≡
Mathematics
The symbol ≡ is used in mathematics with several different meanings:
- Identity (mathematics), identity of two mathematical expressions
- Logical biconditional, in logic (if and only if)
- Congruence relation, in algebra
Science
It is also used in science to show a triple bond between two atoms.
See also
- ☰, Qián, the trigram of the I Ching that consists of three unbroken lines
- Ξ, capital letter Xi of the Greek alphabet
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