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Published online by Cambridge University Press: 14 July 2008
We consider a least-energy solution to a nonlinear elliptic equation arising in a nonlinear optics model. The equation is linear in a given bounded domain $D$ and nonlinear in $\mathbb{R}^N\setminus D$. We consider a singular limiting problem to obtain a relation between a location of a spiky solution and a geometry of $D$.