Tue, 11 Oct 2005 23:19:50 +0200 huffman cleaned up; renamed less_fun to expand_fun_less
Tue, 11 Oct 2005 17:30:00 +0200 nipkow added hd lemma
Tue, 11 Oct 2005 15:04:11 +0200 paulson simplifying the treatment of clausification
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