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