Mon, 11 Oct 1999 10:52:51 +0200 paulson replaced {x. True} by UNIV to work with the new simprule, Collect_const
Mon, 11 Oct 1999 10:51:24 +0200 paulson new default simprule Collect_const and new them Diff_insert_absorb
Mon, 11 Oct 1999 10:50:41 +0200 paulson new thm vimage_INT; deleted redundant UN_vimage
Mon, 11 Oct 1999 10:49:18 +0200 paulson new thm Domain_mono
Mon, 11 Oct 1999 10:48:44 +0200 paulson new thm card_Diff_singleton; tidied
Sat, 09 Oct 1999 23:20:49 +0200 wenzelm more explanations;
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