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Schur multipliers of the Schatten–von Neumann class $S_p$ for $0<p<1$.

V. V. Peller

St. Petersburg Department of Steklov Mathematical Institute of Russian Academy of Sciences



Abstract: I am going to speak about my joint results with A. B. Aleksandrov. We will discuss various conditions for the membership in the space of Schur multipliers of the Schatten–von Neumann class $S_p$. In particular, we are going to discuss the problem by G. Pisier of whether a Schur multiplier of $S_p$ for $1<p<2$ must be completely bounded. We were able to prove that this is the case for $0<p<1$.


© Steklov Math. Inst. of RAS, 2026