∈

See also: Appendix:Variations of "e"
∈ U+2208, ∈
ELEMENT OF
← ∇
[U+2207] 		Mathematical Operators ∉ →
[U+2209]
∊ U+220A, ∊
SMALL ELEMENT OF
← ∉
[U+2209] 		Mathematical Operators ∋ →
[U+220B]

Translingual

Etymology

From the Ancient Greek letter ϵ (lunate epsilon). The coinage is commonly attributed to Giuseppe Peano, who used the letter epsilon for set membership in his two papers from 1889.[1]

Symbol

∈

  1. (mathematics) Is an element in the set of…
    x ∈ ℕ denotes that x is within the set of natural numbers.

Derived terms
Related terms

References
  1. http://jeff560.tripod.com/set.html
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