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Equivalence of norms on operator space tensor products of -algebras
Authors:Ajay Kumar   Allan M. Sinclair
Affiliation:Department of Mathematics, Rajdhani College (University of Delhi), Raja Garden, New Delhi-110015, India

Allan M. Sinclair ; Department of Mathematics and Statistics, University of Edinburgh, James Clerk Maxwell Building, King's Buildings, Mayfield Road, Edinburgh EH9 3JZ, Scotland

Abstract:The Haagerup norm $Vert cdot Vert _{h}$ on the tensor product $Aotimes B$ of two $C^*$-algebras $A$ and $B$ is shown to be Banach space equivalent to either the Banach space projective norm $Vert cdot Vert _{gamma }$ or the operator space projective norm $Vert cdot Vert _{wedge }$ if and only if either $A$ or $B$ is finite dimensional or $A$ and $B$ are infinite dimensional and subhomogeneous. The Banach space projective norm and the operator space projective norm are equivalent on $Aotimes B$ if and only if $A$ or $B$ is subhomogeneous.

Keywords:Banach space projective norm   operator space projective norm   Haagerup norm   $C^*$-algebras   second dual
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