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Study on topological structure and algebraic structure of multiplication and composition of analytic functions

Research Project

Project/Area Number 16K05190
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Basic analysis
Research InstitutionIbaraki University

Principal Investigator

Hosokawa Takuya  茨城大学, 理工学研究科(工学野), 准教授 (90553579)

Co-Investigator(Kenkyū-buntansha) 大野 修一  日本工業大学, 工学部, 准教授 (20265367)
瀬戸 道生  防衛大学校(総合教育学群、人文社会科学群、応用科学群、電気情報学群及びシステム工学群), 総合教育学群, 准教授 (30398953)
岡 裕和  茨城大学, 理工学研究科(工学野), 教授 (90257254)
阿部 敏一  茨城大学, 理工学研究科(工学野), 助教 (40749157)
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords合成作用素 / 荷重付き合成作用素 / 解析関数空間 / 複素解析学 / 積分作用素 / 樹形グラフ / 荷重合成作用素 / ツリー / リプシッツ空間 / 関数解析学
Outline of Final Research Achievements

(1) We characterized the compactness of composition operators induced by the products of two analytic self-maps on the Bloch space under some assumptions. We also characterized the boundedness on the little Bloch space.
(2) We characterized the boundedness and the compactness of weighted composition operators acting from the Lipschitz space to the space of bounded functions on a tree. We also characterized the boundedness and the compactness of integral operators between the weighted Lipschitz spaces on a tree.
(3) We characterized the boundedness and the compactness of integral operators acting from the Bergman spaces to the BMOA-type spaces on the unit disk.

Academic Significance and Societal Importance of the Research Achievements

本研究で得られた成果は、無限次元の自由度を持つ作用素と呼ばれる対象の性質を、対応するシンボル関数の有限次元の幾何学的情報で特徴付けるものである。
この様な研究の蓄積により、非常に複雑な現象を、断片的な情報を組み合わせて表現し、少しずつ理解できるようになることが期待される。

Report

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

    (38 results)

All 2019 2018 2017 2016

All Journal Article (5 results) (of which Peer Reviewed: 5 results) Presentation (33 results) (of which Int'l Joint Research: 2 results,  Invited: 7 results)

  • [Journal Article] Characterization of distributive semigroup operations on the positive real numbers2019

    • Author(s)
      Takahasi Sin-Ei、Miura Takeshi、Oka Hirokazu
    • Journal Title

      Semigroup Forum

      Volume: online Issue: 2 Pages: 1-20

    • DOI

      10.1007/s00233-019-10006-3

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The Toeplitzness of weighted composition operators2018

    • Author(s)
      大野修一
    • Journal Title

      Commun. Korean Math. Soc.

      Volume: 33 Pages: 507-513

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Semigroup operations distributed by the ordinary multiplication or addition on the real numbers2017

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

      Publ Math. Debrecen

      Volume: 91 Issue: 3-4 Pages: 297-307

    • DOI

      10.5486/pmd.2017.7560

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Finitely generated gyrovector subspaces and orthogonal gyrodecomposition in the M\"obius gyrovector space2017

    • Author(s)
      Toshikazu Abe and Keiich Watanabe
    • Journal Title

      Journal of Mathematical Analysis and Applications

      Volume: 449 Issue: 1 Pages: 77-90

    • DOI

      10.1016/j.jmaa.2016.11.039

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] The equivalence of gyrocommutative gyrogroups and K-loops2017

    • Author(s)
      Toshikazu Abe
    • Journal Title

      Nihonkai Mathematical Journal

      Volume: 28 Pages: 69-78

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Presentation] Composition operators induced by products of analytic self-maps2019

    • Author(s)
      Takuya Hosokawa and Shuichi Ohno
    • Organizer
      AMS Sectional Meeting AMS Special Session
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Algebraic structures on R^+ for means2019

    • Author(s)
      阿部敏一
    • Organizer
      Research on isometries as preserver problems and related topics
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] メビウスジャイロベクトル空間の構造について2019

    • Author(s)
      阿部敏一
    • Organizer
      2018年度つくばセミナー
    • Related Report
      2018 Annual Research Report
  • [Presentation] 写像の葉数と作用素の挙動について2018

    • Author(s)
      細川卓也
    • Organizer
      第2回防大函数解析セミナー
    • Related Report
      2018 Annual Research Report
  • [Presentation] Integral operators on function spaces on trees2018

    • Author(s)
      細川卓也
    • Organizer
      第3回防大函数解析セミナー
    • Related Report
      2018 Annual Research Report
  • [Presentation] On some operators on function spaces on trees2018

    • Author(s)
      細川卓也
    • Organizer
      Real, Complex and Functional Analysis Seminar 2018
    • Related Report
      2018 Annual Research Report
  • [Presentation] Integral operators acting from Bergman spaces to BMOA-type spaces2018

    • Author(s)
      細川卓也
    • Organizer
      2018年度関数環研究集会
    • Related Report
      2018 Annual Research Report
  • [Presentation] ハーディ空間上の作用素論と不定値内積空間2018

    • Author(s)
      瀬戸道生
    • Organizer
      作用素論・作用素環論研究集会
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] Applications of de Branges-Rovnyak decomposition to Graph Theory2018

    • Author(s)
      Michio Seto
    • Organizer
      Recent Advances in Operator Theory and Operator Algebras 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Mean に対する代数構造2018

    • Author(s)
      阿部敏一
    • Organizer
      第2回防大函数解析セミナー
    • Related Report
      2018 Annual Research Report
  • [Presentation] mean と代数的中点2018

