Includes bibliographical references.

Partial differential equations also have principles: Maximum and antimaximum ; On the Fucik spectrum for equations with symmetries ; Variations on the aplacian ; Extremal functions in PoincareSobolev inequalities for functions of bounded variation ; An elementary proof of an inequality of Maz'ya involving ^1 vector fields ; Homoclinic type solutions for a class of differential equations with periodic coefficients ; Quasilinear and singular systems: The cooperative case ; Manifolds of critical points in a quasilinear model for phase transitions ; Weighted asymmetric problems for an indefinite elliptic operator ; Multiple nontrivial solutions of the Dirichlet problem for the prescribed mean curvature equation ; Limits as (x)\to \infty of (x) armonic functions with nonhomogeneous Neumann boundary conditions ; Bifurcation and decay of solutions for a class of elliptic equations on mathbb R^N ; Existence of nodal solutions for some nonlinear elliptic problems ; Admissible urvatures under isometries for the conformal GJMS operators Jean Mawhin ; Bernhard Ruf ; Bernd Kawohl ; Vincent Bouchez and Jean Van Schaftingen ; Pierre Bousquet and Petru Mironescu ; David G Costa and Chengyue Li ; Jacques Giacomoni Jesus Hernandez and Abdelkrim Moussaoui ; Pavel Drabek Raul F Manasevich and Peter Takac ; Liamidi Leadi and Humberto Ramos Quoirin ; Franco Obersnel and Pierpaolo Omari ; Mayte PerezLlanos and Julio D Rossi ; C A Stuart ; Sebastien de Valeriola and Michel Willem ; Frederic Robert