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

    • General Mathematics


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