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Apr 26, 2012 at 1:38 comment added Allen Knutson Oops, I didn't notice the condition $Y$ affine. I'll think some more.
Apr 24, 2012 at 4:47 comment added Angelo This $Y$ is not affine. In any case you are probably right about the condition.
Apr 24, 2012 at 4:17 history edited Allen Knutson CC BY-SA 3.0
added 22 characters in body
Apr 24, 2012 at 4:01 history answered Allen Knutson CC BY-SA 3.0