src/HOL/Data_Structures/Tree23_Set.thy
2015-11-15 nipkow 2015-11-15 tuned white space
2015-11-11 nipkow 2015-11-11 no CRLF
2015-11-05 nipkow 2015-11-05 tuned
2015-11-05 nipkow 2015-11-05 Convertd to 3-way comparisons
2015-11-02 nipkow 2015-11-02 tuned names and optimized comparison order
2015-10-25 nipkow 2015-10-25 tuned
2015-10-18 nipkow 2015-10-18 added 2-3 trees (simpler and more complete than the version in ex/Tree23)