From: Thomas Streicher <streicher@mathematik.tu-darmstadt.de>
To: Michael Shulman <shulman@math.uchicago.edu>
Cc: categories@mta.ca
Subject: Re: are fibrations evil?
Date: Sat, 18 Sep 2010 15:48:29 +0200 [thread overview]
Message-ID: <E1OxKn1-0004uw-Nq@mlist.mta.ca> (raw)
In-Reply-To: <E1OwmDF-0000zY-2E@mlist.mta.ca>
We seem to agree that paying attention to the non-kosher concept is at least
very convenient. But what I do not see is a correspondence between kosher and
non-kosher versions. If you start with a collection CC of 1-cells in a 2-cat
like Cat and close it under equivalences thus obtaining CC' I don't see any
way of reconstructing CC from CC' in a canonical way.
Thomas
[For admin and other information see: http://www.mta.ca/~cat-dist/ ]
next prev parent reply other threads:[~2010-09-18 13:48 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-15 11:43 Thomas Streicher
2010-09-16 0:28 ` Michael Shulman
2010-09-16 1:14 ` Peter LeFanu Lumsdaine
2010-09-16 5:14 ` Is equality evil? Vaughan Pratt
2010-09-17 8:28 ` Toby Bartels
2010-09-18 14:11 ` Thomas Streicher
2010-09-19 20:30 ` Erik Palmgren
2010-09-24 12:50 ` Bas Spitters
[not found] ` <20100918141110.GC9467@mathematik.tu-darmstadt.de>
2010-09-22 4:00 ` Toby Bartels
2010-09-25 16:18 ` Michael Shulman
[not found] ` <20100922040041.GB14958@ugcs.caltech.edu>
2010-09-22 10:27 ` Thomas Streicher
2010-09-16 8:50 ` why it matters that fibrations are "evil" Thomas Streicher
[not found] ` <AANLkTinosTZ2NQW9biPxiwpX9zPi5m=kwvA16nHjK=Xu@mail.gmail.com>
2010-09-16 9:47 ` are fibrations evil? Thomas Streicher
2010-09-16 10:00 ` Prof. Peter Johnstone
[not found] ` <alpine.LRH.2.00.1009161023190.12162@siskin.dpmms.cam.ac.uk>
2010-09-16 10:46 ` Thomas Streicher
2010-09-17 7:44 ` Toby Bartels
[not found] ` <20100916094755.GA19976@mathematik.tu-darmstadt.de>
2010-09-17 5:01 ` Michael Shulman
2010-09-18 13:48 ` Thomas Streicher [this message]
[not found] ` <20100918134829.GB9467@mathematik.tu-darmstadt.de>
2010-09-20 16:25 ` Michael Shulman
2010-09-17 2:17 David Roberts
2010-09-17 4:36 John Baez
2010-09-18 13:50 ` Joyal, André
2010-09-19 14:57 ` David Yetter
[not found] ` <F8DA87C6-CBED-44AE-B964-B766A95D8417@math.ksu.edu>
2010-09-19 18:21 ` Joyal, André
2010-09-20 17:04 ` Eduardo J. Dubuc
2010-09-20 16:59 ` Eduardo J. Dubuc
2010-09-22 2:52 ` Toby Bartels
[not found] ` <20100922025245.GA14958@ugcs.caltech.edu>
2010-09-22 18:56 ` Eduardo J. Dubuc
[not found] ` <4C9A5156.3010307@dm.uba.ar>
2010-09-22 21:06 ` Toby Bartels
2010-09-24 23:43 Fred E.J. Linton
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