Normal ordering coefficients in the (p,q)-deformed generalized Weyl algebra are identified with new (p,q)-deformed s-rook numbers on Ferrers boards, yielding a rook interpretation of the associated (p,q)-Stirling numbers.
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Normal ordering in the $(p,q)$-deformed generalized Weyl algebra. II: Interpretation in terms of rook placements
Normal ordering coefficients in the (p,q)-deformed generalized Weyl algebra are identified with new (p,q)-deformed s-rook numbers on Ferrers boards, yielding a rook interpretation of the associated (p,q)-Stirling numbers.