Fri, 20 Jan 2017 17:22:54 +0100 wenzelm tuned;
Fri, 20 Jan 2017 12:44:44 +0100 nipkow added postorder
Fri, 20 Jan 2017 08:49:06 +0100 nipkow tuned
Thu, 19 Jan 2017 17:24:05 +0100 nipkow int version slicker
Thu, 19 Jan 2017 12:39:46 +0100 nipkow tuned
Wed, 18 Jan 2017 21:03:39 +0100 nipkow tuned
Wed, 18 Jan 2017 17:56:52 +0100 wenzelm clarified theory name;
Wed, 18 Jan 2017 15:57:00 +0000 paulson New material from Bertrand's postulate (file Bertrand_Discrete_Sqrt), and tidied an old messy proof
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