I am reading A. L. Oniscik's paper Decompositions of Reductive Lie Groups, and the author cited a proposition that a complex reductive Lie group $G=ZS$ is locally isomorphic to the reductive algebraic group $\widetilde G= \mathbb C^{m}\times S$. I want to have a reference about this proposition. Any reference will be helpful. Thanks.
2026-03-29 13:47:06.1774792026
complex reductive Lie group
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