Rigidity for the Hopf Algebra of Quasisymmetric Functions. - Wanwan Jia; Zhengpan Wang; Houyi Yu (Electron. J. Comb., 2019)

On the cancellation-free antipode formula for the Malvenuto-Reutenauer Hopf Algebra. - Houyi Yu; Da Xu (Eur. J. Comb., 2023)

The Coincidence of the Bruhat Order and the Secondary Bruhat Order on A(n,k). - Tao Zhang; Houyi Yu (Order, 2023)

The weak order on the hyperoctahedral group and the monomial basis for the Hopf algebra of signed permutations. - Houyi Yu (Discret. Math., 2024)

Sign-twisted generating functions of the odd length for Weyl groups of type D. - Haihang Gu; Houyi Yu (Discret. Math., 2025)

Separable elements and splittings in Weyl groups of type B. - Ming Liu; Houyi Yu (J. Comb. Theory, Ser. A, 2025)