Abstract
We study lozenge tilings of a domain with partially free boundary. In particular, we consider a trapezoidal domain (half-hexagon), s.t. the horizontal lozenges on the long side can intersect it anywhere to protrude halfway across. We show that the positions of the horizontal lozenges near the opposite flat vertical boundary have the same joint distribution as the eigenvalues from a Gaussian Unitary Ensemble (the GUE-corners/minors process). We also prove the existence of a limit shape of the height function, which is also a vertically symmetric plane partition. Both behaviors are shown to coincide with those of the corresponding doubled fixed boundary hexagonal domain. We also consider domains where the different sides converge to \({\infty}\) at different rates and recover again the GUE-corners process near the boundary.
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Panova, G. Lozenge Tilings with Free Boundaries. Lett Math Phys 105, 1551–1586 (2015). https://doi.org/10.1007/s11005-015-0794-6
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DOI: https://doi.org/10.1007/s11005-015-0794-6