Skip to main content
7 events
when toggle format what by license comment
Feb 13, 2019 at 14:35 history edited Niels CC BY-SA 4.0
added 1 character in body
Jan 20, 2017 at 13:40 history edited Joe Silverman CC BY-SA 3.0
Added reference to Olsson's new book
May 9, 2016 at 5:53 comment added Hoot It's probably worth pointing out that Olsson's book will be out soon.
Dec 31, 2014 at 23:22 comment added Axel Boldt Sorry for the nitpick: a scheme is a covariant functor from commutative rings to sets, not from the opposite category rings^op.
Nov 15, 2009 at 6:41 comment added Harry Gindi Stacks generalize sheaves, fibered categories (equivalently pseudofunctors) generalize presheaves (contravariant functors [into Sets]). The key key idea behind stacks is not only the generalization of functors, but also a generalization of glueing. I disagree with the idea that algebraic spaces should be learned first for the following reason: all of the 2-categorical "stuff" is equivalent to the 1-categorical "stuff" when we restrict ourselves to 1-categories.
Oct 24, 2009 at 1:21 history edited David Zureick-Brown CC BY-SA 2.5
deleted 35 characters in body
Oct 23, 2009 at 18:07 history answered David Zureick-Brown CC BY-SA 2.5