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Paper   IPM / M / 455
School of Mathematics
  Title:   On the relation of extended affine Weyl groups and indefinite Weyl groups
  Author(s):  S. Azam
  Status:   Published
  Journal: J. Algebra
  Vol.:  222
  Year:  1999
  Pages:   174-189
  Supported by:  IPM
Extended affine Weyl groups are the Weyl groups of root systems of a new class of Lie algebras called extended affine Lie algebras. In this paper we show that a (reduced) extended affine Weyl group is the homomorphic image of some indefinite Kac-Moody Weyl group where the homomorphism and its kernel are given explicitly.

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