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Giuseppe Vitali : ウィキペディア英語版 | Giuseppe Vitali
Giuseppe Vitali (26 August 1875 – 29 February 1932) was an Italian mathematician who worked in several branches of mathematical analysis. == Mathematical contributions == Vitali was the first to give an example of a non-measurable subset of real numbers, see Vitali set. His covering theorem is a fundamental result in measure theory. He also proved several theorems concerning convergence of sequences of measurable and holomorphic functions. Vitali convergence theorem generalizes Lebesgue's dominated convergence theorem. Another theorem bearing his name gives a sufficient condition for the uniform convergence of a sequence of holomorphic functions on an open domain. This result has been generalized to normal families of meromorphic functions, holomorphic functions of several complex variables, and so on. In the last part of his life, he also worked on absolute differential calculus and on the geometry of Hilbert spaces.〔G. Vitali, ''Una derivazione covariante formata coll’ausilio di n sistemi covarianti del 1 ordine'', Atti della Soc. Linguistica di Sc. e Lett. 2 (1924), 248-253.〕〔G. Vitali, ''Intorno ad una derivazione nel calcolo assoluto'', Atti della Soc. Linguistica di Sc. e Lett. 4 (1925), 287-291.〕
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