From: Michael Barr <barr@math.mcgill.ca>
To: categories@mta.ca
Subject: Re: Maps of monads - references
Date: Tue, 10 Jul 2007 17:54:35 -0400 (EDT) [thread overview]
Message-ID: <E1I8Oh9-0001QH-Hk@mailserv.mta.ca> (raw)
I think that somewhere Harry Appelgate did something like that, probably
in his Ph.D. thesis. Whether he ever published it, I cannot now say.
Michael
On Tue, 10 Jul 2007, Steven R. Costenoble wrote:
> In Toposes, Triples, and Theories, Barr and Wells define a morphism
> of triples (which, being a student of Peter May, I will call a map of
> monads) in the context of two monads on a given category C. I have a
> situation where I have two categories C and D, a monad S on C, a
> monad T on D, and a functor F: C -> D. There is a fairly obvious
> generalization of the TTT definition, to say that a map from S to T
> is a natural transformation FS -> TF making certain diagrams commute.
> My guess is that someone else noticed this long ago, so I'm looking
> for references to where this has appeared in the literature. I'm
> particularly interested in references that include the fact (at
> least, I'm pretty sure it's a fact) that such maps are in one-to-one
> correspondence with extensions of F to a functor between the
> respective Kleisli categories of S and T.
>
> Thanks in advance.
>
> --Steve Costenoble
>
>
>
next reply other threads:[~2007-07-10 21:54 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-10 21:54 Michael Barr [this message]
-- strict thread matches above, loose matches on Subject: below --
2007-07-22 9:14 Prof. Dr. Pumpluen
2007-07-11 13:04 Steven R. Costenoble
2007-07-11 0:31 Valeria.dePaiva
2007-07-10 19:39 Steve Vickers
2007-07-10 13:25 Steven R. Costenoble
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