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letins are no more unfolded, we do that by hand
[helm.git] / helm / software / matita / dama_didactic /
2008-01-14 Enrico Tassifixed uris
2007-11-26 Claudio Sacerdoti... Axiom moved from ex_deriv to deriv where it belongs to.
2007-11-26 Claudio Sacerdoti... Notation improved.
2007-11-21 Claudio Sacerdoti... Very incomplete example of simple calculus exercises...