From: Thomas Streicher <streicher@mathematik.tu-darmstadt.de>
To: Luc Pellissier <luc.pellissier@lipn.univ-paris13.fr>
Cc: categories@mta.ca
Subject: Re: Functors arising from a relational Grothendieck construction
Date: Sat, 17 Jun 2017 11:27:03 +0200 [thread overview]
Message-ID: <E1dMIVp-0006FB-L5@mlist.mta.ca> (raw)
In-Reply-To: <E1dLsdj-0008PH-SL@mlist.mta.ca>
Dear Luc,
I have noticed that, obviously, 2-valued distributors are not closed
under composition in Set-valued distributors. The reason is that in
the latter case the existential quantifier in composition of relations
is understood in a proof relevant way.
So I really don't understand what you mean by Grothendieck
construction applied to a presheaf taking vaues in Rel.
Thomas
[For admin and other information see: http://www.mta.ca/~cat-dist/ ]
next prev parent reply other threads:[~2017-06-17 9:27 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-12 9:37 Luc Pellissier
2017-06-14 1:41 ` David Yetter
2017-06-16 13:16 ` Thomas Streicher
2017-06-17 5:02 ` Ross Street
2017-06-17 9:27 ` Thomas Streicher [this message]
2017-06-23 13:56 ` Luc Pellissier
[not found] ` <5B931A70-3299-433D-89AC-7DFA8627CC2B@lipn.univ-paris13.fr>
2017-06-24 8:37 ` Thomas Streicher
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