Thu, 22 Oct 2009 13:45:48 +0200 Cezary Kaliszyk The problems with 'abs' term.
Thu, 22 Oct 2009 11:43:12 +0200 Cezary Kaliszyk Simplified the proof with some tactic... Still hangs sometimes.
Thu, 22 Oct 2009 10:45:33 +0200 Cezary Kaliszyk More proof
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