Non-Euclidean geometry; a critical and historical study of its development (1912)
Bonola, Roberto, 1874-1911, Carslaw, H. S. (Horatio Scott), 1870-1954 · LaSalle, Ill. : Open Court Publishing Co. · leaf 148
d for vSurfaces of Constant Curvature, shows that surfaces,freely movable upon themselves, are characterised by constancy ofcurvature. ^ The tractrix is the curve in which the distance from the Surfaces of Constant Curvature. 133 of rotation z, and to a suitably chosen axis of ;c perpendicularto z,… … Surface of Constant Negative Curvature.^Fig. 56. point of contact of a tangent to the point where it cuts itsasymptote is constant. I Fig. 56 is reproduced from a photograph ef a surface con-structed by Beltrami. The actual model belongs to the collectionof models in the Mathematical Institute of…
Geometry, Non-Euclidean
Internet Archive · California Digital Library · Public Domain Mark 1.0. Free to use for anything.
