src/HOL/Data_Structures/Tree23_Set.thy
Sun, 08 Apr 2018 11:05:52 +0200 nipkow more name tuning
Sun, 08 Apr 2018 09:46:33 +0200 nipkow better name; added binary operations
Fri, 23 Mar 2018 11:37:02 +0100 nipkow eliminated "elems"
less more (0) -10 -3 tip