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Studies on composition operators and spectrum-preserving maps

Research Project

Project/Area Number 18540167
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Basic analysis
Research InstitutionShinshu University

Principal Investigator

TAKAGI Hiroyuki  Shinshu University, 理学部, 教授 (20206725)

Co-Investigator(Kenkyū-buntansha) TAKAHASI Sin-ei  山形大学大学院, 理工学研究科, 教授 (50007762)
Project Period (FY) 2006 – 2008
Project Status Completed (Fiscal Year 2008)
Budget Amount *help
¥2,160,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥360,000)
Fiscal Year 2008: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2007: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2006: ¥600,000 (Direct Cost: ¥600,000)
Keywords合成作用素 / 関数環 / バナッハ環 / スペクトル / 保存問題 / シフト作用素
Research Abstract

合成作用素の従来の研究をもとに, スペクトル保存写像と合成作用素の関連を調べた. そして, 単位的な半単純可換バナッハ環の間で, 乗法的にスペクトルを保存する全射の写像が, 合成作用素に似た形で表現できることを証明した. さらに, 末梢スペクトルの保存でも同様の結果を導いた. これらは, バナッハ環の保存問題への部分解答である. また, バナッハ空間上のシフト作用素の研究や, ハイヤーズ・ウラム安定性の応用面の開拓なども行った.

Report

(4 results)
  • 2008 Annual Research Report   Final Research Report ( PDF )
  • 2007 Annual Research Report
  • 2006 Annual Research Report
  • Research Products

    (28 results)

All 2009 2008 2007 2006 Other

All Journal Article (21 results) (of which Peer Reviewed: 18 results) Presentation (5 results) Book (2 results)

  • [Journal Article] A Cauchy-Euler type factorization of operators2008

    • Author(s)
      S.-E. Takahasi, H. Oka, T. Miura, H. Takagi
    • Journal Title

      Tokyo J. Math 31

      Pages: 489-493

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] A perturbations of normal operators on Hilbert Space2008

    • Author(s)
      T. Miura, A. Uchiyama, H. Oka, G. Hirasawa and S.-E. Takahasi
    • Journal Title

      Nonlinear Funct. Anal Appl. 13

      Pages: 291-297

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] On surjective ring homomorphisms between semi-simple commutative Banach algebras2008

    • Author(s)
      T. Miura, S.-E. Takahasi, N. Niwa and H. Oka
    • Journal Title

      Publ. Math Debrecen 73

      Pages: 119-131

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] A Cauchy-Euler type factorization of operators2008

    • Author(s)
      S. -E. Takahasi, H. Oka, T. Miura, H. Takag I
    • Journal Title

      Tokyo J. Math. 31

      Pages: 489-493

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A generalization of Wang's inequality2007

    • Author(s)
      T. Miura, H. Takagi, S.-E. Takahasi
    • Journal Title

      Applied Functional Analysis, Yokohama Publ.

      Pages: 203-210

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] 2-local isometries and 2-local automorphisms on uniform algebras2007

    • Author(s)
      O. Hatori, T. Miura, H. Oka and H. Takagi
    • Journal Title

      Int. Math Forum 2

      Pages: 2491-2502

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Exponential type functional equation andits Hyers-Ulam stability2007

    • Author(s)
      S.-E. Takahasi, T. Miura, H. Takagi
    • Journal Title

      J. Math. Anal 329

      Pages: 1191-1203

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Unital and multiplicatively spectrumpreserving surjections between semisimple commutative Banach algebras are linear and multiplicative2007

    • Author(s)
      O.Hatori, T. Miura and H. Takagi
    • Journal Title

      J.Math. Anal. 326

      Pages: 281-296

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Superstability of multipliers and ring homomorphisms on Banach algebras2007

    • Author(s)
      T. Miura, H. Oka, G. Hirasawa and S.-E. Takahasi
    • Journal Title

      Banach J.Math. Anal. 1

      Pages: 125-135

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] On Wirtinger's inequality and its elementary proof2007

    • Author(s)
      S.-E. Takahasi, T. Miura and T. Hayata
    • Journal Title

      Math. Inequal. Appl 10

      Pages: 311-319

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] On characterizations of the image of the Gelfand transform of commutative Banach algebras2007

    • Author(s)
      J. Inoue and S.-E. Takahasi
    • Journal Title

      Math. Nachr. 280

      Pages: 105-126

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Unital and multiplicatively spectrum-preserving surjections between semi-simple commutative Banach algebras are linear and multiplicative2007

    • Author(s)
      Osamu Hatori, Takeshi Miura, Hiroyuki Takagi
    • Journal Title

      Journal of Mathematical Analysis and Applications 326

      Pages: 281-296

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Exponential type functional equation and its Hyers-Ulam stability2007

    • Author(s)
      Sin-Ei Takahasi, Takeshi Miura, Hiroyuki Takagi
    • Journal Title

      Journal of Mathematical Analysis and Applications 329

      Pages: 1191-1203

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Continuously differentiable means2006

    • Author(s)
      J.-I. Fujii, M. Fujii, T. Miura, H. Takagi and S.-E, Takahasi
    • Journal Title

      J.Inequal. Appl.

