Wed, 17 Oct 2018 14:19:07 +0100 new theory Abstract_Topology with lots of stuff from HOL Light's metric.sml
paulson <lp15@cam.ac.uk> [Wed, 17 Oct 2018 14:19:07 +0100] rev 69144
new theory Abstract_Topology with lots of stuff from HOL Light's metric.sml
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