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In several applications, e.g., in control and systems modeling theory, Drazin in- verses and matrix pencil methods for the studyof generalized (descriptor) linear sy stems are used extensively. In this paper, a relation between the Drazin inverse and the Kronecker canonical form of rectangular pencils is derived and fullyinvestigated. Moreover, the relation between the Drazin inverse and the Weierstrass canonical form is revisited byproviding a more algorithmic approach. Finally, the Weierstrass canonical form for a pencil through the core-nilpotent decomposition method is defined.

the electronic journal of linear algebra

The Drazin inverse through the matrix pencil approach and its application to the study of generalized linear systems with rectangular or square coefficient matrices