      Pages: 15-15

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] A reconsideration of Hua's inequality II2006

    • Author(s)
      J.-I. Fujii, M. Fujii, T. Miura, H. Takagi and S.-E. Takahasi
    • Journal Title

      J.Inequal. Appl.

      Pages: 8-8

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Characterizations of isometric isomorphisms between uniform algebras via nonlinear range-preserving properties2006

    • Author(s)
      O.Hatori, T. Miura and H. Takagi
    • Journal Title

      Proc.Amer.Math 134

      Pages: 2923-2930

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Note on the Hyers-Ulam-Rassias stability of the first order linear differential equation2006

    • Author(s)
      T. Miura, G. Hirasawa and S.-E. Takahasi
    • Journal Title

      Nonlinear Funct. Anal. Appl. 11

      Pages: 851-858

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] A perturbation of ring derivations on Banach algebras2006

    • Author(s)
      T. Miura, G. Hirasawa and S.-E. Takahasi
    • Journal Title

      J.Math.Anal.Appl. 319

      Pages: 522-530

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Characterizations of isometric isomorphisms between uniform algebras via nonlinear range-preserving properties2006

    • Author(s)
      Osamu Hatori, Takeshi Miura, Hiroyuki Takagi
    • Journal Title

      Proceeding of the American Mathematical Society 134

      Pages: 2923-2930

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Superstability of generalized multiplicative functionals

    • Author(s)
      T. Miura, H. Takagi, M. Tsukada and S.-E. Takahasi
    • Journal Title

      to appear in J. Inequal. Appl.

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Peripheral multiplicativitiy of maps on uniformly closed algebras of continuous functions which vanish at infinity

    • Author(s)
      O. Hatori, T. Miura, H. Oka and H. Takagi
    • Journal Title

      to appear in Tokyo J. Math.

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Presentation] シフト作用素に関する2・3の注意2009

    • Author(s)
      古清水大直,高木啓行
    • Organizer
      つくばセミナー
    • Place of Presentation
      筑波大学
    • Year and Date
      2009-03-10
    • Related Report
      2008 Annual Research Report 2008 Final Research Report
  • [Presentation] 可換Banach環を知ろう2008

    • Author(s)
      高橋眞映
    • Organizer
      日本数学会
    • Place of Presentation
      近畿大学
    • Year and Date
      2008-03-25
    • Related Report
      2008 Final Research Report
  • [Presentation] バナッハ空間でシフト作用素を考える2007

    • Author(s)
      高木啓行
    • Organizer
      つくばセミナー
    • Place of Presentation
      筑波大学
    • Year and Date
      2007-11-21
    • Related Report
      2008 Final Research Report
  • [Presentation] バナッハ空間でシフト作用素を考える2007

    • Author(s)
      高木 啓行
    • Organizer
      バナッハ環セミナー
    • Place of Presentation
      筑波大学
    • Year and Date
      2007-11-21
    • Related Report
      2007 Annual Research Report
  • [Presentation] シフト作用素の一般化について2006

    • Author(s)
      高木啓行
    • Organizer
      関数環研究集会
    • Place of Presentation
      岩手医科大学
    • Year and Date
      2006-12-03
    • Related Report
      2008 Final Research Report
  • [Book] 『翻訳書』スタイン&シャカルチ「フーリエ解析入門」(プリンストン解析講義)2007

    • Author(s)
      新井仁之・杉本充・高木啓行・千原浩之(訳者)
    • Publisher
      日本評論社
    • Related Report
      2008 Final Research Report
  • [Book] フーリエ解析入門(プリンストン解析学講義I)2007

    • Author(s)
      エリアス・M・スタイン, ラミ・シャカルチ 著, 新井仁之, 杉本充, 高木啓行, 千原浩之 訳
    • Total Pages
      312
    • Publisher
      日本評論社
    • Related Report
      2006 Annual Research Report

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Published: 2006-04-01   Modified: 2016-04-21  

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