Wed, 23 Jul 2014 15:00:46 +0200 clarified display;
wenzelm [Wed, 23 Jul 2014 15:00:46 +0200] rev 57617
clarified display;
Wed, 23 Jul 2014 14:50:20 +0200 avoid redundant data structure;
wenzelm [Wed, 23 Jul 2014 14:50:20 +0200] rev 57616
avoid redundant data structure;
Wed, 23 Jul 2014 13:01:30 +0200 more explicit discrimination of empty nodes -- suppress from Theories panel;
wenzelm [Wed, 23 Jul 2014 13:01:30 +0200] rev 57615
more explicit discrimination of empty nodes -- suppress from Theories panel;
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