Triple bar

≡
Identical to
U+2261 ≡ IDENTICAL TO (≡, ≡)
≢
Not identical to
U+2262 ≢ NOT IDENTICAL TO (≢, ≢)

The triple bar or tribar, ≡, is a symbol with multiple, context-dependent meanings indicating equivalence of two different things. Its main uses are in mathematics and logic. It has the appearance of an equals sign ⟨=⟩ with a third line.

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