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arXiv · 1910.10342

Topology and Geometry of Crystallized Polyominoes

Greg Malen·Érika Roldán
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Abstract

We give a complete solution to the extremal topological combinatorial problem of finding the minimum number of tiles needed to construct a polyomino with $h$ holes. We denote this number by $g(h)$ and say that a polyomino is crystallized if it has $h$ holes and $g(h)$ tiles. We analyze structural properties of crystallized polyominoes and characterize their efficiency by a topological isoperimetric inequality that relates minimum perimeter, the area of the holes, and the structure of the dual graph of a polyomino. We also develop a new dynamical method of creating sequences of polyominoes which is invariant with respect to crystallization and efficient structure. Using this technique, we prove that crystallized polyominoes with $h_l=(2^{2l}-1)/3$ holes are unique.

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Greg Malen, Érika Roldán. 2019-10-23. Topology and Geometry of Crystallized Polyominoes. https://arxiv.org/abs/1910.10342

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