src/HOL/Algebra/Congruence.thy
2010-03-21 wenzelm 2010-03-21 eliminated old constdefs;
2010-02-24 wenzelm 2010-02-24 modernized syntax declarations, and make them actually work with authentic syntax;
2008-12-16 ballarin 2008-12-16 More porting to new locales.
2008-08-01 ballarin 2008-08-01 Generalised polynomial lemmas from cring to ring.
2008-07-29 ballarin 2008-07-29 New theory on divisibility.