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Quantum groups, skein theories, operadic and diagrammatic algebra, quantum field theory

4 votes
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Identifying the little disk operad with parenthesized braids

It seems to me that the operad morphism from PaB to $\Pi_1(D_2)$ works in positive arity but does not respect composition with the $0$-ary operation on the object level.
Paolo Salvatore's user avatar