CIRJE-F-476 "On some definitions in matrix algebra"
Author Name Magnus, Jan R. and Karim M. Abadir
Date February 2007
Full Paper PDF file
Remarks Revised as Magnus, J.R., "Derivatives and derisatives in matrix calculus".@

Many definitions in matrix algebra are not standardized. This notediscusses some of thepitfalls associated with undesirable orwrong definitions, anddealswith central conceptslikesymmetry, orthogonality, square root, Hermitian and quadratic forms, and matrix derivatives.