbitrarily large asymptotic data

Study of the maximal throughput of multiclass queueing systems

Editorial Notice on “Decay of solutions of some nonlinear equations” by Mohammed Aassila [Portugaliae Mathematica, Vol. 60, No. 4 (2003), 389–409]