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Enriched categories, topoi, abelian categories, monoidal categories, homological algebra.

10 votes

Model Structure/Homotopy Pushouts in topological monoids?

It's easy to describe the group completion of a pushout, up to homotopy. If $Y\leftarrow X \rightarrow Z$ is the diagram of topological monoids, then the group completion of the pushout is equivalent …
John Francis's user avatar