Non-Euclidean geometry

In 1870, William Kingdon Clifford, introducing the details of non-Euclidean geometry to the English, raised the question of "variation in the curvature of space," describing it as "analogous to little hills on the surface [of the Earth] which is on average flat," that "the ordinary laws of geometry are not valid in them[, and] that this property of being curved or distorted is continually being passed on from one portion of space to another after the manner of a wave" […].

— Sciencetimeline.net

In mathematics, **non-Euclidean geometry** is a small set of geometries based on axioms closely related to those specifying Euclidean geometry. In the writings of HPL, the concept is… *somewhat larger*.

page revision: 1, last edited: 25 Apr 2013 19:53