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- nat: some additions, plus_minus_commutative renamed plus_minus_associative
[helm.git] / matita / matita / lib / arithmetics / chebyshev / bertrand.ma
2014-01-26 Ferruccio Guidi- nat: some additions, plus_minus_commutative renamed...
2013-01-03 Andrea AspertiRefactoring
2013-01-03 Andrea AspertiChebishev ported
2012-12-21 Andrea Aspertibertrand OK.
2012-12-19 Andrea Aspertibertrand!