By HEATHER MCCLENAHAN
Los Alamos Historical Society
Stan Ulam may be one of the least known of the leading Manhattan Project scientists. A Polish-born mathematician, he was working as an assistant professor at the University of Wisconsin-Madison, when he received a letter from physicist Hans Bethe, inviting him to join a wartime project near Santa Fe, NM. He would spend most of the rest of his career working on complex nuclear problems or mathematical issues related to them, such as high-capacity computing.
As part of the Manhattan Project, Ulam, with John von Neumann and others, made the necessary mathematical calculations for the development of the “Fat Man” implosion weapon.
These articles are written by the Los Alamos Historical Society Staff. Many of these articles were originally published by the