Librería Samer Atenea
Kálamo Books
Librería Elías (Asturias)
Librería Kolima (Madrid)
Librería Proteo (Málaga)
The subject manner in this book is NOT based on Euclidean geometry, but is based on spherical geometry (a form of non-Euclidean geometry). There are harmonic relationships between conical circles on a sphere’s surface and all of the Platonic solids.