Partial Derivative
Overview
The partial derivative is the normal derivative of a single variable function applied to the multi-variable function by holding all variables
constant except for the variable for which you are taking the partial derivative. That is, n-variable function is treated as a single variable function
by holding n-1 of the variables constant, and then taking the derivative of the new function by the remaining variable.
{% \frac{\partial{f}}{\partial{x_i}} %}
Definition
