Title |
Matrices totally positive relative to a tree, II |
Authors |
COSTAS SANTOS, ROBERTO SANTIAGO, Johnson, C. R. |
External publication |
Si |
Means |
LINEAR ALGEBRA AND ITS APPLICATIONS |
Scope |
Article |
Nature |
Científica |
JCR Quartile |
1 |
SJR Quartile |
1 |
JCR Impact |
0.973 |
SJR Impact |
1.07 |
Web |
https://www.scopus.com/inward/record.uri?eid=2-s2.0-84964474465&doi=10.1016%2fj.laa.2016.04.021&partnerID=40&md5=34d6e31c84c9edbc1cc1278e9c89a4d2 |
Publication date |
15/09/2016 |
ISI |
000378464500001 |
Scopus Id |
2-s2.0-84964474465 |
DOI |
10.1016/j.laa.2016.04.021 |
Abstract |
If T is a labelled tree, a matrix A is totally positive relative to T, principal submatrices of A associated with deletion of pendent vertices of T are P-matrices, and A has positive determinant, then the smallest absolute eigenvalue of A is positive with multiplicity 1 and its eigenvector is signed according to T. This conclusion has been incorrectly conjectured under weaker hypotheses. (C) 2016 Elsevier Inc. All rights reserved. |
Keywords |
Graph; Neumaier conclusion; Spectral theory; Sylvester's identity; Totally positive matrix; Totally positive relative to a tree |
Universidad Loyola members |
|