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.

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

plural of identity element

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

plural of identity matrix

plural of identity matrix

(UK, law enforcement) A process by which a witness confirms the identity of a criminal suspect, by viewing the suspect together with other people who were not involved in the crime.

(psychology) A person's internal sense of self as belonging to a particular gender or genders, or to no gender.

(mathematics) Given a binary operation × defined on a set S which also has additive operation + and additive identity 0, the property that a × (b×c) + b × (c×a) + c × (a×b) = 0 for all a, b, c in S.

(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.