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arXiv math/0502482math.DGmath-phmath.MP
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由CP ^N sigma模型得到的浸入su(N+1)李代数的曲面

Surfaces immersed in su(N+1) Lie algebras obtained from the CP^N sigma models

A. M. Grundland, A. Strasburger, W. J. Zakrzewski

摘要:

本文从CP^N sigma模型的研究出发,研究了二维可定向曲面的一些几何性质。为此,我们利用R^(N(N+2))与李代数su(N+1)的同一性,构造了这类曲面浸入的广义Weierstrass公式。用CP^N模型的解来表示曲面的结构元素,如活动标架、Gauss-Weingarten方程和Gauss-Codazzi-Ricci方程,进而用CP^N模型的解来表示曲面的第一和第二基本型、高斯曲率、中曲率向量、Willmore泛函和拓扑荷.我们给出了浸入su(2)和su(3)李代数的曲面的这些结果的详细实现。

英文摘要:

We study some geometrical aspects of two dimensional orientable surfaces arrising from the study of CP^N sigma models. To this aim we employ an identification of R^(N(N+2)) with the Lie algebra su(N+1) by means of which we construct a generalized Weierstrass formula for immersion of such surfaces. The structural elements of the surface like its moving frame, the Gauss-Weingarten and the Gauss-Codazzi-Ricci equations are expressed in terms of the solution of the CP^N model defining it. Further, the first and second fundamental forms, the Gaussian curvature, the mean curvature vector, the Willmore functional and the topological charge of surfaces are expressed in terms of this solution. We present detailed implementation of these results for surfaces immersed in su(2) and su(3) Lie algebras.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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