From: Thomas Streicher <streicher@mathematik.tu-darmstadt.de>
To: categories@mta.ca
Subject: question to Colin about uniqueness in his Replacement axiom
Date: Tue, 18 Mar 2008 12:50:50 +0100 (CET) [thread overview]
Message-ID: <E1JbjkP-00079l-1R@mailserv.mta.ca> (raw)
Mike Shulman pointed me out a faulty formulation in my lengthy mail
from last Saturday; I take the opportunity of formulating it correctly:
In your Replacement axiom (p.48 of your "Philosophia" article) you psotulta
the existence of a map f : S -> A such that S_x \cong x^*f for all x : 1->X.
Can you prove that this f is unique up to isomorphism, i.e. that wellpointedness
for maps entails wellpointedness for families?
Thomas
next reply other threads:[~2008-03-18 11:50 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-18 11:50 Thomas Streicher [this message]
2008-03-18 22:28 Colin McLarty
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