Mon, 27 Feb 2017 17:17:26 +0000 paulson Some new lemmas thanks to Lukas Bulwahn. Also, NEWS.
Mon, 27 Feb 2017 00:00:28 +0100 wenzelm clarified defaults;
Sun, 26 Feb 2017 23:50:19 +0100 wenzelm tuned whitespace;
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