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arxiv: 1803.01590 · v4 · pith:CSO52BYZnew · submitted 2018-03-05 · 🧮 math.CO

Enumeration on row-increasing tableaux of shape 2 times n

classification 🧮 math.CO
keywords tableauxindexrow-increasingshapetimesmajornumbersrefined
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Recently O. Pechenik studied the cyclic sieving of increasing tableaux of shape $2\times n$, and obtained a polynomial on the major index of these tableaux, which is a $q$-analogue of refined small Schr\"{o}der numbers. We define row-increasing tableaux and study the major index and amajor index of row-increasing tableaux of shape $2 \times n$. The resulting polynomials are both $q$-analogues of refined large Schr\"{o}der numbers. For both results we give bijective proofs.

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