Séminaire Combinatoire et Théorie des Nombres ICJ

The domino tilings of Aztec rectangles with holes and the Gauss hypergeometric series

par Masao Ishikawa (Université d'Okayama)

Europe/Paris
Salle Fokko du Cloux (ICJ)

Salle Fokko du Cloux

ICJ

1er étage bâtiment Braconnier, Université Claude Bernard Lyon 1 - La Doua
Description
We study the number of domino tilings of an Aztec rectangle with even number of consecutive holes in a line and we obtain a formula which express the number of such domino tilings by a product of a power of 2, a nice product and a polynomial of the coordinates of the holes. We will find a formula which expresses this polynomial as a determinant of terminating Gauss hypergeometric series. First we use the Lindstrom-Gessel-Viennot theorem to enumerate the domino tilings of an Aztec rectangle with consecutive holes and obtain a determinant whose entries are generalized large Schroder numbers.