Sat, 02 Nov 2019 21:42:45 +0000 paulson moved line segments to Convex_Euclidean_Space
Sat, 02 Nov 2019 23:43:08 +0100 wenzelm proper theory for export_proofs;
Sat, 02 Nov 2019 23:13:15 +0100 wenzelm tuned signature;
Sat, 02 Nov 2019 20:52:24 +0000 paulson merged
Sat, 02 Nov 2019 20:51:54 +0000 paulson just tidied one proof
Sat, 02 Nov 2019 20:56:22 +0100 wenzelm proper graph traversal -- avoid exponential blowup (amending 71d1971d67ad);
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