Behavior of Quillen (co)homology with respect to adjunctions

Details Behavior of Quillen (co)homology with respect to adjunctions Behavior of Quillen (co)homology with respect to adjunctions

2010-09-27

arxiv.org/abs/1009.5156v2

Mathematics

Algebraic Topology

Version 2 (November 23, 2010): Fixed a mistake in Proposition 3.12 (4) and 3.13 (2). Minor cosmetic changes

Scientific paper

This paper aims to answer the following question: Given an adjunction between two categories, how is Quillen (co)homology in one category related to that in the other? We identify the induced comparison diagram, giving necessary and sufficient conditions for it to arise, and describe the various comparison maps. Examples are given. Along the way, we clarify some categorical assumptions underlying Quillen (co)homology: cocomplete categories with a set of small projective generators provide a convenient setup.

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