SFB 303 Discussion Paper No. B - 230

Author: Werner, Hans Joachim
Title: Characterizations of Minimal Semipositivity
Abstract: A real m x n Matrix A is said to be semipositive if there is a nonnegative vector x such that Ax exists and is componentwise positive. A is said to be minimally semipositive if it is semipositive and no proper m x n submatrix of A is semipositive. Minimal semipositivity is characterized in this paper and is related to rectangular monotonicity and weak r-monotonicity. P+-matrices and nonnegative matrices will also be considered.
Keywords: Semipositivity, minimal semipositivity, rectangular monotonicity, weak r-monotonicity, nonnegative matrices, P+-matrices
JEL-Classification-Number: 210
Creation-Date: 1992
Unfortunately this paper is not available online. Please contact us to order a hardcopy.

SFB 303 Homepage

09.06.1998, Webmaster