- Metric Spaces: Distance as an Axiomages 20 to 21 · on the way
- Open Sets, Closed Sets and Limit Pointsages 20 to 21 · on the way
- Completeness and the Contraction Mapping Theoremages 21 to 22 · on the way
- Compactness in Metric Spacesages 21 to 22 · on the way
- Topological Spaces: Continuity Without Distanceages 23 to 24 · on the way
- Compactness and Connectednessages 23 to 24 · on the way
- The Fundamental Group and Loops on a Circleages 23 to 24 · on the way