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 thai no domino may cross a barrier. Remarkably, the number of constrained tilings is independent of the placement of the barriers. We do not know of a simple combinatorial explanation of this Fact; our proof uses the Jacobi-Trudi identity. (C) 1999 Academic Press.
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St.Petersburg National Research University of Information Technologies, Mechanics, and Optics, St. PetersburgSt.Petersburg National Research University of Information Technologies, Mechanics, and Optics, St. Petersburg
Aksenov V.
Kokhas K.
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St.Petersburg State University, St. PetersburgSt.Petersburg National Research University of Information Technologies, Mechanics, and Optics, St. Petersburg
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College of Arts and Sciences, University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo,153-8914, JapanCollege of Arts and Sciences, University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo,153-8914, Japan
Kamio, Yuhi
Koizumi, Junnosuke
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Graduate School of Mathematical Sciences, University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo,153-8914, JapanCollege of Arts and Sciences, University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo,153-8914, Japan
Koizumi, Junnosuke
Nakazawa, Toshihiko
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KADOKAWA DWANGO Educational Institute, Kabuki-za Tower 14F, 4-12-15 Ginza, Chuo-ku, Tokyo,104-0061, JapanCollege of Arts and Sciences, University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo,153-8914, Japan