Definition:System of Sets

A system of sets is a set whose elements are themselves sets.

Those elements are usually assumed to be subsets of some particular fixed set which is frequently referred to as the universe.

= Semiring of Sets =

= Ring of Sets =

= Algebra of Sets =

= Sigma-Ring =

= Delta-Ring =

= Sigma-Algebra =

= Delta-Algebra =

= Borel Algebra =