János Bolyai: Appendix, scientiam spatii absolute veram exhibens. Maros-Vásárhelyini, 1832
Documentary heritage submitted by Hungary and recommended for inclusion in the Memory of the World Register in 2009.
Appendix is an outstanding document in the history of mathematics and human culture. It presents the solution of a more than two thousand year old problem in connection with parallel lines and the description of János Bolyai's discovery of non-Euclidean and the more general absolute geometries. Non-Euclidean geometry changed our thinking not only about geometry, but mathematics, in general, and paved the way for the creation of the modern physical theories of the twentieth century.