Fundamental groups of aspherical manifolds and maps of non-zero degree
Fundamental groups of aspherical manifolds and maps of non-zero degree
We define a new class of irreducible groups, called groups not infinite-index presentable by products or not IIPP. We prove that certain aspherical manifolds with fundamental groups not IIPP do not admit maps of non-zero degree from direct products. This extends previous results of Kotschick and Loeh, providing new classes …