assume I have a group $G$ over a field of char 0 and $H$ a closed subgroup. When is it true that the group $N(H)/H$ is representable? If $G$ has nice properties, like to be reductive or unipotent is it true that $N(H)/H$ is representable and that it has the same properties?
quotient group scheme
5
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algebraic-geometry
algebraic-groups