What is a nonpositive matrix?

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- Sep 6th 2006, 12:13 PMEne Denenonpositive matrix
What is a nonpositive matrix?

- Sep 6th 2006, 12:26 PMThePerfectHackerQuote:

Originally Posted by**Ene Dene**

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Wikipedia: Results, Negative

PlanetMath: Results, Negative

MathWorld: Results, Negative

- Sep 6th 2006, 04:27 PMPlato
I agree with the previous response.

The classical definition of**a matrix being**That is just another way of saying its entries are all non-positive.__negative semidefinite__is that none of its entries are positive. - Sep 6th 2006, 10:07 PMCaptainBlackQuote:

Originally Posted by**Ene Dene**

negative (or one of the equivalent definitions).

A Negative Semi-Definite Matrix - A Hermitian matrix all of whose eigenvalues

are <=0 (or one of the equivalent definitions).

RonL