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From: Michael Barr <barr@triples.math.mcgill.ca>
Newsgroups: gmane.science.mathematics.categories
Subject: Reference?
Date: Thu, 29 Oct 1998 14:00:03 -0500 (EST)
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Can someone give me a reference for the fact that if the hom functor on a
category factors through commutative monoids then finite products are sums
and vice versa.  Also conversely.

Michael