A nonconvex asymptotic quantum Horn body. (English) Zbl 1257.15013
Summary: We prove by a counterexample that asymptotic quantum Horn bodies (cf. [A. Horn, Pac. J. Math. 12, 225–241 (1962; Zbl 0112.01501)]) are not convex in general.
MSC:
15A42 | Inequalities involving eigenvalues and eigenvectors |
46L10 | General theory of von Neumann algebras |