From: Thomas Streicher <streicher@mathematik.tu-darmstadt.de>
To: Peter Johnstone <ptj@dpmms.cam.ac.uk>
Cc: categories@mta.ca
Subject: Re: when is Fam (E) a topos?
Date: Sun, 23 Apr 2017 10:52:07 +0200 [thread overview]
Message-ID: <20170423085207.GA15112@mathematik.tu-darmstadt.de> (raw)
In-Reply-To: <alpine.DEB.2.10.1704221719340.10704@siskin.dpmms.cam.ac.uk>
Peter's argument also shows that a topos E has copowers of 1 already if
Fam(E) is cartesian closed. Thus, we have also examples of fibrations
of ccc's over a topos whose total category is not even cc.
Thomas
[For admin and other information see: http://www.mta.ca/~cat-dist/ ]
next prev parent reply other threads:[~2017-04-23 8:52 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-19 9:23 Thomas Streicher
2017-04-21 9:01 ` Thomas Streicher
2017-04-22 16:35 ` Peter Johnstone
[not found] ` <alpine.DEB.2.10.1704221719340.10704@siskin.dpmms.cam.ac.uk>
2017-04-23 8:52 ` Thomas Streicher [this message]
2017-04-24 9:57 When is Fam(E) " Peter Johnstone
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