From Wiktionary, the free dictionary
(Redirected from )
Jump to navigation Jump to search

U+2208, ∈
ELEMENT OF

[U+2207]
Mathematical Operators
[U+2209]
U+220A, ∊
SMALL ELEMENT OF

[U+2209]
Mathematical Operators
[U+220B]

Translingual

[edit]

Etymology

[edit]

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

[edit]

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

Derived terms

[edit]

References

[edit]