Analysis and topology in nonlinear differential equations : a tribute to Bernhard Ruf on the occasion of his 60th birthday

Preface.- Asymptotic Behavior of Sobolev Trace Embeddings in Expanding Domains.- Multiplicity of Positive Solutions for an Obstacle Problem in R.- Elliptic Problems in Unbounded Cylinders.- Basic Properties of Ultra functions.- Multiple Radial Solutions at Resonance for Neumann Problems Involving the Mean Extrinsic Curvature Operator.- Equivariant Bifurcation in Geometric Variational Problems.- And many more.