Sun, 30 Jul 2006 21:28:50 +0200 wenzelm demod_rule: depend on context, proper Variable.import/export;
Sun, 30 Jul 2006 21:28:48 +0200 wenzelm tuned proofs;
Sun, 30 Jul 2006 05:53:10 +0200 webertj lin_arith_prover splits certain operators (e.g. min, max, abs)
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