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Oct 16, 2012 at 10:41 history edited Sasha CC BY-SA 3.0
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Nov 23, 2011 at 18:44 comment added Donu Arapura Take a look at EGA IV, section 16 and in particular 16.8.3. (Trivial aside $D^{\le n}(A)$ isn't a ring, but the union is.)
Nov 23, 2011 at 16:09 answer added Mariano Suárez-Álvarez timeline score: 2
Nov 23, 2011 at 14:00 history asked Sasha CC BY-SA 3.0