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    ARSCOM
    2008
    153views more  ARSCOM 2008»
    Counting polyominoes with minimum perimeter
    14 years 10 months ago
    Counting polyominoes with minimum perimeter
    Download  www.mathe2.uni-bayreuth.de
    Sascha Kurz
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    COMBINATORICS
    2006
    122views more  COMBINATORICS 2006»
    Adding Layers to Bumped-Body Polyforms with Minimum Perimeter Preserves Minimum Perimeter
    14 years 10 months ago
    Adding Layers to Bumped-Body Polyforms with Minimum Perimeter Preserves Minimum Perimeter
    Download  www.combinatorics.org
    In two dimensions, a polyform is a finite set of edge-connected cells on a square, triangular, or hexagonal grid. A layer is the set of grid cells that are vertex-adjacent to the ...
    Winston C. Yang
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    DM
    1998
    66views more  DM 1998»
    Steep polyominoes, q-Motzkin numbers and q-Bessel functions
    14 years 9 months ago
    Steep polyominoes, q-Motzkin numbers and q-Bessel functions
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    We introduce three deÿnitions of q-analogs of Motzkin numbers and illustrate some combinatorial interpretations of these q-numbers. We relate the ÿrst class of q-numbers to the ...
    Elena Barcucci, Alberto Del Lungo, Jean-Marc Fedou...
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    IANDC
    2008
    76views more  IANDC 2008»
    The number of convex permutominoes
    14 years 10 months ago
    The number of convex permutominoes
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    Permutominoes are polyominoes defined by suitable pairs of permutations. In this paper we provide a formula to count the number of convex permutominoes of given perimeter. To this ...
    Paolo Boldi, Violetta Lonati, Roberto Radicioni, M...
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