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update in ground_2 and basic_2 (partial commit)
[helm.git] / matita / matita / contribs / lambdadelta / basic_2 / notation / relations / predtysnstar_5.ma
2017-11-14 Ferruccio Guidi- notation change for tdeq and related notions
2017-03-06 Ferruccio Guidi- advances on lfxs for lfpxs