Inverse problem of the limit shape for convex lattice polygonal lines

Details Inverse problem of the limit shape for convex lattice polygonal lines Inverse problem of the limit shape for convex lattice polygonal lines

2011-10-30

arxiv.org/abs/1110.6636v1

Mathematics

Probability

Scientific paper

It is known that random convex polygonal lines on $\mathbb{Z}_+^2$ (with the endpoints fixed at $0=(0,0)$ and $n=(n_1,n_2)\to\infty$) have a limit shape with respect to the uniform probability measure, identified as the parabola arc $\sqrt{c\myp(1-x_1)}+\sqrt{x_2}=\sqrt{c}$, where $n_2/n_1\to c$. The present paper is concerned with the inverse problem of the limit shape. We show that for any strictly convex, $C^3$-smooth arc $\gamma\subset\mathbb{R}_+^2$ starting at the origin, there is a probability measure $P_n^\gamma$ on convex polygonal lines, under which the curve $\gamma$ is their limit shape.

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