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The Smash Product of Monoidal Theories

The Smash Product of Monoidal Theories

The tensor product of props was defined by Hackney and Robertson as an extension of the Boardmanā€“Vogt product of operads to more general monoidal theories. Theories that factor as tensor products include the theory of commutative monoids and the theory of bialgebras. We give a topological interpretation (and vast generalisation) ā€¦