Einstein: Geometry in the Real World

"Geometry and Experience" by Albert Einstein

A completely new English translation - 2025!

This book is based on the public lecture given by Einstein before the Prussian Academy of Sciences, in 1921, titled "Geometry and Experience".

In this lecture, Einstein explores the relationship between geometry and physics, especially the general theory of relativity. Why does this theory based on mathematics describe nature so well? Einstein introduces a few fundamental hypotheses which make geometry essentially a branch of physics. He also explores the question of the shape of the universe in this lecture, which still remains to be an open question after over 100 years.

A must read for Einstein enthusiasts, and anyone who is interested in the relationship between non-Euclidean geometry and general relativity at the fundamental level.

Note: This article, "Geometry and Experience", by Einstein and the Translator's notes are also included in the book, "Einstein's Seven Essays on Relativity, Geometry, and Scientific Methods" (2025).