Showing math.COShow all
2 papers · 1 filter
math.CO2026
A strong nullity parameter for rooted graphs
Aida Abiad, Mary Flagg, H. Tracy Hall +2
The inverse eigenvalue problem of a graph studies the possible spectra of matrices associated with , including as an important subproblem the possible nullities of such a ma…
math.CO2025
Patterns that require distinct singular values
Caleb Cheung, Bryan Shader
Patterns of m by n matrices of term-rank m for which every real matrix with the pattern has no multiple singular value are characterized. This generalizes Fiedler's characterizatio…