1. Background
2. Syntax and Semantics of Diagrams
3. Diagrammatic Proofs
4. Meta-mathematical Results
5. Conclusions
Appendix A: Euclid's Postulates
Appendix B: Hilbert's Axioms
Appendix C: Isabel Luengo's DS1
Appendix D: A CDEG transcript
References
Index
Nathaniel Miller is assistant professor of mathematical sciences at the University of Northern Colorado.