Positively regular vague matrices Original Research Article

Positive regularity is a common attribute of inaccurate square matrices which can be used in linear equation systems that provide only nonnegative solutions. It is studied within the framework of vague matrices which can be considered as a generalization of interval matrices. Criteria of positive regularity are derived and a method of verifying them is outlined. The exposition concludes with a characterization of the radius of positive regularity.