Identity (mathematics)
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This disambiguation page lists articles associated with the same or a similar title.
In mathematics, identity may refer to:
- Identity element, or neutral element, with respect to a binary operation, an element which leaves the other operand unchanged.
- The identity matrix, the neutral element for matrix multiplication.
- Identity function on a set to itself which maps each element to itself.
- The identity relation (mathematics) is the relation expressing equality.
- Any equality between variables which is universally true, as opposed to an equation to be solved.