Set operators

• ∪ (union)

• ∩ (intersection)

• ∆ (SymmetricDifference)

• ∖ (SetDifference)

• ∁ (complement)

• ∈ (ElementOf)

• ∉ (NotElementOf)

• ∋ (ContainsAsElement)

• ∌ (NotContainsAsElement)

• ⊂, ⊆ (subset)

• ⊊ (ProperSubset)

• ⊃, ⊇ (superset)

• ⊋ (ProperSuperset)