Displaying similar documents to “Some remarks on the Marcinkiewicz convexity theorem in the upper triangle”

Interpolation of operators when the extreme spaces are L

Jesús Bastero, Francisco Ruiz (1993)

Studia Mathematica

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Under some assumptions on the pair ( A 0 , B 0 ) , we study equivalence between interpolation properties of linear operators and monotonicity conditions for a pair (Y,Z) of rearrangement invariant quasi-Banach spaces when the extreme spaces of the interpolation are L . Weak and restricted weak intermediate spaces fall within our context. Applications to classical Lorentz and Lorentz-Orlicz spaces are given.