src/HOL/Data_Structures/RBT_Set.thy
2017-01-27 nipkow 2017-01-27 removed contribution by Daniel Stuewe, too detailed.
2017-01-26 nipkow 2017-01-26 added concise log height bound lemma
2017-01-25 nipkow 2017-01-25 tuned
2016-10-16 haftmann 2016-10-16 more standardized theorem names for facts involving the div and mod identity
2016-07-07 nipkow 2016-07-07 got rid of class cmp; added height-size proofs by Daniel Stuewe
2016-03-06 nipkow 2016-03-06 tuned
2015-11-29 nipkow 2015-11-29 RBT invariants for insert
2015-11-27 nipkow 2015-11-27 paint root black after insert and delete
2015-11-15 nipkow 2015-11-15 tuned white space
2015-11-05 nipkow 2015-11-05 tuned
2015-11-05 nipkow 2015-11-05 Convertd to 3-way comparisons
2015-10-13 nipkow 2015-10-13 added invar empty
2015-09-23 nipkow 2015-09-23 tuned
2015-09-22 nipkow 2015-09-22 added red black trees