학술논문
A note on ultrametric matrices
Document Type
TEXT
Author
Source
Czechoslovak Mathematical Journal | 2004 Volume:54 | Number:4
Subject
Language
English
Abstract
It is proved in this paper that special generalized ultrametric and special $\mathcal U$ matrices are, in a sense, extremal matrices in the boundary of the set of generalized ultrametric and $ \mathcal U$ matrices, respectively. Moreover, we present a new class of inverse $M$-matrices which generalizes the class of $\mathcal U$ matrices.