Falsely believing that someone is someone else. / (law) A defense in criminal law based on this situation, claiming that any eyewitnesses to a crime incorrectly thought that they saw the defendant.

One's identity on an electronic or digital system such as the Internet.

plural of identity matrix

plural of identity matrix

plural of identity element

(politics) Politics focusing on the self-interest and perspectives of people in various groupings, such as ethnicity, race, religion, gender, and sexual orientation.

(mathematics) A theorem in the elementary theory of numbers: let a and b be integers, not both zero, and let d be their greatest common divisor. Then there exist integers x and y such that ax + by = d.

(genetics) Of corresponding segments of a chromosome in different individuals, identical because they were inherited from a common ancestor without crossover.

(logic) The logical principle that anything equals itself, expressed by the symbolic equation A=A.

(category theory) A unique morphism corresponding to each object of a category, which has its domain equal to its codomain, and which composed with any morphism (with which it is composable) gives that same morphism.