Quadratic forms as complete invariants for autonomous braided monoidal groupoids

Ross Street – 24 May 2017

There will be a talk by Dmitri Nikshych at the UNSW on the last Wednesday of this month. His Abstract begins by mentioning ``A classical theorem of Joyal and Street . . . ''. So I thought it might be appropriate to remind you, a week before, of Theorem 3.3 in BTC [44].