Journal of the Mathematical Society of Japan

Stable solutions of the Yamabe equation on non-compact manifolds

Jimmy PETEAN and Juan Miguel RUIZ

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We consider the Yamabe equation on a complete non-compact Riemannian manifold and study the condition of stability of solutions. If $(M^m ,g)$ is a closed manifold of constant positive scalar curvature, which we normalize to be $m(m-1)$, we consider the Riemannian product with the $n$-dimensional Euclidean space: $(M^m \times \mathbb{R}^n , g+ g_E )$. And we study, as in [2], the solution of the Yamabe equation which depends only on the Euclidean factor. We show that there exists a constant $\lambda (m,n)$ such that this solution is stable if and only if $\lambda_1 \geq \lambda (m,n)$, where $\lambda_1$ is the first positive eigenvalue of $-\Delta_g$. We compute $\lambda (m,n)$ numerically for small values of $m,n$ showing in these cases that the Euclidean minimizer is stable in the case $M=S^m$ with the metric of constant curvature. This implies that the same is true for any closed manifold with a Yamabe metric.

Article information

J. Math. Soc. Japan Volume 68, Number 4 (2016), 1473-1486.

First available in Project Euclid: 24 October 2016

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Mathematical Reviews number (MathSciNet)

Zentralblatt MATH identifier

Primary: 53C21: Methods of Riemannian geometry, including PDE methods; curvature restrictions [See also 58J60]
Secondary: 53C20: Global Riemannian geometry, including pinching [See also 31C12, 58B20]

Yamabe equation Non-compact manifolds


PETEAN, Jimmy; RUIZ, Juan Miguel. Stable solutions of the Yamabe equation on non-compact manifolds. J. Math. Soc. Japan 68 (2016), no. 4, 1473--1486. doi:10.2969/jmsj/06841473.

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