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From: Michael Barr <barr@math.mcgill.ca>
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Subject: Help!
Date: Fri, 5 Oct 2007 08:52:29 -0400 (EDT)
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What would you say to an undergraduate math club about categories?  I have
been thinking about it, but I am not sure what to say.  Talk about
cohomology, which is what motivated E-M?  I don't think so.  Talk about
dual spaces of finite-dimensional vector spaces?  Maybe, but then what?

Michael