Thu, 10 Jul 2008 13:37:33 +0200 added is_diag;
wenzelm [Thu, 10 Jul 2008 13:37:33 +0200] rev 27520
added is_diag;
Thu, 10 Jul 2008 13:37:31 +0200 slightly improved @{lemma} (both for latex and ML);
wenzelm [Thu, 10 Jul 2008 13:37:31 +0200] rev 27519
slightly improved @{lemma} (both for latex and ML); misc tuning;
Thu, 10 Jul 2008 11:17:16 +0200 misc tuning;
wenzelm [Thu, 10 Jul 2008 11:17:16 +0200] rev 27518
misc tuning; more explicit error messages;
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