This is a preview. Log in through your library . Abstract In this paper we obtain necessary and sufficient conditions for double trigonometric series to belong to generalized Lorentz spaces, not ...
Let A, B, X, and A1,... A2n be bounded linear operators on a complex Hilbert space. It is shown that $\mathrm{w}(\underset{\mathrm{k}=1}{\overset{2\mathrm{n}-1 ...
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