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About: Chevalley–Shephard–Todd theorem     Goto   Sponge   NotDistinct   Permalink

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Type: anatomical structureyago:WikicatTheoremsInAbstractAlgebrayago:Abstraction100002137yago:Communication100033020yago:Group100031264yago:Message106598915yago:Proposition106750804yago:Statement106722453yago:Theorem106752293yago:WikicatFiniteGroups New Facet based on Instances of this Class

In mathematics, the Chevalley–Shephard–Todd theorem in invariant theory of finite groups states that the ring of invariants of a finite group acting on a complex vector space is a polynomial ring if and only if the group is generated by pseudoreflections. In the case of subgroups of the complex general linear group the theorem was first proved by G. C. Shephard and J. A. Todd who gave a case-by-case proof. Claude Chevalley soon afterwards gave a uniform proof. It has been extended to finite linear groups over an arbitrary field in the non-modular case by Jean-Pierre Serre.