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Alfred Leon Foster (1904-1994) was an American mathematician. He was a professor at the University of California, Berkeley from 1934 until 1971. In 1932 he was an Invited Speaker at the ICM in Zürich. In 1934 he accepted a regular position at Berkeley. At that time Griffith Evans was Head of the Mathematics Department and was charged by President Sproul with building a first-class mathematics center, which he did. Alfred Foster and Charles Morrey (who became the first department chairman after Evans' retirement) were Evans' first two appointments. Except for subsequent sabbatical leaves, spent most notably in Freiburg and Tübingen, Foster served continuously at Berkeley until his retirement at the then-mandatory age of 67 in 1971.

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  • Alfred Foster (Nova York, 13 de juliol de 1904 - Berkeley, 24 de desembre de 1994) va ser un matemàtic estatunidenc. Foster va estudiar matemàtiques al Institut Tecnològic de Califòrnia on es va graduar el 1926, a continuació va estudiar pel doctorat a la universitat de Princeton, en la qual es va doctorar el 1931 amb una tesi dirigida per Alonzo Church. Després de casar-se amb la seva col·lega Else Wagner, van marxar a fer estudis post-doctorals a la universitat de Göttingen i en retornar, va acceptar una plaça docent a la universitat de Berkeley el 1934. Foster va fer tota la seva carrera acadèmica a Berkeley, excepte alguns anys sabàtics en que va ser professor visitant a universitats alemanyes. Es va jubilar el 1971 i va continuar com professor emèrit fins pràcticament la seva mort el 1994. En morir, i seguint la seva voluntat, va ser incinerat i les cendres llençades a l'oceà Pacífic. Com deixeble de Church, va iniciar els seus treballs de recerca en el camp de la lògica, però aviat es va inclinar cap a l'anàlisi de l'àlgebra. Amb el seu treball va connectar les àlgebres de Boole amb les àlgebres universals, a través del concepte d'àlgebra completa. (ca)
  • Alfred Leon Foster (1904-1994) was an American mathematician. He was a professor at the University of California, Berkeley from 1934 until 1971. In 1932 he was an Invited Speaker at the ICM in Zürich. In 1934 he accepted a regular position at Berkeley. At that time Griffith Evans was Head of the Mathematics Department and was charged by President Sproul with building a first-class mathematics center, which he did. Alfred Foster and Charles Morrey (who became the first department chairman after Evans' retirement) were Evans' first two appointments. Except for subsequent sabbatical leaves, spent most notably in Freiburg and Tübingen, Foster served continuously at Berkeley until his retirement at the then-mandatory age of 67 in 1971. Foster's Ph.D. dissertation and his first few papers were in the area of mathematical logic. Starting from this point, he soon focused his interest on the related theory of Boolean algebras and Boolean rings, and was thus led from logic to algebra. He extensively studied the role of duality in Boolean theory and subsequently developed a theory of n-ality for certain rings which played for n-valued logics the role of Boolean rings vis-a-vis Boolean algebras. The late Benjamin Bernstein of the Berkeley mathematics faculty was his collaborator in some of this research. This work culminated in his seminal paper “The theory of Boolean-like rings” appearing in 1946. Foster was married to Else Wagner; their marriage produced four children and eight grandchildren. (en)
  • Alfred Leon Foster (conhecido como Alfred Foster; Nova Iorque, 13 de julho de 1904 – Berkeley, Califórnia, 24 de dezembro de 1994) foi um matemático estadunidense. Foi professor da Universidade da Califórnia em Berkeley de 1934 a 1971. Foi palestrante convidado do Congresso Internacional de Matemáticos em Zurique (1932). Obteve um doutorado em 1930 na Universidade de Princeton, orientado por Alonzo Church, com a tese Formal Logic in Finite Terms. Em 1934 aceitou um cargo na Universidade da Califórnia em Berkeley. Naquela época Griffith Conrad Evans era chefe do Departamento de Matemática e foi encarregado pelo reitor Sproul em organizar um centro de matemática