LANCZOS, KORNEL.

Über die Rotverschiebung in der de Sitterschen Welt.

Berlin, Julius Springer, 1923. 8vo. Bound in contemporary half cloth with gilt lettering to spine. Library stamp to front free end paper and titel page. A heavy bump to lower part of boards. In "Zeitschrift für Physik", bd. 17. Fine and clean. Pp. 168-89. [Entire volume: IV, 424 pp.].

First printing of Lanczos important paper in which he clearified the nature of the Event Horizon of Black Hole that r = (pi*R)/2 in the De Sitter solution corresponds to an event horizon and not to a singularity.

Order-nr.: 48938