src/HOL/Library/Code_Binary_Nat.thy
Fri, 14 Feb 2014 07:53:46 +0100 blanchet merged 'Option.map' and 'Option.map_option'
Sun, 18 Aug 2013 15:29:50 +0200 haftmann execution of int division by class semiring_numeral_div, replacing pdivmod by divmod_abs
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