2012-01-30 bulwahn 2012-01-30 renaming all lemmas with name rel_pow to relpow
2011-03-30 wenzelm 2011-03-30 modernized specifications;
2010-03-01 haftmann 2010-03-01 replaced a couple of constsdefs by definitions (also some old primrecs by modern ones)
2010-02-11 wenzelm 2010-02-11 modernized translations;
2009-10-17 wenzelm 2009-10-17 eliminated hard tabulators, guessing at each author's individual tab-width; tuned headers;
2009-09-21 haftmann 2009-09-21 theory entry point for session Hoare_Parallel (now also with proper underscore)