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arXiv 0704.0595math.DGgr-qchep-thmath-phmath.APmath.MP
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关于曲率、共形度量和翘曲积

About curvature, conformal metrics and warped products

Fernando Dobarro, Bulent Unal

摘要:

我们考虑两个伪黎曼流形$(B,g_B)$和$(F,g_F)$的翘积族的曲率,这两个流形具有$c^{2}g_B \oplus w^2 g_F$形式的度量,特别是$w^{2 μ}g_B \oplus w^2 g_F$类型的度量,其中$c, w \colon B \to (0,\infty)$是光滑函数,$μ$是实参数.我们得到合适的表达式的Ricci张量和数量曲率的产品,使我们能够建立爱因斯坦或常数数量曲率结构的存在,在这些类别的结果。如果$(B,g_B)$是黎曼的,则后一个问题涉及具有凹凸非线性的非线性椭圆偏微分方程和Lichnerowicz-York型的奇异偏微分方程等。

英文摘要:

We consider the curvature of a family of warped products of two pseduo-Riemannian manifolds $(B,g_B)$ and $(F,g_F)$ furnished with metrics of the form $c^{2}g_B \oplus w^2 g_F$ and, in particular, of the type $w^{2 μ}g_B \oplus w^2 g_F$, where $c, w \colon B \to (0,\infty)$ are smooth functions and $μ$ is a real parameter. We obtain suitable expressions for the Ricci tensor and scalar curvature of such products that allow us to establish results about the existence of Einstein or constant scalar curvature structures in these categories. If $(B,g_B)$ is Riemannian, the latter question involves nonlinear elliptic partial differential equations with concave-convex nonlinearities and singular partial differential equations of the Lichnerowicz-York type among others.

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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