Classroom note: An extension of Lagrange's identity to matrices
In this note the well-known Lagrange identity is extended to matrices. The resulting generalized Lagrange identity is used to give characterizations of symmetry, commutativity of projectors and normality.
Document Type: Research Article
Affiliations: Department of Statistics University of Dortmund D-44221 Dortmund Germany, Email: [email protected]
Publication date: 01 March 2004
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