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Twisting of affine algebraic groups, III
Let $G$ be an affine algebraic group over $\C$ and let $J$ be a Hopf $2$-cocycle for $\Os(G)$. We prove that one-sided cocycle twisting preserves Gelfand--Kirillov dimension and that $\Os(G)_J$ is simple if and only if $J$ is minimal. If $H$ is the support of $J$, we identify the primitive and maxim
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