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Hausdorff density : ウィキペディア英語版 | Hausdorff density In measure theory, a field of mathematics, the Hausdorff density measures how concentrated a Radon measure is at some point. == Definition ==
Let be a Radon measure and some point in Euclidean space. The ''s''-dimensional upper and lower Hausdorff densities are defined to be, respectively, : is the ball of radius ''r'' > 0 centered at ''a''. Clearly, for all . In the event that the two are equal, we call their common value the s-density of at ''a'' and denote it .
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「Hausdorff density」の詳細全文を読む
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