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Feb 16, 2013 at 17:33 history edited Jim Humphreys CC BY-SA 3.0
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Feb 16, 2013 at 17:33 comment added Jim Humphreys @Ben: The direct method you use looks OK, so I'll edit my comments a bit further.
Feb 16, 2013 at 16:28 comment added Ben Webster Jim- Do you think there's something wrong with the direct proof given in my answer? The projective functors used there are translation functors. I also think the OP is just being sloppy about the distinction between translation and projective functors. I think a lot of people say "translation functors" nowadays when they really mean "projective functors."
Feb 16, 2013 at 16:21 history edited Jim Humphreys CC BY-SA 3.0
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Feb 14, 2013 at 16:32 history edited Jim Humphreys CC BY-SA 3.0
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Feb 14, 2013 at 13:54 history answered Jim Humphreys CC BY-SA 3.0