Symmetry of the spatial numerical ranges of algebra polynomials and of matrix polynomials

Brooks R.M., On locally convex algebras, Pacific J.Math., 23, pp. 5-23, (1967)

Chryssakis Th., Spatial and A-ranges in Topological Algebras, (1980)

Chryssakis Th., φ-Spatial numerical ranges in locally m-convex *-algebras, Math. Jpn., 42, pp. 511-516, (1995)

Fragoulopoulou M., An Introduction to the Representation Theory of Topological *-Algebras, 48, (1988)

Mallios A., Topological Algebras. Selected Topics, (1986)

Maroulas J., Psarrakos P., Geometrical properties of numerical range of matrix polynomials, Math. Appl., 31, pp. 41-47, (1996)

Brooks R.M., On locally convex algebras, Pacific J.Math., 23, pp. 5-23, (1967)

Chryssakis Th., Spatial and A-ranges in Topological Algebras, (1980)

Chryssakis Th., φ-Spatial numerical ranges in locally m-convex *-algebras, Math. Jpn., 42, pp. 511-516, (1995)

Fragoulopoulou M., An Introduction to the Representation Theory of Topological *-Algebras, 48, (1988)

Mallios A., Topological Algebras. Selected Topics, (1986)

Maroulas J., Psarrakos P., Geometrical properties of numerical range of matrix polynomials, Math. Appl., 31, pp. 41-47, (1996)