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Results tagged with rt.representation-theory
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user 43107
Linear representations of algebras and groups, Lie theory, associative algebras, multilinear algebra.
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Accepted
Why is the semisimple quotient of a reductive group with semisimple rank 1 equal to PGL2?
Your question comes down to knowing that if $G$ (your $G/Z(G)$) is a smooth connected affine extension of ${\rm{PGL}}_2$ by a finite group then the quotient map $q:G \rightarrow {\rm{PGL}}_2$ is eithe …
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