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Apr 30, 2022 at 17:32 history edited The Amplitwist CC BY-SA 4.0
(since this thread is already bumped) changed HTTP to HTTPS, modified URL to point to the first (and only) page of the article instead of to the front page of the journal
Apr 13, 2017 at 12:58 history edited CommunityBot
replaced http://mathoverflow.net/ with https://mathoverflow.net/
Jan 4, 2014 at 11:39 comment added Pete L. Clark @David: It is not completely obvious: the definition of $\operatorname{GL}_n$ expresses it as a Zariski-open subset of affine space, whereas to be affine it needs to be a Zariski-closed subset. The trick in question is to introduce an extra variable...
Jul 8, 2012 at 21:11 comment added David Corwin Sorry, but isn't it obvious that $GL_n$ is an affine algebraic group? Do you mean something different?
Nov 11, 2010 at 17:17 history answered Peter Arndt CC BY-SA 2.5