Regularizing a singular special Lagrangian variety

Details Regularizing a singular special Lagrangian variety Regularizing a singular special Lagrangian variety

2001-10-04

arxiv.org/abs/math/0110053v2

Mathematics

Differential Geometry

Final version; will appear in Communications of Analysis and Geometry. Includes more comprehensive introduction and acknowledg

Scientific paper

Suppose $M_{1}$ and $M_{2}$ are two special Lagrangian submanifolds of $\Rtn$ with boundary that intersect transversally at one point $p$. The set $M_{1} \cup M_{2}$ is a singular special Lagrangian variety with an isolated singularity at the point of intersection. Suppose further that the tangent planes at the intersection satisfy an angle condition (which always holds in dimension $n=3$). Then, $M_{1} \cup M_{2}$ is regularizable; in other words, there exists a family of smooth, minimal Lagrangian submanifolds $M_{\alpha}$ with boundary that converges to $M_{1} \cup M_{2}$ in a suitable topology. This result is obtained by first gluing a smooth neck into a neighbourhood of $M_{1} \cap M_{2}$ and then by perturbing this approximate solution until it becomes minimal and Lagrangian.

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