src/HOL/Library/Nested_Environment.thy
2008-07-07 haftmann 2008-07-07 absolute imports of HOL/*.thy theories
2008-06-26 haftmann 2008-06-26 established Plain theory and image
2008-04-22 haftmann 2008-04-22 constant HOL.eq now qualified
2008-04-02 haftmann 2008-04-02 explicit class "eq" for operational equality
2007-12-10 haftmann 2007-12-10 switched import from Main to List
2007-08-27 haftmann 2007-08-27 added explicit equation for equality of nested environments
2007-06-14 wenzelm 2007-06-14 tuned proofs;
2006-09-11 wenzelm 2006-09-11 induct method: renamed 'fixing' to 'arbitrary';
2006-01-04 nipkow 2006-01-04 Reversed Larry's option/iff change.
2005-12-21 paulson 2005-12-21 removed or modified some instances of [iff]
2005-11-10 wenzelm 2005-11-10 tuned proofs;
2004-08-18 nipkow 2004-08-18 import -> imports
2004-08-16 nipkow 2004-08-16 New theory header syntax.
2004-06-21 kleing 2004-06-21 Merged in license change from Isabelle2004
2004-05-06 wenzelm 2004-05-06 tuned document;
2001-10-16 wenzelm 2001-10-16 tuned induction proofs;
2001-01-20 wenzelm 2001-01-20 tuned;
2001-01-19 wenzelm 2001-01-19 added HOL/Library/Nested_Environment.thy;