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definition of equivalence for local environments,
[helm.git] / matita / matita / contribs / lambdadelta / basic_2 / substitution / fqus_alt.ma
2013-10-25 Ferruccio Guidi- bug fix in the induction for the closure property
2013-10-24 Ferruccio Guidi- "small step" version of "big tree" theorem proved