Wed, 18 Apr 2012 14:29:19 +0200 hoelzl add lemma to equate floor and div
Wed, 18 Apr 2012 14:29:18 +0200 hoelzl add powr_inj
Wed, 18 Apr 2012 14:29:17 +0200 hoelzl add lemmas to rewrite powr to power
Wed, 18 Apr 2012 14:29:16 +0200 hoelzl add lemmas to compare log with 0 and 1
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