The textual narrative, diagrams, proposition layout, page structure, and accompanying images in the following directories are © David E. Joyce, used by his permission:
Dr. Joyce created these materials between 1996 and 2020 for his online Elements edition at Clark University. Nelson Brown received permission in May 2026 to republish the content and port the underlying applet to TypeScript as geomlib.
Third parties wishing to redistribute Dr. Joyce’s narrative content should obtain separate permission from him.
All rights are reserved for narrative content on this site. Web links may be freely made to either the original at Clark University or this site.
The TypeScript library is open source under the MIT License with joint copyright: © 1996–2020 David E. Joyce, 2019–2026 Nelson Brown. Source available at github.com/brownnrl/euclid and published on npm as @brownnrl/geomlib.