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Nov 4, 2010 at 23:28 history edited Noah Snyder CC BY-SA 2.5
added 150 characters in body
Nov 4, 2010 at 21:42 comment added Noah Snyder Looks like Tobias is right above.
Oct 7, 2010 at 22:49 comment added Noah Snyder Yes, I think TT>=0, unless I somehow made a mistake. In particular in the Rowell-Strong-Wang paper they're only considering unitary modular tensor categories, and unitary means C.
Oct 7, 2010 at 22:34 comment added pasquale zito With this second -structure, does TT >= 0 hold for any morphism? If not, your counter-example would be ruled out for C*-categories.
Oct 7, 2010 at 22:05 history answered Noah Snyder CC BY-SA 2.5