# Notation

- Author:
- jgregg

## How to represent the gradient function

So far I have referred to the
In answer to this, you could write . Note that we read this as then .
In this case we would say that the derivative and
or
and

**gradient function**in exercises. There are two representations that you will commonly see for this and in solving problems rather than being asked to find the gradient function you may instead be asked**to find the derivative**

**to differentiate a function**

**the derivative of***y*with respect to*Although we will often use variables***x**.*x*and*y*we can use other variables as well, t is commonly used to represent time and we may say If**of***s***with respect to***t*is 2t. In other cases we use a dash to represent differentiation