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A recent conjecture of Di Francesco states that the number of domino tilings of a certain family of regions on the square lattice is given by a product formula reminiscent of the one giving the number of alternating sign matrices. These…

Combinatorics · Mathematics 2021-04-20 Mihai Ciucu

Di Francesco introduced Aztec triangles as combinatorial objects for which their domino tilings are equinumerous with certain sets of configurations of the twenty-vertex model that are the main focus of his article. We generalize Di…

Combinatorics · Mathematics 2023-05-05 Sylvie Corteel , Frederick Huang , Christian Krattenthaler

Di Francesco conjectured in 2021 that the number of domino tilings of a certain family of regions -- called Aztec triangles -- on the square lattice is given by a product formula reminiscent of the one giving the number of alternating sign…

Combinatorics · Mathematics 2025-08-07 Seok Hyun Byun , Mihai Ciucu

We investigate the connection between lozenge tilings and domino tilings by introducing a new family of regions obtained by attaching two different Aztec rectangles. We prove a simple product formula for the generating functions of the…

Combinatorics · Mathematics 2015-09-30 Tri Lai

We introduce a family of planar regions, called Aztec diamonds, and study the ways in which these regions can be tiled by dominoes. Our main result is a generating function that not only gives the number of domino tilings of the Aztec…

Combinatorics · Mathematics 2008-02-03 Noam Elkies , Greg Kuperberg , Michael Larsen , James Propp

We consider the problem of counting and classifying domino tilings of a quadriculated torus. The counting problem for rectangles was studied by Kasteleyn and we use many of his ideas. Domino tilings of planar regions can be represented by…

Combinatorics · Mathematics 2016-01-26 Fillipo Impellizieri

The expanded Aztec diamond is a generalized version of the Aztec diamond, with an arbitrary number of long columns and long rows in the middle. In this paper, we count the number of domino tilings of the expanded Aztec diamond. The exact…

Combinatorics · Mathematics 2017-11-02 Seungsang Oh

We show that the number of configurations of the 20 Vertex model on certain domains with domain wall type boundary conditions is equal to the number of domino tilings of Aztec-like triangles, proving a conjecture from [P. Di Francesco and…

Combinatorics · Mathematics 2021-02-08 Philippe Di Francesco

Fairly shortly after the publication of the Aztec diamond theorem of Elkies, Kuperberg, Larsen and Propp in 1992, interest arose in finding the number of domino tilings of an Aztec diamond with an ``Aztec window,'' i.e.\ a hole in the shape…

Combinatorics · Mathematics 2025-08-11 Mihai Ciucu

We consider a generating function of the domino tilings of an Aztec rectangle with several boundary unit squares removed. Our generating function involves two statistics: the rank of the tiling and half number of vertical dominoes as in the…

Combinatorics · Mathematics 2015-04-02 Tri Lai

Helfgott and Gessel gave the number of domino tilings of an Aztec Rectangle with defects of size one on the boundary of one side. In this paper we extend this to the case of domino tilings of an Aztec Rectangle with defects on all boundary…

Combinatorics · Mathematics 2017-04-17 Manjil P. Saikia

In this article we study domino tilings of a family of finite regions called Aztec diamonds. Every such tiling determines a partition of the Aztec diamond into five sub-regions; in the four outer sub-regions, every tile lines up with nearby…

Combinatorics · Mathematics 2026-04-08 William Jockusch , James Propp , Peter Shor

We consider tilings of quadriculated regions by dominoes and of triangulated regions by lozenges. We present an overview of results concerning tileability, enumeration and the structure of the space of tilings.

Combinatorics · Mathematics 2007-05-23 Nicolau C. Saldanha , Carlos Tomei

In their unpublished work, Jockusch and Propp showed that a 2-enumeration of antisymmetric monotone triangles is given by a simple product formula. On the other hand, the author proved that the same formula counts the domino tilings of the…

Combinatorics · Mathematics 2015-07-21 Tri Lai

We use the subgraph replacement method to investigate new properties of the tilings of regions on the square lattice with diagonals drawn in. In particular, we show that the centrally symmetric tilings of a generalization of the Aztec…

Combinatorics · Mathematics 2019-05-20 Tri Lai

We prove an asymptotic formula for the probability that, if one chooses a domino tiling of a large Aztec diamond at random according to the uniform distribution on such tilings, the tiling will contain a domino covering a given pair of…

Combinatorics · Mathematics 2012-03-15 Henry Cohn , Noam Elkies , James Propp

We get four quartered Aztec diamonds by dividing an Aztec diamond region by two zigzag cuts passing its center. W. Jockusch and J. Propp (in an unpublished work) found that the number of tilings of quartered Aztec diamonds is given by…

Combinatorics · Mathematics 2013-09-27 Tri Lai

Aztec dragons are lattice regions first introduced by James Propp, which have the number of tilings given by a power of $2$. This family of regions has been investigated further by a number of authors. In this paper, we consider a…

Combinatorics · Mathematics 2015-10-30 Tri Lai

In this paper, we consider domino tilings of regions of the form $\mathcal{D} \times [0,n]$, where $\mathcal{D}$ is a simply connected planar region and $n \in \mathbb{N}$. It turns out that, in nontrivial examples, the set of such tilings…

Combinatorics · Mathematics 2015-10-27 Pedro H. Milet , Nicolau C. Saldanha

Motivated in part by Propp's intruded Aztec diamond regions, we consider hexagonal regions out of which two horizontal chains of triangular holes (called ferns) are removed, so that the chains are at the same height, and are attached to the…

Combinatorics · Mathematics 2019-05-20 Mihai Ciucu , Tri Lai
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