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.
