On a linearization trick
Gilles Pisier
Texas A&M University, College Station, USA
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Abstract
In several situations, mainly involving a self-adjoint set of unitary generators of a -algebra, we show that any matrix polynomial in the generators and the unit that is in the open unit ball can be written as a product of matrix polynomials of degree 1 also in the open unit ball.
Cite this article
Gilles Pisier, On a linearization trick. Enseign. Math. 64 (2018), no. 3/4, pp. 315–326
DOI 10.4171/LEM/64-3/4-5