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Positive-definite function : ウィキペディア英語版 | Positive-definite function In mathematics, the term positive-definite function may refer to a couple of different concepts. ==In dynamical systems==
A real-valued, continuously differentiable function ''f'' is positive definite on a neighborhood of the origin, ''D'', if and for every non-zero . A function is negative definite if the inequality is reversed. A function is semidefinite if the strong inequality is replaced with a weak ( or ) one.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Positive-definite function」の詳細全文を読む
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