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Stream: theory: algebraic topology

Topic: Simplicial join monoid

Alonso Perez-Lona (Oct 02 2025 at 13:32):

One of the motivations, it seems, for introducing _augmented_ simplicial sets is that this provides a monoidal unit for the join operation of simplicial sets. But then, what does one do with this? More to the point, are there known examples of monoid objects under the join operation of augmented simplicial sets?