Yuping Yang

activity

20142026

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math.CO2025

Combinatorial equivalence of separable elements in types $A$ and $B$

Yong Liao, Yuping Yang, Houyi Yu

We study the combinatorial equivalence of separable elements in types $A$ and $B$ . A bijection is constructed from the set of separable permutations in the symmetric group $S_{n+1}…

math.QA2025

On the classification of finite GK-dimensional pre-Nichols algebras and quasi-quantum groups

Yuping Yang

We prove that every pre-Nichols algebra of a nondiagonal object in the twisted Yetter-Drinfeld category ${_{\k G}^{\k G} {\mathcal{YD}^Φ}}$ has infinite Gelfand-Kirillov dimension,…

Combinatorial equivalence of separable elements in types A and B

On the classification of finite GK-dimensional pre-Nichols algebras and quasi-quantum groups

Combinatorial equivalence of separable elements in types $A$ and $B$