"On Semimonotone Matrices, R -Matrices and Q-Matrices" by Thiruvankatachari Parthasarathy, Gomatam Ravindran et al.
 

On Semimonotone Matrices, R -Matrices and Q-Matrices

Article Type

Research Article

Publication Title

Journal of Optimization Theory and Applications

Abstract

In 1979, Pang proved that within the class of semimonotone matrices, R-matrices are Q-matrices and conjectured that the converse is also true. Jeter and Pye gave a counterexample when n= 5 for the converse; namely, they gave a semimonotone matrix that is in Q but not in R. In this paper, we prove this conjecture for semimonotone matrices of order n≤ 3 and provide a counterexample when n> 3 , showing the sharpness of the result. We also provide an application of this result.

First Page

131

Last Page

147

DOI

10.1007/s10957-022-02066-3

Publication Date

10-1-2022

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