闭子集

Traditional form:

閉子集

Pinyin (reading):

bìzǐjí

Definitions:

• closed subset (math.)

Characters:

• 闭 - to shut, to close; to obstruct, to block
• 子 - son, child; seed, egg; fruit; small thing
• 集 - to gather, to collect; set, collection

Traditional characters:

• 閉 - to shut, to close; to obstruct, to block
• 子 - son, child; seed, egg; fruit; small thing
• 集 - to gather, to collect; set, collection