余集

Traditional form:

餘集

Pinyin (reading):

yújí

Definitions:

• complement of a set S (math.)
• the set of all x not in set S

Characters:

• 余 - surplus, remainder; surname
• 集 - to gather, to collect; set, collection

Traditional characters:

• 餘 - surplus, remainder, excess
• 集 - to gather, to collect; set, collection