Fri, 01 Jul 1994 11:03:42 +0200 clasohm replaced extend_theory by new add_* functions;
Wed, 29 Jun 1994 12:13:03 +0200 clasohm added parentheses made necessary by new constrain precedence
Wed, 29 Jun 1994 12:03:41 +0200 clasohm added parentheses made necessary by change of constrain's precedence
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