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syntactic components detached from basic_2 become static_2
[helm.git] / matita / matita / contribs / lambdadelta / ground_2 / ynat / ynat.ma
2018-07-02 Ferruccio Guidisyntactic components detached from basic_2 become static_2
2015-07-14 Ferruccio Guidi- subtraction (and related notions) removed
2013-11-26 Ferruccio Guidi- natural numbers with infinity for lambdadelta