On integral images of Curtis homomorphisms for ${\mathrm{GL}}_n$ and ${\mathrm{U}}_n$

Tzu-Jan Li

For $G={\mathrm{GL}}_n$ or ${\mathrm{U}}_n$ defined over a finite field of characteristic $p$, we refine a result of Bonnafé and Kessar on the saturatedness of the Curtis homomorphis…