From: "Fred E.J. Linton" <fejlinton@usa.net>
To: <categories@mta.ca>
Subject: Re: pullback ...
Date: Tue, 06 Mar 2007 21:09:33 -0500 [thread overview]
Message-ID: <E1HP0FT-0001IY-6y@mailserv.mta.ca> (raw)
Greetings!
As regards Peter <P.T.Johnstone@dpmms.cam.ac.uk> Johnstone's query,
> ... does anyone out there know who invented the
> terms "pullback" and "pushout"? ...,
while I can't speak directly to the question of who invented those
terms, I do recall that, in the late '50s already, fiber bundles
were being "pulled back" along maps to their base spaces. And I can
still hear the late Serge Lang, bless his soul, intoning "pooll-back"
and "poosh-out" in his characeristic French accent, in Columbia
courses and seminars from the late '50s and early '60s.
So the terms were pretty well established (and pull-back, anyway,
pretty well motivated), at least at Columbia, that early.
Cheers,
-- Fred
next reply other threads:[~2007-03-07 2:09 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-07 2:09 Fred E.J. Linton [this message]
2007-03-07 20:18 pullback Dr. Cyrus F Nourani
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