On Tuesday 22 February 2011 3:13:32 PM Vasili I. Galchin wrote:
What is the category that is used to interpret linear logic in a categorical logic sense?
This is rather a guess on my part, but I'd wager that symmetric monoidal closed categories, or something close, would be to linear logic as Cartesian closed categories are to intuitionistic logic. There's a tensor M (x) N, and a unit (up to isomorphism) I of the tensor. And there's an adjunction: M (x) N |- O <=> M |- N -o O suggestively named, hopefully. There's no diagonal A |- A (x) A like there is for products, and I is not terminal, so no A |- I in general. Those two should probably take care of the no-contraction, no-weakening rules. Symmetric monoidal categories mean A (x) B ~= B (x) A, though, so you still get the exchange rule. Obviously a lot of connectives are missing above, but I don't know the categorical analogues off the top of my head. Searching for 'closed monoidal' or 'symmetric monoidal closed' along with linear logic may be fruitful, though. -- Dan