The equivalent symbol is used in modular arithmetic to express that two numbers are congruent modulo some number N. Typically, the symbol is used in an expression like this: x ≡ y(mod N) This expression is used to mean three things: x mod N = y mod N N evenly divides x− y x and y differ by a multiple of N

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.

The equals sign (British English) or equal sign (American English), also known as the equality sign, is the mathematical symbol =, which is used to indicate equality in some well-defined sense.