Tue, 10 Oct 2017 20:33:29 +0200 wenzelm ignore isolated nodes by default;
Tue, 10 Oct 2017 19:51:54 +0200 wenzelm merged
Tue, 10 Oct 2017 19:48:29 +0200 wenzelm cycle check with informative error;
Tue, 10 Oct 2017 19:23:03 +0200 wenzelm tuned: each session has at most one defining entry;
Tue, 10 Oct 2017 13:46:12 +0200 wenzelm more operations;
Tue, 10 Oct 2017 11:24:35 +0200 wenzelm tuned signature;
Tue, 10 Oct 2017 11:20:02 +0200 wenzelm tuned signature;
Tue, 10 Oct 2017 17:15:37 +0100 paulson Divided Topology_Euclidean_Space in two, creating new theory Connected. Also deleted some duplicate / variant theorems
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