An Elementary Course in Synthetic Projective Geometry

"An Elementary Course in Synthetic Projective Geometry" by Derrick Norman Lehmer is an early 20th-century academic text that explores the core ideas of synthetic projective geometry in a way that is designed to welcome college students, and potentially high schoolers, into the subject. The publication highlights the value of grasping geometric structures and connections without relying on measurement, with focus on one-to-one relationships and projective attributes. The text starts with the author describing his goals and teaching methods, differing from standard approaches to give a more understandable introduction to synthetic projective geometry, with solid foundations laid out for the reader and suggesting that those knowledgable in analytical geometry and calculus may grasp the contents more easily. This basis prepares readers for a more in-depth investigation of projective connections, constructions, and theorems detailed in later chapters.