Asymptotic behavior of solutions to the ${\sigma }_k$-Yamabe equation near isolated singularities

Abstract

${\sigma }_k$-Yamabe equations are conformally invariant equations generalizing the classical Yamabe equation. In an earlier work YanYan Li proved that an admissible solution with an isolated singularity at $0\in {\mathbb{R}}^n$ to the ${\sigma }_k$-Yamabe equation is asymptotically radially symmetric. In this work we prove that an admissible solution with an isolated singularity at $0\in {\mathbb{R}}^n$ to the ${\sigma }_k$-Yamabe equation is asymptotic to a radial solution to the same equation on ${\mathbb{R}}^n\setminus \{0\}$. These results generalize earlier pioneering work in this direction on the classical Yamabe equation by Caffarelli, Gidas, and Spruck. In extending the work of Caffarelli et al, we formulate and prove a general asymptotic approximation result for solutions to certain ODEs which include the case for scalar curvature and ${\sigma }_k$ curvature cases. An alternative proof is also provided using analysis of the linearized operators at the radial solutions, along the lines of approach in a work by Korevaar, Mazzeo, Pacard, and Schoen.

55 pages

References in corpus (2)

• On some conformally invariant fully nonlinear equations, Part II: Liouville, Harnack and Yamabe
• Boundary trace of positive solutions of semilinear elliptic equations in Lipschitz domains

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