The area conjecture for growth forms of deformed hat tilings

For positive b1b\neq 1, let Tile(1,b)Tile(1,b) be the deformed hat tile, and let a tiling by these tiles have growth form with area areagrowth formarea_{growth\ form}. The tile has area areaTile(1,b)area_{Tile(1,b)}. Area conjecture for deformed hat tilings. The growth forms resulting from Tile(1,b)Tile(1,b) satisfy

areagrowth form=23areaTile(1,b).area_{growth\ form}=2\sqrt{3}\,area_{Tile(1,b)}.

This is proposed on the basis of computer experiments and the close relationship between hat tiling and the hexagonal lattice. The corresponding tilings are stated to be aperiodic and combinatorially equivalent, and their growth forms are known in the paper to be regular hexagons, but the asserted area relation is not proved there.

Sources & referencesView supporting material

Primary source

Peter Hilgers and Anton Shutov, “Growth Forms of Tilings”, arXiv:2508.19928 (2025).

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