Generalized Hilbert series operators

In this note we study the generalized Hilbert series operator $H_μ$, induced by a positive Bore measure $μ$ on $[0, 1)$, between weighted sequence spaces. We characterize the measures $μ$ for which $H_μ$ is bounded between different sequence spaces. Finally, for certain special measures, we obtain the sharp norm estimates of the operators and establish some new generalized Hilbert series inequalities with the best constant factors.

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