Stephan Weis

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20102026

most citedClassification of joint numerical ranges of three hermitian matrices of size three

40 citations · 250 across the 28 of their papers we have counts for

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math.MG2016

Operator systems and convex sets with many normal cones

Stephan Weis

The state space of an operator system of $n$ -by- $n$ matrices has, in a sense, many normal cones. Merely this convex geometrical property implies smoothness qualities and a clusteri…

math.FA2016★ 40 cited

Classification of joint numerical ranges of three hermitian matrices of size three

Konrad Szymański, Stephan Weis, Karol Życzkowski

The joint numerical range $W (F)$ of three hermitian $3$ -by- $3$ matrices $F = (F_{1}, F_{2}, F_{3})$ is a convex and compact subset in $R^{3}$ . Generically we find that $W (F)$ is a thr…