20 October 2009
3:00 - 4:30   M Barr
High, wide, and Chu: a new *-autonomous category
ABSTRACT: This is joint work with John Kennison and Bob Raphael

Let R be a commutative ring. We showed in an earlier paper that under the hypothesis that the complete ring of quotients of R was an injective R-module, then there was a full subcategory of the category of topological R-modules that was dual to a full subcategory of discrete R-modules. Here we show that there is even a full subcategory of the category of topological R-modules that is *-autonomous. The crucial tool in this is the the high wide subcategory of the chu category, described in the preceding talk.