Pyuyi Chufeng Huang

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math.CO2026

Cycle-Decorated Ribbon Complexes: Cut Coproducts and Alternating-Fence Positivity

Pyuyi Chufeng Huang

Let $α ⊨ n$ . We define a two-variable specialization $Z_{α} (t, q)$ of the ribbon basis of noncommutative symmetric functions from cycle enumerators of an ordinary permutation and…

math.CO2026

Bernstein Transfers and Greedy Records for Fence and Circular-Fence Order Polynomials

Pyuyi Chufeng Huang

Let $P_\eps$ be the fence poset associated with an orientation $\eps\in\{+,-\}^{n-1}$ of a path. We define a greedy right-to-left record statistic $\rec_\eps$ on $S_n$ and…