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positive semidefinite (Definition)

A rational function $ f\in\mathbb{R}(X_1,\ldots,X_n)$ is positive semidefinite if $ f$ is nonnegative whenever it is defined.



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Cross-references: rational function
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This is version 1 of positive semidefinite, born on 2008-01-04.
Object id is 10172, canonical name is PositiveSemidefinite2.
Accessed 336 times total.

Classification:
AMS MSC: 12D15 (Field theory and polynomials :: Real and complex fields :: Fields related with sums of squares )
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