title: Extending an almost complete pair of matrices to a complete triple.
abstract: Motivated by the concept of complete pairs, which was introduced by Krein and Langer, we present the concepts of an almost complete pair of matrices and a complete triple of matrices. It is proved that an almost complete pair of matrices can be extended to a complete triple. An application of the result to differential equations is also given.
authors.affiliation: Department of Mathematics, Harbin Institute of Technology, Harbin 150001, China.
authors.forename: Sheng
authors.initials: S
authors.lastname: Chen
authors.affiliation: Department of Mathematics, Harbin Institute of Technology, Harbin 150001, China.
authors.forename: Chao
authors.initials: C
authors.lastname: Xia
mesh_terms: D008962:Models, Theoretical