Singularities of Base Polynomials and Gau-Wu Numbers

Kristin A. Camenga, Louis Deaett, Patrick X. Rault +3

In 2013, Gau and Wu introduced a unitary invariant, denoted by $k(A)$, of an $n\times n$ matrix $A$, which counts the maximal number of orthonormal vectors ${\text{x}}_j$ such that…