Geodesic
The Moduli Space of Sheaves and a Generalization of MacMahon's Formula
Funkcionalʹnyj analiz i ego priloženiâ, Tome 47 (2013) no. 2, pp. 18-26

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M. Vuletic has recently found a two-parameter generalization of MacMahon's formula. In this paper we show that the coefficients in her formula are the Betti numbers of certain subvarieties in the moduli space of sheaves on the projective plane.
Mots-clés : moduli space, plane partition
Keywords: quiver variety. 
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A. Yu. Buryak. The Moduli Space of Sheaves and a Generalization of MacMahon's Formula. Funkcionalʹnyj analiz i ego priloženiâ, Tome 47 (2013) no. 2, pp. 18-26. http://geodesic.mathdoc.fr/item/FAA_2013_47_2_a2/