As you may know, if a system can be written in the form:
\dot{\mathbf{x}}= -\bigtriangledown V$$\dot{\mathbf{x}}= -\bigtriangledown V$$
for some continuously differentiable, single-valued scalar function V(x)$V(x)$. such a system is called gradient system with potential function V$V$.
The question is that having the gradient system, how can one find its potential function?