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2012-12-03 | Ferruccio Guidi | - nat.ma: we added a general induction principle | blob | commitdiff | raw |
2012-11-23 | Ferruccio Guidi | additions in lift.ma .... | blob | commitdiff | raw | diff to current |
2012-11-23 | Ferruccio Guidi | the theory of substitution is started ... | blob | commitdiff | raw | diff to current |