Here we cover series. As usual no proofs, but still lots of theorems
accompanied by explanations.

These sections should be read in order, each chapter is a necessary
prerequisite for the ones that follow.

- Introduction to series: basic properties and operations, important examples. Summing up series (geometric, telescopic, approximation). Absolute convergence.
- Testing convergence: tests for series with non-negative terms, alternating series, general series.
- Sequences and series of functions, in particular power/Taylor series and Fourier series, applications of series.