Field of values of perturbed matrices and quantum states
Madjid Khakshour, Gholamreza Aghamollaei, Alemeh Sheikhhosseini · TURKISH JOURNAL OF MATHEMATICS · 2018
In this paper, the notion of the pseudofield of values of matrices is introduced and studied. The relationship between quantum states and the field of values of matrices is mentioned. The notion of the pseudopolynomial numerical hull, as a generalization of the pseudofield of values, of matrices is introduced and some properties of this notion are investigated.