In this paper we examine the symmetry of numerical ranges in a unital locally -convex - algebra of a given element and its adjoint, with respect to a rotated real-axis, where the rotation angle depends on the value of the positive linear forms of the algebra (states) at the unit clement of the algebra.
Cite this article
Th. Chryssakis, Geometry of Numerical Ranges in Locally -Convex *-Algebras. Z. Anal. Anwend. 19 (2000), no. 1, pp. 3–12DOI 10.4171/ZAA/934