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单词 Convex closure
释义

Convex closure

中文百科

凸包 Convex hull

(重定向自Convex closure)
凸包(Convex hull):弹性绳带的模拟。
Envoltura convexa de un conjunto de 15 puntos en el plano.
The convex hull of the red set is the blue and red convex set.


在一个实数矢量空间V中,对于给定集合X,所有包含X的凸集的交集S被称为X凸包

 S := \bigcap_{X \subseteq K \subseteq V \atop K\ \mathrm{is\ convex}} K.

X的凸包可以用X内所有点(x_1, \ldots, x_n)的线性组合来构造。

 S := \left\{ \left. \, \sum_{j=1}^n t_j x_j\, \right| x_j \in X,\, \sum_{j=1}^n t_j = 1,\, t_j \in \lbrack 0, 1 \rbrack \, \right\}.

在二维欧几里得空间中,凸包可想象为一条刚好包着所有点的橡皮圈。

英语百科

Convex hull 凸包

(重定向自Convex closure)
The convex hull of the red set is the blue and red convex set.
Convex hull of some points in the plane
Convex hull of a finite set: elastic-band analogy
3D convex hull of 120 point cloud

In mathematics, the convex hull or convex envelope of a set X of points in the Euclidean plane or Euclidean space is the smallest convex set that contains X. For instance, when X is a bounded subset of the plane, the convex hull may be visualized as the shape enclosed by a rubber band stretched around X.

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更新时间:2025/6/17 3:47:09