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Gabor analysis and related topics

Research Project

Project/Area Number 22K03328
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 12010:Basic analysis-related
Research InstitutionHokkaido University

Principal Investigator

Kobayashi Masaharu  北海道大学, 理学研究院, 教授 (30516480)

Project Period (FY) 2022-04-01 – 2025-03-31
Project Status Completed (Fiscal Year 2024)
Budget Amount *help
¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2024: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2023: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2022: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Keywords関数空間 / モジュレーション空間 / フーリエ・ルベーグ空間 / 作用関数 / スペクトル合成集合 / Gabor解析 / 関数空間論
Outline of Research at the Start

「Gabor解析」とは、ホログラフィーの研究でノーベル物理学賞を受賞したD. Gabor氏が1946年に発表した論文の中で用いた「Gauss 関数の平行移動と変調により生成される関数系を用いて、Fourier 級数展開のようにR上の関数を展開する」というアイデアから発展した研究分野である。本研究では、Gabor解析における重要な研究テーマであり、これまで互いに影響を及ぼしあいながら発展してきた「Modulation空間」と「Gabor系の線形独立性問題」を研究する。

Outline of Final Research Achievements

Through this project, we have clarified the basic properties of function spaces, which play an important role in the study of harmonic analysis and partial differential equations.The main results are as follows:
(1) We have obtained a characterization of operating functions on some function spaces.
(2) We have clarified the properties of modulation spaces as Banach algebras (such as the Wiener-Levi theorem).

Academic Significance and Societal Importance of the Research Achievements

ガボール解析において重要な役割を果たすモジュレーション空間(やそれに関連するような関数空間)はウェーブレットの理論の発展と共に、擬微分作用素やシュレディンガー方程式の研究などにおいて多くの興味深い研究成果を生み出してきた。しかし、新たな研究成果を生み出すには明らかにすべき多くの問題が残っている。今回得られた成果はこれらの問題の解決、更には調和解析や偏微分方程式の研究において現れる様々な関数空間や作用素の研究にも重要な役割を果たすと考えられる。

Report

(4 results)
  • 2024 Annual Research Report   Final Research Report ( PDF )
  • 2023 Research-status Report
  • 2022 Research-status Report
  • Research Products

    (15 results)

All 2025 2024 2023 2022 Other

All Int'l Joint Research (4 results) Journal Article (3 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (8 results) (of which Int'l Joint Research: 1 results,  Invited: 7 results)

  • [Int'l Joint Research] ウィーン大学(オーストリア)

    • Related Report
      2024 Annual Research Report
  • [Int'l Joint Research] ウィーン大学(オーストリア)

    • Related Report
      2023 Research-status Report
  • [Int'l Joint Research] ジョージア工科大学/タフツ大学(米国)

    • Related Report
      2023 Research-status Report
  • [Int'l Joint Research] トリノ大学(イタリア)

    • Related Report
      2023 Research-status Report
  • [Journal Article] On some properties of modulation spaces as Banach algebras2025

    • Author(s)
      Feichtinger Hans G.、Kobayashi Masaharu、Sato Enji
    • Journal Title

      Studia Mathematica

      Volume: 280 Issue: 1 Pages: 55-86

    • DOI

      10.4064/sm240316-9-9

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Further study of modulation spaces as Banach algebras2024

    • Author(s)
      Feichtinger Hans G.、Kobayashi Masaharu、Sato Enji
    • Journal Title

      Annales Universitatis Scientiarum Budapestinensis de Rolando Etvs Nominatae. Sectio computatorica

      Volume: 56 Issue: 56 Pages: 151-166

    • DOI

      10.71352/ac.56.151

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A note on operating functions of modulation spaces2022

    • Author(s)
      Kobayashi Masaharu、Sato Enji
    • Journal Title

      Journal of Pseudo-Differential Operators and Applications

      Volume: 13 Issue: 4

    • DOI

      10.1007/s11868-022-00494-3

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Presentation] On some properties of modulation spaces as Banach algebras2024

    • Author(s)
      小林政晴
    • Organizer
      調和解析定例セミナー
    • Related Report
      2024 Annual Research Report
    • Invited
  • [Presentation] On the spectral synthesis for the unit circle in ${\mathcal F} L_s^q ({\mathbf R}^2)$2024

    • Author(s)
      Masaharu Kobayashi
    • Organizer
      Winter Workshop: Fourier Analysis and its applications (Renyi Institute)
    • Related Report
      2023 Research-status Report
    • Int'l Joint Research
  • [Presentation] On the spectral synthesis for the unit circle in ${\mathcal F} L_s^q ({\mathbf R}^2)$2024

    • Author(s)
      Masaharu Kobayashi
    • Organizer
      Research Seminar Function Spaces (フリードリヒ・シラー大学イェーナ)
    • Related Report
      2023 Research-status Report
    • Invited
  • [Presentation] Operating Functions on A^q_s(T)2023

    • Author(s)
      Masaharu Kobayashi
    • Organizer
      Harmonic Analysis Seminar (ウィーン大学)
    • Related Report
      2023 Research-status Report
    • Invited
  • [Presentation] On the spectral synthesis for the unit circle in ${\mathcal F} L_s^q ({\mathbf R}^2)$2023

    • Author(s)
      Masaharu Kobayashi
    • Organizer
      Analysis Seminar (ジョージア工科大学)
    • Related Report
      2023 Research-status Report
    • Invited
  • [Presentation] On the spectral synthesis for the unit circle in ${\mathcal F} L_s^q ({\mathbf R}^2)$2023

    • Author(s)
      Masaharu Kobayashi
    • Organizer
      Analysis Seminar (タフツ大学)
    • Related Report
      2023 Research-status Report
    • Invited
  • [Presentation] On the spectral synthesis for the unit circle in ${\mathcal F} L_s^q ({\mathbf R}^2)$2023

    • Author(s)
      Masaharu Kobayashi
    • Organizer
      Seminari di Analisi Matematica dell'Universita e del Politecnico di Torino (トリノ大学)
    • Related Report
      2023 Research-status Report
    • Invited
  • [Presentation] Operating functions on A^q_s (T)2023

    • Author(s)
      小林政晴
    • Organizer
      偏微分方程式の解の特異性とその周辺
    • Related Report
      2022 Research-status Report
    • Invited

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Published: 2022-04-19   Modified: 2026-01-16  

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