Foreword: MASS and REU at Penn State University
Preface
Chapter 1.Prelude: Love, Hate, and Exponentials
§1.1.Two sets of travelers
§1.2.Winding around
§1.3.The most important function in mathematics
§1.4.Exercises
Chapter 2.Paths and Homotopies
§2.1.Path connectedness
§2.2.Homotopy
§2.3.Homotopies and simple-connectivity
§2.4.Exercises
Chapter 3.The Winding Number
§3.1.Maps to the punctured plane
§3.2.The winding number
§3.3.Computing winding numbers
§3.4.Smooth paths and loops
§3.5.Counting roots via winding numbers
§3.6.Exercises
Chapter 4.Topology of the Plane
§4.1.Some classic theorems
§4.2.The Jordan curve theorem Ⅰ
§4.3.The Jordan curve theorem Ⅱ
§4.4.Inside the Jordan curve
§4.5.Exercises
Chapter 5.Integrals and the Winding Number
§5.1.Differential forms and integration
§5.2.Closed and exact forms
§5.3.The winding number via integration
§5.4.Homology
§5.5.Cauchy's theorem
§5.6.A glimpse at higher dimensions
§5.7.Exercises
Chapter 6.Vector Fields and the Rotation Number
§6.1.The rotation number
§6.2.Curvature and the rotation number
§6.3.Vector fields and singularities
§6.4.Vector fields and surfaces
§6.5.Exercises
Chapter 7.The Winding Number in Functional Analysis
§7.1.The Fredholm index
§7.2.Atkinson's theorem
§7.3.Toeplitz operators
§7.4.The Toeplitz index theorem
§7.5.Exercises
Chapter 8.Coverings and the Fundamental Group
§8.1.The fundamental group
§8.2.Covering and lifting
§8.3.Group actions
§8.4.Examples