Stanislaw Marcin Ulam was a Polish-American mathematician. He participated in America's Manhattan Project, originated the Teller–Ulam design of thermonuclear weapons, invented the Monte Carlo method of computation, and suggested nuclear pulse propulsion. In pure and applied mathematics, he proved some theorems and proposed several conjectures.
In early 1943, Ulam asked von Neumann to find him a war job. In October, he received an invitation to join an unidentified project near Santa Fe, New Mexico. The letter was signed by Hans Bethe, who had been appointed as leader of the theoretical division of Los Alamos National Laboratory by Robert Oppenheimer, its scientific director. This was Ulam's introduction to the Manhattan Project, which was the US's wartime effort to create the atomic bomb.
He was born on Apr 13, 1909 in Lemberg, Galicia, Austria (now Poland). His parents were Jozef Ulam (1877-1941) and Hania Auerbach Ulam (1887-1938). He obtained his PhD in 1933 from the Lwów Polytechnic Institute in the Ukraine. He married Francoise Aron (1918-2011) in 1941, while serving as an assistant professor at the University of Wisconsin-Madison. They had previously met at Cambridge. They had one daughter, Claire, who was born in New Mexico. They lived at 1142 20th Street, Los Alamos, New Mexico after the war.
Stanislaw had two siblings, Stefania Francesca (Ulam) Kruger (1912-1941) and Adam Brun Ulam (1922-2000).
Stanislaw immigrated to the United States from Poland on the ship Georgic sailing from Harve on Aug 21, 1937 and arrived at the port of Ellis Island, New York, New York on Aug 28, 1937. He became a naturalized U.S. Citizen on Apr 2, 1943 in Madison, Wisconsin. He died on May 13, 1984 in Santa Fe, Santa Fe County, New Mexico, USA. He is buried at the Cimetiere de Montparnasse, City of Paris, France.
Source: "United States Social Security Death Index," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:VSDF-S2V : 20 May 2014), Stanislaw Ulam, May 1984; citing U.S. Social Security Administration, Death Master File, database (Alexandria, Virginia: National Technical Information Service, ongoing).
Source: "Illinois, Northern District Naturalization Index, 1840-1950," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XKPQ-Y2Y : 12 December 2014), Stanislaw Marcin Ulam, 1943; citing Madison, Wisconsin, NARA microfilm publication M1285 (Washington D.C.: National Archives and Records Administration, n.d.), roll 170; FHL microfilm 1,432,170.
"New Mexico Naturalization Records, 1882-1983," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:Q2S5-8Y7B : 25 July 2019), Stanislaw M Ulam, ; citing Immigration, Santa Fe, New Mexico, United States, multiple NAID. Records of District Court of the United States, 1685 - 2009, RG 21. National Archives and Records Administration, Denver, Colorado, n.d., FHL microfilm 100,379,583.
Source: "Find A Grave Index," database, (FamilySearch: 13 December 2015), Stanislaw Marcin Ulam, 1984; Burial, Paris, City of Paris, Île-de-France, France, Cimetière de Montparnasse; citing record ID 7205311, Find a Grave, Stanislaw Marcin Ulam, 1984; Burial, Paris, City of Paris, Île-de-France, France, Cimetière de Montparnasse; citing record ID 7205311, Find a Grave, http://www.findagrave.com.
Source: "United States National Register of Scientific and Technical Personnel Files, 1954-1970," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:KLWS-XN9 : 12 December 2014), Stanislaw Ulam, New Mexico, United States, Dec 1955; citing 1954 National Register of Scientific and Technical Personnel, 622629, National Archives at College Park, Maryland.
Source: Lemberg, Galicia was in the Austrian partition of Poland. When the city returned to Polish rule after the war, it took its Polish name again, Lwów. This was also the birth place of his parents and siblings.
Source: "New York, New York Passenger and Crew Lists, 1909, 1925-1957," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:24YD-ZFY : 2 October 2015), Claire Ulam, 1950; citing Immigration, New York City, New York, United States, NARA microfilm publication T715 (Washington, D.C.: National Archives and Records Administration, n.d.).