# Tag Info

Questions about the properties of functions of the form $\sum_{n=0}^{\infty}a_n x^n$, where the $a_n$ are real or complex numbers, and $x$ is real or complex (or more generally an element of a Banach algebra).
The series of the form $$\sum_{n=0}^{\infty} a_n x^n$$ is called a power series.