点集合

點集合

diǎnjíhé

noun

Meanings

1 point set (mathematics)

Characters

to gather; collect

to combine; join

Examples

拓扑学研究的是点集合的性质。

Tuòpū xué yánjiū de shì diǎn jíhé de xìngzhì.

Topology studies the properties of point sets.

这个点集合在平面上是闭合的。

Zhè ge diǎn jíhé zài píngmiàn shàng shì bìhé de.

This point set is closed in the plane.

Tips

usage

Mathematical term; appears in topology and analysis (点集拓扑 = point-set topology). In everyday math, the simpler 集合 ('set') is used; 点集合 specifically emphasizes that the elements are points in some space.

Stroke Order

点 diǎn

集 jí

合 hé