Assertion: identity | /r/HasProperty | equality
Facets:
value: between functions
type: OTHER
value: in mathematics
type: OTHER
Source sentences:
text: In mathematics, an identity is an equality relating one mathematical expression A to another mathematical expression B, such that A and B (which might contain some variables) produce the same value for all values of the variables within a certain range of validity.
text: In other words, A = B is an identity if A and B define the same functions, and an identity is an equality between functions that are differently defined.