Chengyu Du

collaborators

2 papers

math.RT2025

Non-decreasable K-types are unitarily small

Chao-Ping Dong, Chengyu Du, Haojun Xu

Let $G$ be a connected simple non-compact real reductive Lie group with a maximal compact subgroup $K$ . This note aims to show that any non-decreasable $K$ -type (in the sense of th…

math.RT2025

On the nonvanishing condition for $A_{q} (I^»)$ of $U (p, q)$ in the mediocre range

Chengyu Du

The modules $A_{q} (I^»)$ of $U (p, q)$ can be parameterized by their annihilators and asymptotic supports, both of which can be identified using Young tableaux. Trapa develop…

Non-decreasable K-types are unitarily small

On the nonvanishing condition for Aq​(I^») of U(p,q) in the mediocre range

On the nonvanishing condition for $A_{q} (I^»)$ of $U (p, q)$ in the mediocre range