A universal Clebsch-Gordan filtration for ${\mathrm{GL}}_{2,A}$

Helge Öystein Maakestad

The aim of the paper is to study the group schemes $G:={\mathrm{SL}}_{2,A},{\mathrm{GL}}_{2,A}$ and universal Clebsch-Gordan filtrations. Here $A$ is a field or any commu…