# Discretizing the Currents

Discretizing the object or solution space is commonly referred to as meshing. It is a necessary step to solve the integral equations.

The equation for the discretized currents can then be substituted into the EFIE (Equation 1) to yield:

In Equation 2, the current coefficients represented by ${a}_{n}$ are the only unknown quantity.

Before proceeding to the next step, it is necessary to take a closer look at basis functions.