Thu, 22 May 1997 15:10:05 +0200 paulson Uses option_case_tac
Thu, 22 May 1997 15:09:37 +0200 paulson Deleted rprod: lex_prod is (usually?) enough
Thu, 22 May 1997 15:09:09 +0200 paulson Deleted obsolete proofs. But option_case_tac will be obsolete too
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