Difference between revisions of "Union"
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Revision as of 15:44, 20 December 2015
Definition
Given a collection of sets {Sα}α∈A their union is:
- ⋃α∈ASα with the characteristic property that:
- x∈⋃α∈ASα⟺∃β∈A[x∈Sβ]
Immediate results
References
TODO: Flesh this out
