Essays on Topology

This book consists of a collection of articles dedicated to Valentin Poénaru, on topology and geometry in a broad sense. Poénaru is one of the leading mathematicians whose work had an essential impact on the development of topology in France over the last forty years of the twentieth century. The special topics addressed in this volume include hyperbolic geometry,  3-manifolds, complex and symplectic geometry, differential topology, combinatorial group theory, piecewise-linear topology, alg