Classifying spaces and homotopy sets of axes of pairings

Author:

Ishiguro Kenshi

Abstract

We consider the maps between classifying spaces of the form B K × B L B G BK \times BL \rightarrow BG . The main theorem shows that if the restriction map on B L BL is a weak epimorphism, then the restriction on B K BK should factor through the classifying spaces of the center of the compact Lie group G G . An application implies that B G BG is an H–space (Hopf space) if and only if G G is abelian.

Publisher

American Mathematical Society (AMS)

Subject

Applied Mathematics,General Mathematics

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