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We consider domino tilings of $3$-dimensional cubiculated regions. A three-dimensional domino is a 2x2x1 rectangular cuboid. We are particularly interested in regions of the form $R_N = D \times [0,N]$ where $D$ is a fixed quadriculated…

Combinatorics · Mathematics 2021-02-16 Nicolau C. Saldanha

We consider domino tilings of three-dimensional cubiculated regions. A flip is a local move: two neighboring parallel dominoes are removed and placed back in a different position. The twist is an integer associated to each tiling, which is…

Combinatorics · Mathematics 2022-01-14 Nicolau C. Saldanha

Given a tiling of a 2D grid with several types of tiles, we can count for every row and column how many tiles of each type it intersects. These numbers are called the_projections_. We are interested in the problem of reconstructing a tiling…

Computational Complexity · Computer Science 2009-09-25 Marek Chrobak , Peter Couperus , Christoph Durr , Gerhard Woeginger

We consider the subgroup of the abelian sandpile group of the grid graph consisting of configurations of sand that are symmetric with respect to central vertical and horizontal axes. We show that the size of this group is (i) the number of…

Combinatorics · Mathematics 2014-06-03 Laura Florescu , Daniela Morar , David Perkinson , Nick Salter , Tianyuan Xu

Several articles deal with tilings with squares and dominoes of the well-known regular square mosaic in Euclidean plane, but not any with the hyperbolic regular square mosaics. In this article, we examine the tiling problem with colored…

Combinatorics · Mathematics 2021-04-01 Takao Komatsu , László Németh , László Szalay

We consider tromino tilings of $m\times n$ domino-deficient rectangles, where $3|(mn-2)$ and $m,n\geq0$, and characterize all cases of domino removal that admit such tilings, thereby settling the open problem posed by J. M. Ash and S.…

Discrete Mathematics · Computer Science 2007-08-13 Mridul Aanjaneya

A \textit{domino} is a $2\times 1\times 1$ parallelepiped formed by the union of two unit cubes and a \textit{slab} is a $2\times 2\times 1$ parallelepiped formed by the union of four unit cubes. We are interested in tiling regions formed…

Combinatorics · Mathematics 2025-03-11 George L. D. Alencar , Nicolau C. Saldanha , Arthur M. M. Vieira

In a region R consisting of unit squares, a (domino) tiling is a collection of dominoes (the union of two adjacent squares) which pave fully the region. The flip graph of R is defined on the set of all tilings of R where two tilings are…

Combinatorics · Mathematics 2025-01-16 Qianqian Liu , Yaxian Zhang , Heping Zhang

We study the diagonals of two-dimensional tilings generated by direct product substitutions. The properties of these diagonals are primarily determined by the eigenvalues of the substitution matrix, but also the order of the letters in the…

Dynamical Systems · Mathematics 2013-02-18 Michel Dekking

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

The modular design of planar phased arrays arranged on orthogonal polygon-shaped apertures is addressed and a new method is proposed to synthesize domino-tiled arrays fitting multiple, generally conflicting, requirements. Starting from an…

Applied Physics · Physics 2022-05-18 Paolo Rocca , Nicola Anselmi , Alessandro Polo , Andrea Massa

Inspired by the modelization of 2D materials systems, we characterize arrangements of identical nonflat squares in 3D. We prove that the fine geometry of such arrangements is completely characterized in terms of patterns of mutual…

Mathematical Physics · Physics 2021-08-05 Manuel Friedrich , Manuel Seitz , Ulisse Stefanelli

As a continuation to our previous work [9, 10], we consider the domino tiling problem with impurities. (1) if we have more than two impurities on the boundary, we can compute the number of corresponding perfect matchings by using the…

Combinatorics · Mathematics 2015-06-12 Fumihiko Nakano , Taizo Sadahiro

In this paper we consider domino tilings of bounded regions in dimension $n \geq 4$. We define the twist of such a tiling, an elements of ${\mathbb{Z}}/(2)$, and prove it is invariant under flips, a simple local move in the space of…

Combinatorics · Mathematics 2021-10-22 Caroline Klivans , Nicolau C. Saldanha

Aperiodic tiling --- a form of complex global geometric structure arising through locally checkable, constant-time matching rules --- has long been closely tied to a wide range of physical, information-theoretic, and foundational…

Combinatorics · Mathematics 2017-09-21 Chaim Goodman-Strauss

In this paper, we continue the study of domino-tilings of Aztec diamonds. In particular, we look at certain ways of placing ``barriers'' in the Aztec diamond, with the constraint that no domino may cross a barrier. Remarkably, the number of…

Combinatorics · Mathematics 2007-05-23 James Propp , Richard Stanley

Several articles deal with tilings with squares and dominoes on 2-dimensional boards, but only a few on boards in 3-dimensional space. We examine a tiling problem with colored cubes and bricks of $(2\times2\times n)$-board in three…

Combinatorics · Mathematics 2021-04-01 László Németh

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 investigate tilings of cubiculated regions with two simply connected floors by 2 x 1 x 1 bricks. More precisely, we study the flip connected component for such tilings, and provide an algebraic invariant that "almost" characterizes the…

Combinatorics · Mathematics 2015-04-07 Pedro H. Milet , Nicolau C. Saldanha

We count tilings of the $n \times m$ rectangular grid, cylinder, and torus with arbitrary tile sets up to arbitrary symmetries of the square and rectangle, along with cyclic shifting of rows and columns. This provides a unifying framework…

Combinatorics · Mathematics 2025-09-30 Peter Kagey , William Keehn