8 citations · 10 across the 10 of their papers we have counts for
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math.CO2017
On the maximum of the permanent of (I-A)
Zhi Chen, Lei Cao
Let A be an n by n doubly substochastic matrix and denote σ(A) the sum of all elements of A. In this paper we give the upper bound of the permanent of (I-A) with respect to n and σ…
math.CO2017
Symmetric, Hankel-symmetric, and Centrosymmetric Doubly Stochastic Matrices
Richard R. Brualdi, Lei Cao
We investigate convex polytopes of doubly stochastic matrices having special structures: symmetric, Hankel symmetric, centrosymmetric, and both symmetric and Hankel symmetric. We d…
math.SP2017★ 1 cited
Real Zero Polynomials and A. Horn's Problem
Lei Cao, Hugo J. Woerdeman
A. Horn's problem concerns find two self adjoint matrices A, B, so that A, B, and A+B have prescribed spectrum. In this paper, we show how it connects to an interpolation problem f…