論黎曼測度V_m在常曲率空間S_(m+1)中的變形 |
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引用本文: | 胡和生. 論黎曼測度V_m在常曲率空間S_(m+1)中的變形[J]. 数学学报, 1956, 6(2): 320-332. DOI: cnki:ISSN:0583-1431.0.1956-02-014 |
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作者姓名: | 胡和生 |
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作者单位: | 中國科学院數學研究所 復旦大學 |
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摘 要: | <正> 在歐氏空間E_(m+1)中的安裝及變形問題在近一世紀的幾何學者的工作中得到了解决,而所確定的V_m E_(m+1)一般是不能變形的。就是說,能够變形的只是狹窄的一類超曲面.運用了外微分形式的方法,很詳細地綜合了這些工作,並且完全地給出
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收稿时间: | 1955-10-10 |
ON THE DEFORMATION OF A RIEMANNIAN METRIC V_m IN A SPACE OF CONSTANT CURVATURE S_(m+1) |
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Affiliation: | HU HOU-SUNG(Institute of Mathematics, Academia Sinica and Fuh-tan University) |
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Abstract: | With the aid of the method of exterior differential forms N. N. Yanenko has recently given a complete classification of the deformation of m dimensional Riemannian metric ds~2 = gii du~i du~i (i,j=1,…,m) in Euclidean space E_(m+1). Here we propose to investigate the same problem in a space S_(m+1) of constant curvature k_(om+1). Introducing the definition of the k_o-rank of a metric, we obtain the following results:1. In general, a V_m S_(m+1) is indeformable and the only possible deformable metric must be of k_o-rank ≤ 2 (an extension of Beez's Theorem).2. When k_o-rank ≥4, the Peterson-Codazzi equations are consequences of Gauss equations (an extension of T. Y. Thomas' Theorem).A complete classification of deformable hypersur faces V_m S_(m+1) is given. |
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