Alfonso's Rectifying the Curved

This volume offers a new English translation, introduction, and detailed commentary on  Sefer Meyasher 'Aqov , ( The Rectifying of the Curved ), a 14th-century Hebrew treatise on the foundation of geometry. The book is a mixture of two genres: philosophical discussion and formal, Euclidean-type geometrical writing. A central issue is the use of motion and superposition in geometry, which is analyzed in depth through dialog with earlier Arab mathematicians. The author, Alfonso, was identifie