English

Matrices Totally Positive Relative to a Tree, II

Combinatorics 2015-02-19 v2

Abstract

In this paper we prove that for a general tree TT, if AA is T-TP, all the submatrices of AA associated with the deletion of pendant vertices are PP-matrices, and detA>0\det A>0, then the smallest eigenvalue has an eigenvector signed according to TT.

Cite

@article{arxiv.1003.5160,
  title  = {Matrices Totally Positive Relative to a Tree, II},
  author = {R. S. Costas-Santos and C. R. Johnson},
  journal= {arXiv preprint arXiv:1003.5160},
  year   = {2015}
}

Comments

11 pages, 2 figures, submitted to LAA

R2 v1 2026-06-21T15:03:06.855Z