Wave Packet Analysis Of Feynman Path Integrals

The purpose of this monograph is to offer an accessible and essentially selfcontained presentation of some mathematical aspects of the Feynman path integral in nonrelativistic quantum mechanics. In spite of the primary role in the advancement of modern theoretical physics and the wide range of applications path integrals are still a source of challenging problem for mathematicians. From this viewpoint path integrals can be roughly described in terms of approximation formulas for an operator us