Cf-perturbations and integration along the fiber (pushout)

Abstract

As we mentioned in the Introduction, we study systems of K-spaces (K-systems) so that the boundary of each of its members is described by a fiber product of other members. We will obtain an algebraic structure on certain cochain complexes which realize the homology groups of certain spaces. They are the spaces over which we take fiber products between members of the system of K-spaces. © Springer Nature Singapore Pte Ltd 2020.