Definite quadratic form

In mathematics, a definite quadratic form is a quadratic form over some real vector space $V$ that has the same sign (always positive or always negative) for every nonzero vector of $V$ . According to that sign, the quadratic form is called positive definite or negative definite.

单词	Indefinite form
释义	Indefinite form 英语百科 Definite quadratic form In mathematics, a definite quadratic form is a quadratic form over some real vector space $V$ that has the same sign (always positive or always negative) for every nonzero vector of $V$ . According to that sign, the quadratic form is called positive definite or negative definite.
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Indefinite form

Definite quadratic form