Wed, 01 Jun 2016 17:46:12 +0200 wenzelm clarified exception -- actually reject denominator = 0;
Wed, 01 Jun 2016 16:02:02 +0200 wenzelm ML pp for Rat.rat;
Wed, 01 Jun 2016 15:33:45 +0200 wenzelm clarified string_of_rat operations;
Wed, 01 Jun 2016 15:19:44 +0200 wenzelm tuned signature;
Wed, 01 Jun 2016 15:17:29 +0200 wenzelm clarified signature;
Wed, 01 Jun 2016 15:10:27 +0200 wenzelm prefer rat numberals;
Wed, 01 Jun 2016 15:01:43 +0200 wenzelm support rat numerals via special antiquotation syntax;
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