3 papers
math.GR2021
Normal -complements and irreducible character codegrees
Jiakuan Lu, Yu Li, Boru Zhang
Let be a finite group and , and let Irr be the set of all irreducible complex characters of . Let , we write ${\rm cod}(χ)=|G:{\rm ker} χ|…
math.RT2020
Abelian Ideals and the Variety of Lagrangian Subalgebras
Sam Evens, Yu Li
For a semisimple algebraic group of adjoint type with Lie algebra over the complex numbers, we establish a bijection between the set of closed orbits of the group…
math.QA2019
Quantum Boson Algebra and Poisson Geometry of the Flag Variety
Yu Li
In his work on crystal bases \cite{Kas}, Kashiwara introduced a certain degeneration of the quantized universal enveloping algebra of a semi-simple Lie algebra , which…