The Riemann zeta function is very important in analytic number theory and has applications in physics and the probability theory as well. It computes the p-series for any complex value p:

The definition coded in SciPy allows a more flexible generalization of this function, as follows:

Among others, this function has applications in the field of particle physics and in dynamical systems (http://en.wikipedia.org/wiki/Hurwitz_zeta_function)