src/HOL/Combinatorics/Perm.thy
Fri, 20 Sep 2024 19:51:08 +0200 wenzelm standardize mixfix annotations via "isabelle update -a -u mixfix_cartouches" --- to simplify systematic editing;
Sun, 09 May 2021 05:48:50 +0000 haftmann more elementary swap
Wed, 05 May 2021 16:09:02 +0000 haftmann tuned theory structure
Wed, 05 May 2021 16:09:02 +0000 haftmann more appropriate location
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