Free Products of Exact Groups

  title={Free Products of Exact Groups},
  author={Ken Dykema},
  journal={arXiv: Operator Algebras},
  • K. Dykema
  • Published 8 November 1999
  • Mathematics
  • arXiv: Operator Algebras
It has recently been proved that the class of unital exact C*-algebras is closed under taking reduced amalgamated free products. Here the proof is presented of a special case: that the class of exact discrete groups is closed under taking free products (with amalgamation over the identity element). The proof of this special case is considerably simpler than in full generality. 
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