Mon, 04 Oct 1999 21:35:26 +0200 wenzelm added mk_conj, mk_disj, mk_imp;
Mon, 04 Oct 1999 21:34:20 +0200 wenzelm added BVC;
Mon, 04 Oct 1999 14:45:35 +0200 wenzelm added mk_conj, mk_disj, mk_imp;
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