From: Michael Barr <barr@math.mcgill.ca>
To: Categories list <categories@mta.ca>
Subject: Another question on Grothendieck
Date: Mon, 30 Aug 2010 10:18:30 -0400 (EDT) [thread overview]
Message-ID: <E1Oq7DH-0001gU-Pk@mlist.mta.ca> (raw)
Grothendieck introduces, on the top of p. 209 of the Tohoku paper, the
notation U_{i_0..i_p} without explanation and uses it again over the next
couple pages. Here {U_i} is an open cover of a space X and I have reason
to believe that this stands for the intersection of U_{i_j}. Can anyone
confirm this? Or give an alternate explanation?
The context is that of a claim that (when A is a sheaf) and "every
U_{i_0..i_p} is A-acyclic, then"... and that awfully like the definition
of a simple cover.
Michael
[For admin and other information see: http://www.mta.ca/~cat-dist/ ]
next reply other threads:[~2010-08-30 14:18 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-30 14:18 Michael Barr [this message]
2010-08-30 18:04 ` Andrew Stacey
[not found] ` <E1Or9Si-00031p-Iw@mlist.mta.ca>
2010-09-03 6:46 ` Vaughan Pratt
[not found] ` <4C819AD7.8090403@dm.uba.ar>
2010-09-04 7:04 ` Vaughan Pratt
[not found] ` <4C82A02D.7090703@dm.uba.ar>
2010-09-05 23:23 ` Vaughan Pratt
[not found] ` <E1Ort7T-00087z-SA@mlist.mta.ca>
2010-09-05 19:51 ` Steven Vickers
2010-09-06 17:53 ` Eduardo J. Dubuc
2010-08-31 5:50 ` John Baez
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