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arXiv 0902.2047math.APmath.DG
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Allen-Cahn方程的整体解与$\R^3$中有限全曲率的完全嵌入极小曲面

Entire Solutions of the Allen-Cahn equation and Complete Embedded Minimal Surfaces of Finite Total Curvature in $\R^3$

Manuel del Pino, Mike Kowalczyk, Juncheng Wei

摘要:

本文研究了Allen-Cahn方程$Δu + f(u) = 0 \hbox{in} \R^3 $的完备的、嵌入的、具有有限全曲率的极小曲面$M$和具有有限Morse指标的有界的、整解.这里的$f=-W'$与$W$是对称的,例如$W(u) =\frac 14 (1-u^2)^2$。我们假设$M$有$m\ge 2$端点,并且$M$是非退化的,在这个意义上,它的有界雅可比场都起源于刚性运动(这是已知的,例如对于任何属的悬链面和Costa-Hoffman-Meeks曲面)。我们证明了对于任何小的$α>0$,Allen-Cahn方程有一个家庭的有界解依赖于$m-1$参数不同的刚性运动,其水平集是嵌入表面躺在靠近爆破表面$M_α:= α^{-1} M$,与端可能从$M_\A$离散。我们证明了这些解是$L^\infty$ -{ \em non-degenerate}直到刚体运动,并发现它们的Morse指数与极小曲面的指数一致.我们的建设建议平行的De Giorgi猜想的一般有界解的有限Morse指数。

英文摘要:

We consider minimal surfaces $M$ which are complete, embedded and have finite total curvature in $\R^3$, and bounded, entire solutions with finite Morse index of the Allen-Cahn equation $Δu + f(u) = 0 \hbox{in} \R^3 $. Here $f=-W'$ with $W$ bistable and balanced, for instance $W(u) =\frac 14 (1-u^2)^2$. We assume that $M$ has $m\ge 2$ ends, and additionally that $M$ is non-degenerate, in the sense that its bounded Jacobi fields are all originated from rigid motions (this is known for instance for a Catenoid and for the Costa-Hoffman-Meeks surface of any genus). We prove that for any small $α>0$, the Allen-Cahn equation has a family of bounded solutions depending on $m-1$ parameters distinct from rigid motions, whose level sets are embedded surfaces lying close to the blown-up surface $M_α:= α^{-1} M$, with ends possibly diverging logarithmically from $M_\A$. We prove that these solutions are $L^\infty$-{\em non-degenerate} up to rigid motions, and find that their Morse index coincides with the index of the minimal surface. Our construction suggests parallels of De Giorgi conjecture for general bounded solutions of finite Morse index.

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