Function - Invariant
Table of Contents
1 - About
A function (or property) is invariant under a certain family of transformations if its value does not change when a transformation from this family is applied to its argument.
See also: Function - Covariant
2 - Articles Related
3 - Example
The area of a 2D surface is invariant under 2D rotations, since rotating a 2D surface does not make it any smaller or bigger.