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单词 liminf
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liminf

英汉-汉英词典
下极限
词组 | 习惯用语
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  • limn vt. 描写;描绘
  • liming n. 加石灰,撒石灰
  • limiting adj. 限制的;限制性的 v. 限制;限定(limit的现在分词)
  • solemnify vt. 使庄严,使严肃,使隆重,使神圣
中文百科

上极限和下极限 Limit superior and limit inferior

(重定向自Liminf)
上极限和下极限的示意图。串行 xn 绘为蓝色。两个红色曲线逼近 xn 的上极限和下极限,绘为红色虚线。
Limes superior und Limes inferior einer Folge: Die Folge xn wird mit blauen Punkten dargestellt. Die beiden roten Kurven nähern sich dem Limes superior und Limes inferior der Folge an, die als gestrichelte schwarze Linien dargestellt sind.

数学上,串行的上极限下极限可以看为串行的极限上下界。函数的上极限和下极限可以用类似方式考虑。(参见函数的极限)。集合的上极限和下极限分别是这个集合的极限点的上确界和下确界。

英语百科

Limit superior and limit inferior 上极限和下极限

(重定向自Liminf)
An illustration of limit superior and limit inferior. The sequence xn is shown in blue. The two red curves approach the limit superior and limit inferior of xn, shown as dashed black lines. In this case, the sequence accumulates around the two limits. The superior limit is the larger of the two, and the inferior limit is the smaller of the two. The inferior and superior limits agree if and only if the sequence is convergent (i.e., when there is a single limit).
Una ilustración representando el límite superior y el límite inferior en un sistema de coordenadas cartesianas. La sucesión xn está denotada en una línea a puntos azul. Las dos curvas rojas se aproximan al límite superior y límite inferior de xn, cuyo caso se muestran como líneas a trazos rojas, continuas a la derecha.
El límite superior es el más grande de los dos, y el límite inferior el más pequeño de los dos. Los límites superior e inferior sólo coinciden cuando la secuencia es convergente (i.e., cuando el límite es común).

In mathematics, the limit inferior and limit superior of a sequence can be thought of as limiting (i.e., eventual and extreme) bounds on the sequence. They can be thought of in a similar fashion for a function (see limit of a function). For a set, they are the infimum and supremum of the set's limit points, respectively. In general, when there are multiple objects around which a sequence, function, or set accumulates, the inferior and superior limits extract the smallest and largest of them; the type of object and the measure of size is context-dependent, but the notion of extreme limits is invariant. Limit inferior is also called infimum limit, liminf, inferior limit, lower limit, or inner limit; limit superior is also known as supremum limit, limit supremum, limsup, superior limit, upper limit, or outer limit.

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更新时间:2025/6/17 19:59:37