e/S-ideal

Information
has gloss	eng: In mathematics, particularly measure theory, a σ-ideal of a sigma-algebra (σ, read "sigma," means countable in this context) is a subset with certain desirable closure properties. It is a special type of ideal. Its most frequent application is perhaps in probability theory.
lexicalization	eng: S-ideal
lexicalization	eng: Sigma-ideal
instance of	e/Family of sets