“o a ivanov”

This book introduces readers to both the higher and the more fundamental developments of the basic themes of elementary mathematics. To this end, most chapters begin with a series of elementary problems, behind whose diverting formulation, more advanced mathematical ideas lie hidden. These are then ... More

This book focuses on the classic Steiner Problem and illustrates how results of the problem's development have generated the Theory of Minimal Networks, that is systems of "rubber" branching threads of minimal length. This theory demonstrates a brilliant interconnection among differential and comput... More

The Black Sea ecosystem is a unique marine environment. Its isolation from the ocean and large catchment basin, covering industrial and rural parts of the European and Asian continents, render the Black Sea ecosystem extremely vulnerable to the imposed environmental burdens Complex scientific proble... More

This book deals with the new class of one-dimensional variational problems -- the problems with branching solutions. Instead of extreme curves (mappings of a segment to a manifold) we investigate extreme networks, which are mappings of graphs (one-dimensional cell complexes) to a manifold. Various a... More

Here is the first pedagogical introduction to harmonic superspace in extended supersymmetry by the scientists who developed the method. Inspired by developments in superstring theory, it provides a systematic treatment of the quantum field theories with N=2 and N=3 supersymmetry in Harmonic Superspa... More