2011-03-30 wenzelm 2011-03-30 modernized specifications;
2011-02-25 nipkow 2011-02-25 added simp lemma nth_Cons_pos to List
2010-03-01 haftmann 2010-03-01 replaced a couple of constsdefs by definitions (also some old primrecs by modern ones)
2009-09-21 haftmann 2009-09-21 tuned proofs; be more cautios wrt. default simp rules
2009-09-21 haftmann 2009-09-21 theory entry point for session Hoare_Parallel (now also with proper underscore)