Thu, 31 Jan 2019 16:44:04 +0100 wenzelm tuned default layout;
Thu, 31 Jan 2019 16:33:57 +0100 wenzelm clarified default layout: global overview left, local document information right;
Thu, 31 Jan 2019 16:32:41 +0100 wenzelm prefer tail-recursive version (despite 4b99b1214034);
Thu, 31 Jan 2019 13:08:59 +0000 haftmann proper congruence rule for image operator
Thu, 31 Jan 2019 09:30:15 +0100 nipkow less special syntax: make \<Sum> an ordinary function symbol
Wed, 30 Jan 2019 22:46:49 +0100 wenzelm more robust: avoid crash of browser right-click menu;
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