Thu, 23 Nov 2006 18:49:03 +0100 wenzelm ISABELLE_PATH/OUTPUT: append ISABELLE_IDENTIFIER if derived from ISABELLE_HOME_USER;
Thu, 23 Nov 2006 17:52:48 +0100 urbanc fixed some typos
Thu, 23 Nov 2006 14:11:49 +0100 urbanc tuned the proof of the strong induction principle
Thu, 23 Nov 2006 13:32:19 +0100 webertj typo in comment fixed
Thu, 23 Nov 2006 11:39:11 +0100 aspinall Add retractfile to supported pgip commands
Thu, 23 Nov 2006 11:24:33 +0100 aspinall PGIP: add retractfile. Be stricter in file open/close protocol.
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