# ≡

See also: Ξ [U+039E GREEK CAPITAL LETTER XI], [U+2630 TRIGRAM FOR HEAVEN], and [U+4E09 CJK UNIFIED IDEOGRAPH-4E09]
Character ≡ IDENTICAL TO U+2261 Mathematical Operators \equiv

## Translingual

### Symbol

1. (mathematics) "is equivalent to"
2. (mathematics) "is identically equal to". "is defined as" or "is set to".
The functions f and g satisfy f≡g if and only if their respective domain of definition coincide, and if f(x)=g(x) for all x in this domain.
3. (number theory) "is congruent to"; used in calculations of modulo.
15≡3 mod 4, since both 15 and 3 gives a remainder of 3 when divided by 4.
4. (chemistry) A triple bond.
5. (logic, dated) if and only if
6. (logic) elementary equivalence
7. (meteorology) fog