Sun, 05 Apr 2020 21:05:08 +0200 wenzelm clarified signature;
Mon, 06 Apr 2020 19:46:38 +0100 paulson a few more applys
Mon, 06 Apr 2020 11:56:04 +0100 paulson fixed a broken frac_le proof
Sun, 05 Apr 2020 22:04:19 +0100 paulson fixed more nasty proofs
Sun, 05 Apr 2020 17:12:37 +0100 paulson merged
Sun, 05 Apr 2020 17:12:26 +0100 paulson Tidied up more ancient, horrible proofs. Liberalised frac_le
Sun, 05 Apr 2020 13:24:12 +0200 wenzelm clarified signature: more uniform ML vs. Scala;
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