* 1939 – 1945, the Second Battle of the Atlantic.

Subsequent formalizations were framed as attempts to define " effective calculability " or " effective method "; those formalizations included the Gödel – Herbrand – Kleene recursive functions of 1930, 1934 and 1935, Alonzo Church's lambda calculus of 1936, Emil Post's " Formulation 1 " of 1936, and Alan Turing's Turing machines of 1936 – 7 and 1939.

* 1890 – Anthony Fokker, Dutch aviation engineer ( d. 1939 )

* 1852 – Ferdinand von Lindemann, German mathematician ( d. 1939 )

* 1939 – Alan Ayckbourn, English writer

* 1939 – Johnny Raper, Australian rugby league footballer

* 1939 – The 1939-40 New York World's Fair opens.

* 1939 – NBC inaugurates its regularly scheduled television service in New York City, broadcasting President Franklin D. Roosevelt's N. Y. World's Fair opening day ceremonial address.

* 1939 – First flight of the turbojet-powered Heinkel He 178, the world's first jet aircraft.

* 1939 – William Least Heat-Moon, American author

* 1939 – Edward Patten, American singer-songwriter and producer ( Gladys Knight & the Pips ) ( d. 2005 )

* 1939 – Bulle Ogier, French actress

* 1939 – Romano Prodi, Italian politician and statesman

* 1939 – Hércules Brito Ruas, Brazilian footballer

* 1939 – Albert Einstein and Leó Szilárd write a letter to Franklin D. Roosevelt, urging him to begin the Manhattan Project to develop a nuclear weapon.

* 1939 – Benjamin Barber, American theorist

* 1939 – Wes Craven, American director

* 1939 – John W. Snow, American politician, 73rd United States Secretary of the Treasury

* 1984 – Marvin Gaye, American singer ( The Moonglows ) ( b. 1939 )

* 2001 – Trinh Cong Son, Vietnamese composer ( b. 1939 )

Eastern European theorists include Pyotr Stolypin ( 1862 – 1911 ) and Alexander Chayanov ( 1888 – 1939 ) in Russia ; Adolph Wagner ( 1835 – 1917 ), and Karl Oldenberg in Germany, and Bolesław Limanowski ( 1835 – 1935 ) in Poland.

In 1939, André Breton coined the derogatory nickname " Avida Dollars ", an anagram for " Salvador Dalí ", and a phonetic rendering of the French avide à dollars, which may be translated as " eager for dollars ".

* " Fata Morgana ", a 1939 poem by André Breton

* French — Alleaume, Ludovic: Poor Pierrot ( 1915 ); Derain, André: Pierrot ( 1923 – 1924 ), Harlequin and Pierrot ( c. 1924 ); Gabain, Ethel: Many works, including Pierrot ( 1916 ), Pierrot's Love-letter ( 1917 ), and Unfaithful Pierrot ( 1919 ); La Fresnaye, Roger de: Study for " Pierrot " ( 1921 ); La Touche, Gaston de: Pierrot's Greeting ( n. d .); Laurens, Henri: Pierrot ( c. 1922 ); Matisse, Henri: The Burial of Pierrot ( 1943 ); Mossa, Gustav Adolf: Pierrot and the Chimera ( 1906 ), Pierrot Takes His Leave ( 1906 ), Pierrot and His Doll ( 1907 ); Picabia, Francis: Pierrot ( early 1930s ); Renoir, Pierre-Auguste: White Pierrot ( 1901 / 1902 ); Rouault, Georges: Many works, including White Pierrot ( 1911 ), Pierrot ( 1920 ), Pierrot ( 1937 – 1938 ), Pierrot ( or Pierrette ) ( 1939 ), Aristocratic Pierrot ( 1942 ), The Wise Pierrot ( 1943 ), Blue Pierrots with Bouquet ( c. 1946 ).

* André Gerschel ( 1939 – 1940 )

There, he rejoined many intellectuals, including the Surrealists, with whom he had been associated since he met André Breton in 1939.

* Chambrun, René de, Mission and Betrayal 1939 – 1945, London: André Deutch Ltd., 1993

* Le héros de la Marne ( André Hugon ), 1939

After 1928, he stayed again in Cassis and Paris, studied shortly with Fernand Léger and became a member of the group Abstraction-Creation in 1933 and the Parisian Surrealists around André Breton in 1936, participating in all its major exhibitions and outreach thereafter, until he travelled to New York in May 1939.

Between 1927 and 1939, he attended the Paris Conservatoire and achieved First Prize in Harmony under André Bloch and First Prize in Fugue with Georges Caussade.

* Oscar Wallenberg ( 1872 – 1939 ), son of André Oscar Wallenberg, naval officer and businessman.

In 1939 and advised by Profesor André Siegfried, Reichel arrives to Colombia.

In 1939, she reunited with André Kostelanetz for Tune-Up Time ( CBS ), a show that was produced by radio legend William Spier ( who later married Kay in 1942 ).

* 1939 – Jean-Claude Germain, French-Canadian author, journalist, and historian

* 1939 – Michael D. Antonovich, American politician

* 1939 – Roy Romanow, Canadian politician

* 1939 – Festus Mogae, Botswana politician, 3rd President of Botswana

* 1939 – Charlie Rose, American politician ( d. 2012 )

* 1939 – Joseph Lyons, Australian politician, 10th Prime Minister of Australia ( b. 1879 )

* Aleke Banda ( 1939 – 2010 ), Malawian politician

* 1939 – Yael Dayan, Israeli writer and politician

* 1939 – Francis Fox, Canadian politician, member of the Senate

* 1939 – Harry Reid, American politician

* 1939 – Tom Hayden, American politician and activist

* 1891 – Vlas Chubar, Soviet politician ( d. 1939 )

* 1939 – Orlando Parga, Puerto Rican politician

* 1939 – Tadahiro Matsushita, Japanese politician ( d. 2012 )

* 2011 – Miltiadis Evert, Greek politician ( b. 1939 )

Gro Harlem Brundtland () ( born Gro Harlem, 20 April 1939 ) is a Norwegian Social democratic politician, diplomat, and physician, and an international leader in sustainable development and public health.

* 1939 – Frank McCloskey, American politician ( d. 2003 )

* 1939 – Ahmet Taner Kışlalı, Turkish politician, journalist, and educator ( d. 1999 )

* 1939 – Brooks Firestone, American businessman and politician

* 1939 – Gabriel Romanus, Swedish politician

* 1939 – László Kovács, Hungarian politician and diplomat

* 1865 – Philipp Scheidemann, German politician, 10th Chancellor of Germany ( d. 1939 )

* 1939 – John Howard, Australian politician, 25th Prime Minister of Australia