∈
See also: Appendix:Variations of "e"
Translingual
Etymology
From the 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
∈
- (mathematics) Is an element in the set of…
- x ∈ ℕ denotes that x is within the set of natural numbers.