Remarks on HNN extensions in operator algebras

Ueda Yoshimichi

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


It is shown that any HNN extension is precisely a compression by a projection of a certain amalgamated free product in the framework of operator algebras. As its applications several questions for von Neumann algebras or C*-algebras arising as HNN extensions are considered.

Original languageEnglish
Pages (from-to)705-725
Number of pages21
JournalIllinois Journal of Mathematics
Issue number3
Publication statusPublished - 2008

All Science Journal Classification (ASJC) codes

  • Mathematics(all)


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