### Abstract

We introduce multidimensional Schur multipliers and characterise them, generalising well-known results by Grothendieck and Peller. We define a multidimensional version of the two-dimensional operator multipliers studied recently by Kissin and Shulman. The multidimensional operator multipliers are defined as elements of the minimal tensor product of several C *-algebras satisfying certain boundedness conditions. In the case of commutative C*-algebras, the multidimensional operator multipliersreduce to continuousmul-tidimensional Schur multipliers. We show that the multiplierswith respect to some given representations of the corresponding C*-algebrasdo not change if the representations are replaced by approximately equivalent ones. We establish a non-commutative and multidimensional version of the characterisations by Grothendieck and Peller which shows that universal operator multipliers can be obtained ascertain weak limits of elements of the algebraic tensor product of the corresponding C *-algebras.

Original language | English |
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Pages (from-to) | 4683-4720 |

Number of pages | 38 |

Journal | Transactions of the American Mathematical Society |

Volume | 361 |

Issue number | 9 |

DOIs | |

Publication status | Published - Sep 2009 |

### ASJC Scopus subject areas

- Mathematics(all)
- Applied Mathematics

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## Cite this

Juschenko, K., Todorov, I., & Turowska, L. (2009). Multidimensional operator multipliers.

*Transactions of the American Mathematical Society*,*361*(9), 4683-4720. https://doi.org/10.1090/S0002-9947-09-04771-0