de destaque, o que ele fez. Alfred Foster e Charles Morrey (que tornou-se o primeiro catedrático do departamento depois da aposentadoria de Evans) foram as duas primeiras indicações de Evans. Exceto por licenças sabáticas subsequentes, passadas principalmente Universidade de Freiburg e Universidade de Tübingen, Foster trabalhou continuamente em Berkeley até sua aposentadoria em 1971, com a idade então obrigatória de 67 anos. A tese de Ph.D. de Foster dissertação e seus primeiros artigos foram na área da lógica matemática. A partir desse ponto ele logo focou seu interesse na teoria relacionada de álgebra booleana e anéis booleanos, e foi assim conduzido da lógica à álgebra. Ele estudou extensivamente o papel da na teoria booleana e subsequentemente desenvolveu uma teoria da igualdade para certos anéis que desempenhavam para lógica multivalorada o papel dos anéis booleanos em relação às álgebras booleanas. Seu colega de faculdade Benjamin Abram Bernstein foi seu colaborador em algumas dessas pesquisas. Este trabalho culminou em seu artigo seminal “The theory of Boolean-like rings”, publicado em 1946. Foster casou com Else Wagner; tendo o casal quatro filhos e oito netos. (pt)
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  • 1904-07-13 (xsd:date)
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  • 1904-07-13 (xsd:date)
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  • New York City, New York, United States (en)
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  • Berkeley, California, United States (en)
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  • Alfred Leon Foster (en)
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  • Else Wagner (en)
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  • 'Formal Logic in Finite Terms' (en)
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  • Alfred Foster (Nova York, 13 de juliol de 1904 - Berkeley, 24 de desembre de 1994) va ser un matemàtic estatunidenc. Foster va estudiar matemàtiques al Institut Tecnològic de Califòrnia on es va graduar el 1926, a continuació va estudiar pel doctorat a la universitat de Princeton, en la qual es va doctorar el 1931 amb una tesi dirigida per Alonzo Church. Després de casar-se amb la seva col·lega Else Wagner, van marxar a fer estudis post-doctorals a la universitat de Göttingen i en retornar, va acceptar una plaça docent a la universitat de Berkeley el 1934. Foster va fer tota la seva carrera acadèmica a Berkeley, excepte alguns anys sabàtics en que va ser professor visitant a universitats alemanyes. Es va jubilar el 1971 i va continuar com professor emèrit fins pràcticament la seva mort el (ca)
  • Alfred Leon Foster (1904-1994) was an American mathematician. He was a professor at the University of California, Berkeley from 1934 until 1971. In 1932 he was an Invited Speaker at the ICM in Zürich. In 1934 he accepted a regular position at Berkeley. At that time Griffith Evans was Head of the Mathematics Department and was charged by President Sproul with building a first-class mathematics center, which he did. Alfred Foster and Charles Morrey (who became the first department chairman after Evans' retirement) were Evans' first two appointments. Except for subsequent sabbatical leaves, spent most notably in Freiburg and Tübingen, Foster served continuously at Berkeley until his retirement at the then-mandatory age of 67 in 1971. (en)
  • Alfred Leon Foster (conhecido como Alfred Foster; Nova Iorque, 13 de julho de 1904 – Berkeley, Califórnia, 24 de dezembro de 1994) foi um matemático estadunidense. Foi professor da Universidade da Califórnia em Berkeley de 1934 a 1971. Foi palestrante convidado do Congresso Internacional de Matemáticos em Zurique (1932). Obteve um doutorado em 1930 na Universidade de Princeton, orientado por Alonzo Church, com a tese Formal Logic in Finite Terms. Foster casou com Else Wagner; tendo o casal quatro filhos e oito netos. (pt)
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  • Alfred Foster (ca)
  • Alfred Foster (mathematician) (en)
  • Alfred Leon Foster (pt)
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  • Alfred Leon Foster (en)
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