The act or process of equating two or more things, or the state of those things being equal (that is, identical).
An assertion that two expressions are equal, expressed by writing the two expressions separated by an equal sign; from which one is to determine a particular quantity.
A small correction to observed values to remove the effects of systematic errors in an observation.
Sameness, identicalness; the quality or fact of (several specified things) being the same.
An element of an algebraic structure which, when applied to another element under an operation in that structure, yields this second element.
A well-known or famous person.
A name or persona—a mask or appearance one presents to the world—by which one is known.
The difference or character that marks off an individual or collective from the rest of the same kind; selfhood; the sense of who something or someone or oneself is, or the recurring characteristics that enable the recognition of such an individual or group by others or themself.
An equation which always holds true regardless of the choice of input variables.
Any function which maps all elements of its domain to themselves.