Liftungen von Tripeln
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For triplesS andT in a categoryOl, J. Beck  has shown the equiva-lence of a distributive law 1:TS→ST with a lifting ofT into the category ofS-algebras. Now in this paper it is proved that such a di-⋆ributive law is also equivalent with a lifting of S into the T-Kleisli-category. Distributive laws of mixed type are also considered. Each of the distributive laws GT→TG and TG→GT (with T a triple and G a cotriple inOl) produces a pair of dual liftings.
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