    • Author(s)
      阿部敏一
    • Organizer
      第92回米沢数学セミナー
    • Related Report
      2018 Annual Research Report
  • [Presentation] 平均を代数的中点にもつ代数構造について2018

    • Author(s)
      阿部敏一
    • Organizer
      第55回関東作用素論セミナー
    • Related Report
      2018 Annual Research Report
  • [Presentation] A geometric inequality and isometries on the positive cone2018

    • Author(s)
      Toshikazu Abe and Osamu Hatori
    • Organizer
      日本数学会2018年度秋季総合分科会
    • Related Report
      2018 Annual Research Report
  • [Presentation] ジャイロベクトル空間と2-cocycleの関係について2018

    • Author(s)
      阿部敏一
    • Organizer
      第3回防大函数解析セミナー
    • Related Report
      2018 Annual Research Report
  • [Presentation] Algebraic structures for means2018

    • Author(s)
      阿部敏一
    • Organizer
      2018年度関数環研究集会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Differences of composition operators between Banach spaces on Tree2018

    • Author(s)
      細川卓也
    • Organizer
      第5回日立解析学セミナー
    • Related Report
      2017 Research-status Report
  • [Presentation] Operators on model spaces2018

    • Author(s)
      大野修一
    • Organizer
      第5回日立解析学セミナー
    • Related Report
      2017 Research-status Report
  • [Presentation] Composition operators on Hardy and weighted Bergman spaces2018

    • Author(s)
      大野修一
    • Organizer
      第42回東北複素解析セミナー
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] 平均に関する代数構造について2018

    • Author(s)
      阿部 敏一
    • Organizer
      第5回日立解析学セミナー
    • Related Report
      2017 Research-status Report
  • [Presentation] Algebraic structures for means2018

    • Author(s)
      阿部 敏一
    • Organizer
      RIMS共同研究(公開型)等距離写像理論と保存問題の多様な視点からの研究
    • Related Report
      2017 Research-status Report
  • [Presentation] Composition operators induced by products of self-maps2017

    • Author(s)
      細川卓也
    • Organizer
      Real, Complex and Functional Analysis Seminar 2017
    • Related Report
      2017 Research-status Report
  • [Presentation] Composition operators with product symbols2017

    • Author(s)
      細川卓也
    • Organizer
      第40回東北複素解析セミナー
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] 解析関数空間上の合成作用素の成す集合の位相構造について2017

    • Author(s)
      細川卓也
    • Organizer
      第45回関東作用素論セミナー
    • Related Report
      2017 Research-status Report
  • [Presentation] Operator theoretic differences between weighted Bergman and Dirichlet spaces2017

    • Author(s)
      大野修一
    • Organizer
      2017 Conference on Function Algebras
    • Related Report
      2017 Research-status Report
  • [Presentation] The Toeplitzness of weighted composition operators2017

    • Author(s)
      大野修一
    • Organizer
      日本数学会秋季総合分科会,函数解析学分科会
    • Related Report
      2017 Research-status Report
  • [Presentation] 正定値行列全体のジャイロ構造について2017

    • Author(s)
      阿部 敏一
    • Organizer
      作用素論・作用素環論研究集会 2017
    • Related Report
      2017 Research-status Report
  • [Presentation] 半正定値行列の基本的な性質について2017

    • Author(s)
      阿部 敏一
    • Organizer
      第4回日立解析学セミナー
    • Related Report
      2017 Research-status Report
  • [Presentation] ジャイロ群に基づく線形空間の一般化とその部分空間2017

    • Author(s)
      阿部 敏一
    • Organizer
      第44回関東作用素論セミナー
    • Related Report
      2017 Research-status Report
  • [Presentation] The Toeplitzness of weighted composition operators2016

    • Author(s)
      大野修一
    • Organizer
      関数環研究集会
    • Place of Presentation
      茨城大学・工学部(茨城県日立市)
    • Year and Date
      2016-12-04
    • Related Report
      2016 Research-status Report
  • [Presentation] de Leeuw-Rudin's condition and products of analytic self-maps of the unit disk2016

    • Author(s)
      細川卓也
    • Organizer
      関数環研究集会
    • Place of Presentation
      茨城大学・工学部(茨城県日立市)
    • Year and Date
      2016-12-02
    • Related Report
      2016 Research-status Report
  • [Presentation] 正則関数の組から導かれるクレイン空間上の等距離写像について2016

    • Author(s)
      瀬戸道生
    • Organizer
      等距離写像研究の多角的アプローチ
    • Place of Presentation
      京都大学数理解析研究所
    • Year and Date
      2016-10-31
    • Related Report
      2016 Research-status Report
  • [Presentation] Topological properties of path connected components in spaces of weighted composition operators into L∞2016

    • Author(s)
      泉池 敬司, 泉池 佑子, 大野修一
    • Organizer
      日本数学会秋季総合分科会,函数解析学分科会
    • Place of Presentation
      関西大学(大阪府吹田市)
    • Year and Date
      2016-09-16
    • Related Report
      2016 Research-status Report
  • [Presentation] The hyperbolic derivatives of products of analytic self-maps of the unit disk2016

    • Author(s)
      大野修一
    • Organizer
      International Workshop on Function Theory
    • Place of Presentation
      Korea University, Seoul (Korea),
    • Year and Date
      2016-09-09
    • Related Report
      2016 Research-status Report
    • Invited

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Published: 2016-04-21   Modified: 2020-03-30  

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