Editing Radius of convergence (section)

==Abscissa of convergence of a Dirichlet series==

An analogous concept is the [[abscissa of convergence|abscissa of convergence of a Dirichlet series]]

:<math>\sum_{n=1}^\infty \frac{a_n}{n^s}.</math>

Such a series converges if the real part of ''s'' is greater than a particular number depending on the coefficients ''a''<sub>''n''</sub>: the [[abscissa]] of convergence.