Unicode: Set Theory Symbols ∈ ⊂ ∪ ∩

Common Sets Theory Symbols

ℵ cardinality of infinite sets ℭ continuum

empty set
∅

member
∈ ∉
∋ ∌

subset, superset
⊂ ⊆ ⫅ ⊄ ⊈ ⊊ ⫋
⊃ ⊇ ⫆ ⊅ ⊉ ⊋ ⫌

⥹ ⥻ • ⥺ ⭄

⫇ ⫉
⫈ ⫊

∪ ∩

minus, difference, complement
∖ ∁

Joins
⨝ ⟕ ⟖ ⟗

Misc Set Theory Symbol

⦱ ⦲ ⦳ ⦴ ⦰

⋶ ⋲ ⋳
⋽ ⋺ ⋻

∊ ⋷ ⋴
∍ ⋾ ⋼

⋵ ⋸ ⋹ ⫙ ⟒

⪽ ⪿ ⫁
⪾ ⫀ ⫂

⫃ ⟃ ⫏ ⫑ ⋐ ⟈
⫄ ⟄ ⫐ ⫒ ⋑ ⟉

⫗ ⫘ • ⫓ ⫔ ⫕ ⫖

Union
⩁ ⩂ ⩅ ⩌ ⩏ ⋓ ⩊ ⩐
Intersection
⩀ ⩃ ⩄ ⩍ ⩎ ⋒ ⩋

⩆ ⩈ ⩇ ⩉

N-nary operator
⋂ ⋃ ⨅

coproduct, disjoint union
⨃ ⨄ ⨆

multiset
⊌ ⊍ ⊎