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673(2): １３２人目の素数さん [] 2023/03/22(水)18:27 ID:Ht45tQPR(5/5)
Levi-Civita connectionとCartan connectionは有名だが
Levi problemも有名
674(1): １３２人目の素数さん [] 2023/03/22(水)20:52 ID:wwAtSX6R(1/2)
>>672-673
ありがとう
初耳ですが、下記ですね（文字化け直さず）
英語版
https://en.wikipedia.org/wiki/Eugenio_Elia_Levi
Eugenio Elia Levi (18 October 1883 ? 28 October 1917) was an Italian mathematician, known for his fundamental contributions in group theory, in the theory of partial differential operators and in the theory of functions of several complex variables. He was a younger brother of Beppo Levi and was killed in action during First World War.
イタリア語（google訳 英→伊）
https://it.wikipedia.org/wiki/Eugenio_Elia_Levi
Eugenio Elia Levi
Biography
He took part as a volunteer in the First World War and died in Subida, in 1917, in a desperate attempt to stop the enemy advance after the defeat of Caporetto . Francesco Tricomi said that he ≪can be considered one of the greatest Italian mathematicians≫ [1] and many agree in believing his premature death - and a similar fate awaited many other young Italian mathematicians, including Ruggiero Torelli and Luciano Orlando - such as greatest tribute paid by Italian mathematics to the great war . [2] [3]
https://en.wikipedia.org/wiki/Stein_manifold
Stein manifold
つづく
681(3): １３２人目の素数さん [] 2023/03/23(木)13:40 ID:gtBUMZjM(1/5)
>>673
>Levi problemも有名
まるほど
下記か、”The Levi problem for Cn was affirmatively solved in 1953?1954 independently by K. Oka, H. Bremermann and F. Norguet, and Oka solved the problem in a more general formulation, concerned with domains spread over Cn ( cf. Covering domain) (see ?[6]).”
岡先生ね
とすると、>>675 シュタイン多様体 "X 内でコンパクトとなるようなものである。これはいわゆる、エフジェニオ・エリア・レヴィ（英語版）(Eugenio Elia Levi) (1911) にちなんで名付けられたレヴィ問題の解でもある[1]"
とも、対応しているね
不勉強で、初めて知りました
https://encyclopediaofmath.org/wiki/Levi_problem
Levi problem Encyclopedia of Mathematics
The problem of the geometric characterization of domains in a given analytic space that are Stein spaces (cf. Stein space); it was posed by E.E. Levi [1] for domains in the affine space Cn
in the following form. Let D
略
The Levi problem for Cn
was affirmatively solved in 1953?1954 independently by K. Oka, H. Bremermann and F. Norguet, and Oka solved the problem in a more general formulation, concerned with domains spread over Cn
( cf. Covering domain) (see ?[6]).
つづく
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