Floris van Doorn e8b076e460 feat(hott/types/sigma): port large part of the sigma library from the hott library ... most importantly, prove the characterization of paths in sigma types		2014-11-22 17:44:12 -08:00
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sigma.lean	feat(hott/types/sigma): port large part of the sigma library from the hott library	2014-11-22 17:44:12 -08:00