By Claudio Simeone
During this publication, homogeneous cosmological types whose Hamilton-Jacobi equation is separable are deparametrized via turning their motion sensible into that of a normal gauge procedure. Canonical gauges imposed at the gauge method are used to outline an international section time when it comes to the canonical variables of the minisuperspaces. The approach in actual fact exhibits how the geometry of the constraint floor restricts the alternative of time. the results that this has for direction necessary quantization are mentioned, and the transition amplitude is acquired for relativistic isotropic types, relativistic anisotropic types (Kantowski-Sachs and Taub) and isotropic string cosmologies. a whole bankruptcy concerning the program of the deparametrization programme to the standard canonical quantization scheme can be incorporated. This booklet could be of curiosity to graduate scholars and to researchers and teachers in astrophysics and mathematical physics.