src/HOL/Number_Theory/Residues.thy
2010-04-26 haftmann 2010-04-26 dropped group_simps, ring_simps, field_eq_simps
2010-03-01 haftmann 2010-03-01 replaced a couple of constsdefs by definitions (also some old primrecs by modern ones)
2009-09-01 haftmann 2009-09-01 some reorganization of number theory