From: Ross Street <street@ics.mq.edu.au>
To: categories@mta.ca, jean benabou <jean.benabou@wanadoo.fr>
Subject: Rider to my response to Jean Benabou
Date: Thu, 21 Aug 2003 12:13:27 +1000 [thread overview]
Message-ID: <v04210108bb69d3feb480@[137.111.90.45]> (raw)
Dear Jean
After seeing both Brian and Max in the last two days, I would like to
add two remarks to my last message.
1) Brian pointed out that you did not ask for your base V to be
closed which is assumed in his paper in SLNM137. However, this is
not really a restriction: just embed V in its presheaves with
convolution closed monoidal structure.
2) Max reminded me of his old result (not in the LaJolla Proceedings,
but known soon after) that a monoidal V-category is none other than a
monoidal category W with a "normal" monoidal functor W --> V.
(Normal here means that the unit is preserved.) I think this was
mentioned by Max somewhere in the literature but I cannot remember
where; possibly SLNM420. The good thing about it is that V-categories
enriched in the monoidal V-category W turn out to be mere
W-categories. An example is the monoidal category W = DGAb of chain
complexes of abelian groups; it can be regarded as a monoidal
additive category (that is, enriched in abelian groups V = Ab) or as
a mere monoidal category; categories enriched in the latter are
automatically additive.
Best wishes,
Ross
reply other threads:[~2003-08-21 2:13 UTC|newest]
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