2 papers
math.SP2019
Inertias of Laplacian matrices of weighted signed graphs
Keivan Hassani Monfared, Gary MacGillivray, Dale D. Olesky +1
We study the sets of inertias achieved by Laplacian matrices of weighted signed graphs. First we characterize signed graphs with a unique Laplacian inertia. Then we show that there…
math.CO2018
The sepr-sets of sign patterns
Leslie Hogben, Jephian C. -H. Lin, D. D. Olesky +1
Given a real symmetric matrix, the sepr-sequence records information about the existence of principal minors of each order that are positive, negative,…