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On Nishi's conditions for Ω-property
Publikationstyp
Journal Article
Date Issued
2003
Sprache
English
Author(s)
Institut
TORE-URI
Journal
Volume
E86-A
Issue
9
Start Page
2357
End Page
2359
Citation
IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences 9 (E86-A): 2357-2359 (2003)
Scopus ID
Publisher
IEICE
The concept of an Ω-matrix was introduced by Nishi in order to estimate the number of solutions of a resistive circuit containing active elements. He gave a finite characterization by means of four conditions which are all satisfied if and only if the matrix under investigation is an Ω-matrix. In this note we show that none of the four conditions can be omitted.
Subjects
P-matrix
Resistive circuit
Ω-matrix
DDC Class
004: Informatik
510: Mathematik