Fengchang Li

activity

20242026

collaborators

3 papers

math.QA2026

Universal $R$ -matrix of double parameter quantum affine algebra $U_{q, Q} (s l_{2}^)$

Fengchang Li, Masatake Maruyama, Hiroyuki Yamane

We give the explicit formula of the universal $R$ -matrix of a double parameter (or two-parameter, or multi-parameter) quantum affine algebra of type $A_{1}^{(1)}$ . For $N$ …

math.GR2025

Subracks and second homology of the conjugacy classes of finite projective special linear groups of degree two

Istvan Heckenberger, Fengchang Li

We describe the subracks of the conjugacy classes of $PSL (2, q)$ based on Dickson's theorem on subgroups of $PSL (2, q)$ . All minimal non-abelian subracks of $\mathr…

math.QA2024

On the structure of quantum affine superalgebra $U_{v} (A (0, 2)^{(4)})$

Fengchang Li

We research $U_{v} (A (0, 2)^{(4)})^{+}$ defined by quantum Serre relations, when $v$ is not a root of unity. We prove that $U_{v} (A (0, 2)^{(4)})^{+}$ is isomorphic to a Nichols algebr…

Universal R-matrix of double parameter quantum affine algebra Uq,Q​(sl2​^​)

Subracks and second homology of the conjugacy classes of finite projective special linear groups of degree two

On the structure of quantum affine superalgebra Uv​(A(0,2)(4))

Universal $R$ -matrix of double parameter quantum affine algebra $U_{q, Q} (s l_{2}^)$

On the structure of quantum affine superalgebra $U_{v} (A (0, 2)^{(4)})$