I am studying definiteness of matrices. Like positive, negative and indefinite matrices. I am confused whether this concept of definiteness is only for symmetric matrices or we do it for any matrix ? Further how this idea is related to quadratic form?
2026-05-06 04:16:13.1778040973
Definiteness of matrices
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Most authors restrict the terms "positive definite" etc. to hermitian matrices (symmetric in the real case), but some do not. See e.g. Wikipedia.