(algebra) An element of a structure that produces an identity mapping when applied on the left.

(algebra) An element of an algebraic structure which when applied, in either order, to any other element via a binary operation yields the other element.

(mathematics) A function whose value is always the same as its independent variable, and for which the codomain equals the domain.

(complex analysis) The equation e^(i𝜋)=-1,!, which unifies diverse fields of mathematics.

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

plural of identity matrix

plural of identity element

plural of identity matrix

(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.