# Function - Covariant

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### Table of Contents

## 1 - About

A function is covariant when it commutes with the transformation, i.e.:

applying the transformation to the argument of the function has the same effect as applying the transformation to the output of the function.

See also: Function - Invariant

## 2 - Articles Related

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## 3 - Example

The orientation of the major axis of inertia of the surface is covariant under a rotation transformations, since rotating a 2D surface will affect the orientation of its major axis in exactly the same way.