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Simple stably projectionless C*-algebras

Research Project

Project/Area Number 16K17614
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Basic analysis
Research InstitutionOsaka Kyoiku University

Principal Investigator

Nawata Norio  大阪教育大学, 教育学部, 講師 (90614040)

Project Period (FY) 2016-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Keywords作用素環 / C*-環 / stably projectionless / 中心列C*-環 / Rohlin性 / 群作用 / Stably projectionless / Stably projetionless / トレイススケーリング / 自己同型 / ペアリング / Pairing / Trace scaling
Outline of Final Research Achievements

In this research, I studied simple stably projectionless C*-algebras, which are noncommutative and infinite-dimensional mathematical objects. In particular, I studied symmetires of W and classified some integer actions and finite group actions on W up to conjugacy and outer conjugacy. Also, I showed that central sequence C*-algebra of W has some interesting properties.

Academic Significance and Societal Importance of the Research Achievements

C*-環は作用素環論の研究対象であり, 非可換かつ無限次元な数学的対象である. 非可換性や無限次元といった性質を数学的に解明することが作用素環論の主題である. 作用素環論では中心的な課題の一つとして, 作用素環への群作用の分類が研究されている. 本研究で得られた成果は, 単純 stably projectionless という単位元も射影も持たないクラスに属するC*-環への群作用の分類で最初に得られた肯定的な結果である.

Report

(5 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (12 results)

All 2020 2019 2018 2017 2016 Other

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (9 results) (of which Int'l Joint Research: 2 results,  Invited: 2 results) Remarks (1 results)

  • [Journal Article] Rohlin Actions of Finite Groups on the Razak-Jacelon Algebra2020

    • Author(s)
      Nawata Norio
    • Journal Title

      International Mathematics Research Notices

      Volume: - Issue: 4 Pages: 2991-3020

    • DOI

      10.1093/imrn/rnaa039

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Trace scaling automorphisms of the stabilized Razak-Jacelon algebra2018

    • Author(s)
      Nawata Norio
    • Journal Title

      Proceedings of the London Mathematical Society

      Volume: 118 Issue: 3 Pages: 545-576

    • DOI

      10.1112/plms.12195

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Rohlin actions of finite groups on W2019

    • Author(s)
      縄田紀夫
    • Organizer
      RIMS共同研究 作用素環論の最近の進展
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] WへのRohlin作用について2019

    • Author(s)
      縄田紀夫
    • Organizer
      日本数学会 2019年度秋季総合分科会
    • Related Report
      2019 Annual Research Report
  • [Presentation] WへのRohlin作用について2019

    • Author(s)
      縄田紀夫
    • Organizer
      作用素環論研究会
    • Related Report
      2018 Research-status Report
  • [Presentation] 中心列C*-環の無限性について2018

    • Author(s)
      縄田紀夫
    • Organizer
      日本数学会2018年度秋季総合分科会
    • Related Report
      2018 Research-status Report
  • [Presentation] Trace scaling automorphisms of W\otimes K2017

    • Author(s)
      縄田紀夫
    • Organizer
      日本数学会2017年度秋季総合分科会
    • Related Report
      2017 Research-status Report
  • [Presentation] Trace scaling automorphisms of W\otimes K2017

    • Author(s)
      Norio Nawata
    • Organizer
      Applications of the UCT for C*-algebras
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Trace scaling automorphisms of certain stably projectionless C*-algebras2017

    • Author(s)
      Norio Nawata
    • Organizer
      RIMS共同研究「量子情報理論に関連した作用素環論における諸問題の研究」
    • Place of Presentation
      京都大学数理解析研究所 (京都府京都市)
    • Related Report
      2016 Research-status Report
    • Invited
  • [Presentation] Examples of simple stably projectionless C*-algebras with non-zero pairings2016

    • Author(s)
      Norio Nawata
    • Organizer
      YMC*A
    • Place of Presentation
      University of Munster (ドイツ)
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Examples of simple stably projectionless C*-algebras with non-zero pairings2016

    • Author(s)
      縄田紀夫
    • Organizer
      日本数学会2016年度秋季総合分科会
    • Place of Presentation
      関西大学 (大阪府吹田市)
    • Related Report
      2016 Research-status Report
  • [Remarks] Publication list

    • URL

      http://www.osaka-kyoiku.ac.jp/~nawata/Publications.html

    • Related Report
      2017 Research-status Report

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Published: 2016-04-21   Modified: 2021-02-19  

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