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arXiv 1507.03038math.DG
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梯度Ricci几乎孤子弯曲积

Gradient Ricci almost soliton warped product

F. E. S. Feitosa, A. A. Freitas Filho, J. N. V. Gomes, R. S. Pina

摘要:

给出了构造作为翘曲积的梯度Ricci几乎孤子的充要条件。这将通过Bishop-O 'Neill公式和满足Ricci-Hessian型方程的黎曼流形的特殊研究来完成。我们证明了存在性结果,并给出了一个例子的特解的偏微分方程,产生于我们的建设。我们还证明了梯度Ricci孤子黎曼乘积在梯度Ricci几乎孤子弯曲乘积类中的刚性结果,在一些自然几何假设下的弯曲函数。

英文摘要:

We present the necessary and sufficient conditions for constructing gradient Ricci almost solitons that are realized as warped products. This will be done by means of Bishop-O'Neill's formulas and a particular study of Riemannian manifolds satisfying a Ricci-Hessian type equation. We prove existence results and give an example of particular solutions of the PDEs that arise from our construction. We also prove a rigidity result for a gradient Ricci soliton Riemannian product in the class of gradient Ricci almost soliton warped products under some natural geometric assumptions on the warping function.

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