"Version: 20161001"--Title page version.Includes bibliographical references.Preface -- 1. Mathematical introduction -- 1.1. Introduction to the calculus of variations -- 1.2. Vectors2. The concept of charge -- 2.1. Electric charge -- 2.2. Electrification -- 2.3. Some properties of charges -- 2.4. Coulomb's law3. Electrostatics -- 3.1. Introduction and the need for the concept of fields -- 3.2. …