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math.FA2021
The Gau-Wu Number for and Select Arrowhead Matrices
Kristin A. Camenga, Patrick X. Rault, Ilya M. Spitkovsky +1
The notion of dichotomous matrices is introduced as a natural generalization of essentially Hermitian matrices. A criterion for arrowhead matrices to be dichotomous is established,…
math.FA2019
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 , of an matrix , which counts the maximal number of orthonormal vectors such that…