Using the recently developed theory of Herz-Schur multipliers of a C*-dynamical system, we prove equality of the Haagerup constants for a C*-algebra and its crossed product by an amenable action.
机构:
Univ Tartu, Inst Math & Stat, J Liivi 2, EE-50409 Tartu, Estonia
Estonian Acad Sci, Kohtu 6, EE-10130 Tallinn, EstoniaUniv Tartu, Inst Math & Stat, J Liivi 2, EE-50409 Tartu, Estonia
机构:
Dongguk Univ, Dept Math Educ, Seoul 04620, South KoreaDongguk Univ, Dept Math Educ, Seoul 04620, South Korea
Choi, Geunsu
Jung, Mingu
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机构:
POSTECH, Basic Sci Res Inst, Pohang 790784, South Korea
POSTECH, Dept Math, Pohang 790784, South KoreaDongguk Univ, Dept Math Educ, Seoul 04620, South Korea