Kruskal diagram

Kruskal diagram

[′kru̇s·kəl ‚dī·ə‚gram]
(relativity)
A space-time diagram displaying the Schwarzschild metric in a form that eliminates the formal singularity that appears at the Schwarzschild radius in the form in which the metric is usually written.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.