On central extensions of preprojective algebras
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On central extensions of preprojective algebras

  • Author(s): Etingof, Pavel
  • Latour, Frederic
  • Rains, Eric
  • et al.

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We determine the structure of the center and the trace space of the centrally extended preprojective algebra of an ADE quiver, introduced by the first and the third authors in math/0503393. It turns out that this structure has a mysterious relationship to the structure of the maximal nilpotent subalgebra of the corresponding simple Lie algebra.

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