Gauge symmetry and Howe duality in 4D conformal field theory models.
Quantum Symmetry of Rational Conformal Models
Arithmetic features of rational conformal field theory
Schur and operator multipliers
The present article is a survey of known results on Schur and operator multipliers. It starts with the classical description of Schur multipliers due to Grothendieck, followed by a discussion of measurable Schur multipliers and a generalisation of Grothendieck's Theorem due to Peller. Thereafter, a non-commutative version of Schur multipliers, called operator multipliers and introduced by Kissin and Schulman, is discussed, and a characterisation extending the description in the commutative case...
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