零れい集しゅう合ごう

れ

い

しゅ

う

ご

う

Meanings

1

noun

null set; set of measure zero

mathematics

Technical term in measure theory; a set with Lebesgue measure zero. Not a general term for an empty set.

zero, spill, overflow

集gather, meet, congregate

合fit, suit, join

空くう集しゅう合ごう
空集合 is the empty set (no elements), while 零集合 is a set of measure zero (may contain elements).

Compound of 零 (zero) and 集合 (set), a direct translation of the mathematical term 'null set'.