Monoidal cofibrant resolutions of dg algebras

Details Monoidal cofibrant resolutions of dg algebras Monoidal cofibrant resolutions of dg algebras

2011-12-11

arxiv.org/abs/1112.2360v3

Mathematics

K-Theory and Homology

v3 69 pages (vs v2 39 pages) thoroughly improved and corrected

Scientific paper

Let $k$ be a field of any characteristic. In this paper, we construct a functorial cofibrant resolution $\mathfrak{R}(A)$ for the $\mathbb{Z}_{\le 0}$-graded dg algebras $A$ over $k$, such that the functor $A\rightsquigarrow \mathfrak{R}(A)$ is colax-monoidal with quasi-isomorphisms as the colax maps. More precisely, there are maps of bifunctors $\mathfrak{R}(A\otimes B)\to \mathfrak{R}(A)\otimes \mathfrak{R}(B)$, compatible with the projections to $A\otimes B$, and obeying the colax-monoidal axiom. The main application of such resolutions (which we consider in our next paper) is the existence of a colax-monoidal dg localization of pre-triangulated dg categories, such that the localization is a genuine dg category, whose image in the homotopy category of dg categories is isomorphic to the To\"{e}n's dg localization.

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