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Feller was born in Zagreb. In his school documentation, the small municipality of Donja Stubica in Zagorje is mentioned. There is where his father came, the place Eugen Victor Feller was an apothecary and owner of company producing the hygienic utensils and cosmetics.
William finished the elementary and middle education in Zagreb as well as two years of his math study. As for the 1925, he continued his study in Göttingen, Germany where he gained the doctoral degree in 1926Centuries: 19th century 20th century 21st century Decades: 1870s 1880s 1890s 1900s 1910s 1920s 1930s 1940s 1950s 1960s 1970s Years: 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 See also 1926 in aviation 1926 in film 1926 in literature 1926 in mu wit his work Über algebraisch rektifizierbare transzendente Kurven.
Feller held a docentA docent (the word being derived from the Latin word docere meaning to teach) is officially defined as a professor or university lecturer, but the term has been expanded to designate the corps of volunteer guides who staff many of the museums and other ed position at the University of KielThis article is about the city in Germany. There is also Kiel, Wisconsin in the United States of America. Kiel [kiːl], with a population 233,795, (113,274 male, 120,521 female) is a city in northern Germany, capital of the Schleswig-Holstein Bundes since 1928Centuries: 19th century 20th century 21st century Decades: 1870s 1880s 1890s 1900s 1910s 1920s 1930s 1940s 1950s 1960s 1970s Years: 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 See also 1928 in aviation 1928 in film 1928 in literature 1928 in mu. He fled the Nazis and went to DenmarkKongeriget Danmark ( In Detail) Motto of the Queen: Guds hjaelp, Folkets kaerlighed, Danmarks styrke (English: God's help, the love of the people, Denmark's strength) Official language Danish Capital Copenhagen Kobenhavn Monarch Margrethe II Prime Ministe, ( CopenhagenCopenhagen Kobenhavn in Danish) is the capital of Denmark. The contemporary Danish name for the city is a corruption of the original designation for the city Kobmandshavn meaning Merchants' Harbour. The English name Copenhagen is derived from the German n) in 1933Centuries: 19th century 20th century 21st century Decades: 1880s 1890s 1900s 1910s 1920s 1930s 1940s 1950s 1960s 1970s 1980s Years: 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 See also 1933 in aviation 1933 in film 1933 in literature 1933 in mu. He also lectured in Sweden, ( Stockholm and Lund). Finally, in 1939 he arrived to the USA where he became the citizen in 1944 and was on the faculty at Brown and Cornell. With the 1950 he became the teacher at prestigious Princeton University.
The works of Feller are contained in 104 works and two books with variety of topics as mathematical analysis, theory of measurement, functional analysis, geometry, differential equations.
He was the foremost probabilist outside of Russia. In the middle of the 20th century, probability was not generally viewed as a fruitful area of research in mathematics except in Russia, where Kolmogorov and others were influential. Feller contributed to the study of the relationship between Markov chains and differential equations. He wrote a two-volume treatise on probability that has since been universally regarded as one of the most important treatments of that subject.