From: Wilkins E B <elwood@essex.ac.uk>
To: Category mailing list <categories@mta.ca>
Subject: Osius' set theory
Date: Mon, 17 Apr 2000 14:12:50 +0100 [thread overview]
Message-ID: <38FB0DD2.DD7B2B@essex.ac.uk> (raw)
Hello,
In his 1974 paper Osius showed that there are enough transitive objects
in the initial topos to define a naive set theory. He then goes on the
assume his topoi are well-pointedness and produces a characterisation of
the category of sets in terms familiar to set theorists. I'm wondering
whether anyone has produced an axiomatic set theory from Osius' naive
set theory which characterises the initial topos.
--
Dr Elwood Wilkins e-mail: elwood@essex.ac.uk
Senior Research Officer tel: (+44) (0)1206 872336
Department of Computer Science fax: (+44) (0)1206 872788
University of Essex, Colchester, Essex, UK
next reply other threads:[~2000-04-17 13:12 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-04-17 13:12 Wilkins E B [this message]
2000-04-17 15:57 Paul Taylor
2000-04-19 15:52 Wilkins E B
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