2009-03-04 blanchet 2009-03-04 Merge.
2009-03-04 blanchet 2009-03-04 Merge.
2009-02-21 nipkow 2009-02-21 Removed subsumed lemmas
2009-02-20 haftmann 2009-02-20 consider changes variable names in theorem le_imp_power_dvd
2008-08-01 ballarin 2008-08-01 Generalised polynomial lemmas from cring to ring.
2008-07-18 haftmann 2008-07-18 moved op dvd to theory Ring_and_Field; generalized a couple of lemmas
2008-06-10 haftmann 2008-06-10 slightly tuning of some proofs involving case distinction and induction on natural numbers and similar
2007-10-23 nipkow 2007-10-23 went back to >0
2007-10-21 nipkow 2007-10-21 Eliminated most of the neq0_conv occurrences. As a result, many theorems had to be rephrased with ~= 0 instead of > 0.
2007-09-27 paulson 2007-09-27 removal of some "ref"s from res_axioms.ML; a side-effect is that the ordering theorems of Nat.thy are hidden by the Ordering.thy versions
2007-07-24 wenzelm 2007-07-24 fixed proofs involving dvd;
2006-11-08 wenzelm 2006-11-08 moved theories Parity, GCD, Binomial to Library;
2006-08-30 webertj 2006-08-30 lin_arith_prover: splitting reverted because of performance loss
2006-08-03 ballarin 2006-08-03 Restructured algebra library, added ideals and quotient rings.
2006-08-02 webertj 2006-08-02 lin_arith_prover splits certain operators (e.g. min, max, abs)
2005-07-07 nipkow 2005-07-07 linear arithmetic now takes "&" in assumptions apart.
2005-07-01 nipkow 2005-07-01 prime is a predicate now.
2005-06-17 haftmann 2005-06-17 migrated theory headers to new format
2004-06-09 paulson 2004-06-09 moved some cardinality results into main HOL
2004-05-06 wenzelm 2004-05-06 tuned document;
2003-03-18 paulson 2003-03-18 moved Exponent, Coset, Sylow from GroupTheory to Algebra, converting them to the new Group setup. Deleted Ring, Module from GroupTheory Minor UNITY changes