Cornelius Lanczos (1893-1974) can be considered so to speak as the third inventor of the cg-method. He was a very original physicist and mathematician of Jewish Hungarian descent who had a profound impact on the foundations of twentieth century science. His papers cover a vast array of disciplines, including general relativity, quantum mechanics, scientific computation, applied mathematics and numerical analysis. Lanczos was indeed one of the twentieth century's most versatile and innovative scientific minds, and many of Lanczos' ideas are still of interest to present-day research in physics and applied mathematics.
	During the period when this picture was taken Lanczos wrote up his version of the cg-method which he called a method of "Minimized Iterations." In addition he devised a special iteration for solving large systems of linear equations.