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不定復(fù)空間型中具有常數(shù)量曲率的完備全實(shí)2—調(diào)和類空子流形

2016-06-25 06:41陳亞力宋衛(wèi)東
關(guān)鍵詞:曲率調(diào)和分類號

陳亞力+宋衛(wèi)東

摘 要 設(shè)CPn+pn2+p(4)是具有常全純截面曲率4的復(fù)n+p維不定復(fù)空間形.Mn是CPn+pn2+p(4)中常數(shù)量曲率的完備全實(shí)2-調(diào)和類空子流形,H表示Mn的平均曲率.本文利用活動標(biāo)架法和廣義極大值原理研究了不定復(fù)射影空間中具有常數(shù)量曲率的2-調(diào)和類空子流形,得到Mn關(guān)于H的Pinching定理.

關(guān)鍵詞 不定復(fù)空間;完備;2-調(diào)和;類空

中圖分類號 O18615 文獻(xiàn)標(biāo)識碼 A 文章編號 1000-2537(2016)03-0069-06

Abstract Let CPn+pn2+p(4) be an indefinite complex space form of complex dimension n+p, with constant holomorphic sectional curvature 4. Mn is a complete totally real space-like biharmonic sub-manifold with constant scalar curvature in CPn+pn2+p(4). H is denoted by mean curvature. In this paper, the indefinite complex space form with constant scalar curvature in the complete space-like biharmonic submanifold is discussed by using moving-frame method and generalized maximum principle. Some pinching theorems about H for Mn are obtained.

Key words indefinite complex space form; complete; biharmonic; space-like

參考文獻(xiàn):

[1] CHOI Y S, KWON J H, SUH Y J. On semi-Ryan complex submanifolds in an indefinite complex space form[J]. Rocky Moun J Math, 2001,31(3):873-897.

[2] KENDALL D G. Shape manifolds, procrustean metrics, and complex projective spaces[J]. Bull London Math Soc, 1984,16(2): 81-121.

[3] DONG Y. On indefinite special Lagrangian submanifolds in indefinite complex Euclidean spaces[J]. J Geom Phys, 2009,59(6):710-726.

[4] ERDEM S, GLAZEBROOK J F. Harmonic maps of Riemann surfaces to indefinite complex hyperbolic and projective spaces[J]. Proc London Math Soc, 1983,3(3):547-562.

[5] 孫華飛.不定復(fù)空間型中的全實(shí)極大類空子流形[J].東北大學(xué)學(xué)報, 1994,15(5):547-550.

[6] VRANCKEN L. Minimal Lagrangian submanifolds with constant sectional curvature in indefinite complex space forms[J]. Proc Am Math Soc, 2002,130(5):1459-1466.

[7] CHENG Q. Complete space-like submanifolds in a de Sitter space with parallel mean curvature vector[J]. Math Zeit, 1991,206(1):333-339.

[8] YAU S T. Submanifolds with constant mean curvature[J]. Am J Math, 1974,96(2):346-366.

[9] CHEN B, OGIUE K. On totally real submanifolds[J]. Trans Am Math Soc, 1974,193:257-266.

[10] ROMERO A, SUH Y J. Dierential geometry of indefinite complex submanifolds in indefinite complex space forms[J]. Extr Math, 2004,19(3):339-398.

[11] 歐陽崇珍.偽黎曼空間型的2-調(diào)和類空子流形[J].數(shù)學(xué)年刊:A輯, 2000,21(6):649-654.

[12] OMORI H. Isometric immersions of Riemannian manifolds[J]. J Math Soc Jap, 1967,19(2):205-214.

[13] YAU S T. Harmonic functions on complete Riemannian manifolds[J]. Comm Pure Appl Math, 1975,28(2):201-228.

[14] 紀(jì)永強(qiáng).子流形幾何[M].北京:科學(xué)出版社, 2003.

(編輯 HWJ)

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