categories - Category Theory list
 help / color / mirror / Atom feed
From: tholen@mathstat.yorku.ca
To: Miles Gould <miles@assyrian.org.uk>, categories@mta.ca
Subject: Re: Fundamental Theorem of Category Theory?
Date: Mon,  8 Jun 2009 07:44:40 -0400	[thread overview]
Message-ID: <E1MDiSE-0000BC-9G@mailserv.mta.ca> (raw)

You could make your choice more comprehensive: Freyd's General and
Special Adjoint Functor Theorems give a more complete picture of the
fundamental relationship between limit preservation and adjointness.

Regards, Walter.

Quoting Miles Gould <miles@assyrian.org.uk>:

> On Fri, Jun 05, 2009 at 04:36:23PM -0400, Ellis D. Cooper wrote:
>> There are Fundamental Theorems of Arithmetic, Algebra, Calculus, and
>> indeed, many more.
>>
>> My question is, What would be candidates for the Fundamental Theorem
>> of Category Theory?
>
> My suggestion would be the theorem that left adjoints preserve colimits,
> and right adjoints preserve limits.
>
...



[For admin and other information see: http://www.mta.ca/~cat-dist/ ]


             reply	other threads:[~2009-06-08 11:44 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-06-08 11:44 tholen [this message]
  -- strict thread matches above, loose matches on Subject: below --
2009-06-22 12:31 claudio pisani
2009-06-19 19:46 Matsuoka Takuo
2009-06-18  8:33 Vaughan Pratt
2009-06-18  0:27 Matsuoka Takuo
2009-06-17 22:45 Steve Lack
2009-06-17 17:04 Fred E.J. Linton
2009-06-17  7:29 Reinhard Boerger
2009-06-17  3:28 Vaughan Pratt
2009-06-16 21:58 Steve Lack
2009-06-16 20:23 Ellis D. Cooper
2009-06-16 19:34 Prof. Peter Johnstone
2009-06-15 22:02 Ellis D. Cooper
2009-06-15 21:58 Vaughan Pratt
2009-06-14 15:08 Makoto Hamana
2009-06-10  2:29 Hasse Riemann
2009-06-08 20:33 Miles Gould
2009-06-07  1:09 Fred E.J. Linton
2009-06-05 20:36 Ellis D. Cooper

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=E1MDiSE-0000BC-9G@mailserv.mta.ca \
    --to=tholen@mathstat.yorku.ca \
    --cc=categories@mta.ca \
    --cc=miles@assyrian.org.uk \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).