From: Thomas Streicher <streicher@mathematik.tu-darmstadt.de>
To: Michael Shulman <shulman@sandiego.edu>
Cc: "HomotopyTypeTheory@googlegroups.com"
<homotopytypetheory@googlegroups.com>
Subject: Re: [HoTT] "type-theoretic model structures"
Date: Mon, 18 Feb 2019 21:30:24 +0100 [thread overview]
Message-ID: <20190218203024.GB24000@mathematik.tu-darmstadt.de> (raw)
In-Reply-To: <CAOvivQz8y7jGs4oN2byUnN51esEUEKGN5j0MxR3TCN9yMZtJ_w@mail.gmail.com>
Haven't taken pains to examine Andre's treatise at least for the old
display map categories there was no axiom assuring that for every
object X there there is a chain of display maps from X to 1.
So tribes/display map cats are more general model cats, isn't it?
As a model of type theory I don't see any need to have infinitary
axioms as are common in model cats.
Thomas
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next prev parent reply other threads:[~2019-02-18 20:30 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-18 10:25 Thomas Streicher
2019-02-18 14:32 ` Michael Shulman
2019-02-18 20:30 ` Thomas Streicher [this message]
2019-02-18 20:44 ` Michael Shulman
2019-02-18 20:57 ` Thomas Streicher
2019-02-18 21:07 ` Michael Shulman
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