Gaussian elimination for flexible systems of linear inclusions
Nam Van Tran
Ho Chi Minh City University of Technology and Education, Ho Chi Minh City, VietnamImme van den Berg
University of Évora, Évora, Portugal
![Gaussian elimination for flexible systems of linear inclusions cover](/_next/image?url=https%3A%2F%2Fcontent.ems.press%2Fassets%2Fpublic%2Fimages%2Fserial-issues%2Fcover-pm-volume-81-issue-3.png&w=3840&q=90)
Abstract
Flexible systems are linear systems of inclusions in which the elements of the coefficient matrix are external numbers in the sense of nonstandard analysis. External numbers represent real numbers with small, individual error terms. Using Gaussian elimination, a flexible system can be put into a row-echelon form with increasing error terms on the right-hand side. Then parameters are assigned to the error terms and the resulting system is solved by common methods of linear algebra. The solution set may have indeterminacy not only in terms of linear spaces, but also of modules. We determine maximal robustness for flexible systems.
Cite this article
Nam Van Tran, Imme van den Berg, Gaussian elimination for flexible systems of linear inclusions. Port. Math. 81 (2024), no. 3/4, pp. 265–305
DOI 10.4171/PM/2123