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when toggle format what by license comment
Apr 23, 2012 at 2:53 history edited Steven Landsburg CC BY-SA 3.0
added 20 characters in body
Apr 23, 2012 at 2:52 comment added Steven Landsburg Lee Mosher: I did in fact mean this and dropped a few words along the way. I'm fixing this now; thanks for catching it.
Apr 23, 2012 at 2:22 comment added Lee Mosher $H$ need not be closed under composition. Unless you mean for $H$ to be the group generated by all functions of that form?
Apr 23, 2012 at 1:14 history answered Steven Landsburg CC BY-SA 3.0