Algebraic invariants for homotopy types

Details Algebraic invariants for homotopy types Algebraic invariants for homotopy types

1998-12-07

arxiv.org/abs/math/9812035v1

Mathematics

Algebraic Topology

Scientific paper

10.1017/S030500419900393X

We define inductively a sequence of purely algebraic invariants - namely, classes in the Quillen cohomology of the Pi-algebra \pi_* X - for distinguishing between different homotopy types of spaces. Another sequence of such cohomology classes allows one to decide whether a given abstract Pi-algebra can be realized as the homotopy Pi-algebra of a space in the first place. The paper is written for a relatively general "resolution model category", so it also applies, for example, to rational homotopy types.

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