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created traced monoidal category with a bare minimum
I would have sworn that we already had an entry on that, but it seems we didn’t. If I somehow missed it , let me know and we need to fix things then.
added a brief paragraph on the relation to compact closed categories:
Given a traced monoidal category , there is a free construction completion of it to a compact closed category (Joyal-Street-Verity 96):
the objects of are pairs of objects of , a morphism in is given by a morphism of the form in , and composition of two such morphisms and is given by tracing out and in the evident way.
Copied the same paragraph over to compact closed category.
I added a reference to the characterization of traces in cartesian monoidal categories (by Hasegawa and Hyland), and then because this page was still missing a definition I pulled in the definition (for symmetric monoidal categories) from Hasegawa.
Thanks!
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