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- advances on hereditarily free variables: now "frees" is primitive
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2014-04-25 Ferruccio Guidi- advances in the theory of cofrees
2014-03-30 Ferruccio Guidiupdate of the partial commit:
2014-03-11 Ferruccio Guidireaxiomatized lleq fixes a bug in it and allows to...
2014-01-17 Ferruccio Guidi- commit of the "substitution" component
2014-01-09 Ferruccio Guidi- ynat: some additions
2014-01-06 Ferruccio Guidi- lleq now uses ynat
2014-01-05 Ferruccio Guidi- new definition of lazy equivalence for local environm...