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特異摂動の高階微分方程式の完全WKB解析

Research Project

Project/Area Number 15J06019
Research Category

Grant-in-Aid for JSPS Fellows

Allocation TypeSingle-year Grants
Section国内
Research Field Basic analysis
Research InstitutionHiroshima University

Principal Investigator

神本 晋吾  広島大学, 理学研究科, 特別研究員(PD)

Project Period (FY) 2015-04-24 – 2018-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywordsresurgent function / convolution product / 強正則列 / 多重総和可能性 / resurgent analysis / divergent series
Outline of Annual Research Achievements

1)Resurgent analysisに関して
平成28年度は平成27年度に得られた resurgent function の合成績に関する結果と, 非線形常微分方程式の不確定特異点における形式解の resurgence に関する結果に関しての論文の執筆を行った. また, resurgent function の合成績に関する結果を, より広いクラスの resurgent function に対する結果へと拡張する為, 曲線の長さだけでなく偏角の全変動にも依存して特異点の構造が複雑になっていく場合に関しての議論も行った. そして, 平成27年度に得られた手法の特異摂動型1階非線形常微分方程式への応用に関しても考察を行った. この場合には合成績だけでなく積分変換によっても形式解の Borel 変換像の特異点の構造が複雑になっていく. この大まかな構造に関しては把握できたが, 実用に向けては後一歩というところである.
2)一般多重総和可能性に関して
平成27年度は一般の強正則列に関する相対的 Watson の補題の証明を行ったが, これに付随して平成28年度は, 異なる growth index を持つ強正則列の組に対する accelleration 作用素の基本的性質の証明を行った.また, 等しい growth index を持つ強正則列の組に対する weak accelleration 作用素に関する考察も行ったが, よくわからない点が多く今後の課題となった.

Research Progress Status

翌年度、交付申請を辞退するため、記入しない。

Strategy for Future Research Activity

翌年度、交付申請を辞退するため、記入しない。

Report

(2 results)
  • 2016 Annual Research Report
  • 2015 Annual Research Report
  • Research Products

    (15 results)

All 2017 2016 2015 Other

All Int'l Joint Research (3 results) Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 3 results,  Open Access: 3 results,  Acknowledgement Compliant: 2 results) Presentation (8 results) (of which Int'l Joint Research: 5 results,  Invited: 5 results)

  • [Int'l Joint Research] Scuola Normale Superiore Pisa(イタリア)

    • Related Report
      2016 Annual Research Report
  • [Int'l Joint Research] Universidad de Valladolid(スペイン)

    • Related Report
      2016 Annual Research Report
  • [Int'l Joint Research] Scuola Normale Superiore(イタリア)

    • Related Report
      2015 Annual Research Report
  • [Journal Article] On the singularity structure of wkb solution of the boosted Whittaker equation: its relevance to resurgent functions with essential singularities2016

    • Author(s)
      S. Kamimoto, T. Kawai, T. Koike
    • Journal Title

      Lett. in Math. Phys.

      Volume: 106 Issue: 12 Pages: 1791-1815

    • DOI

      10.1007/s11005-016-0887-x

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Resurgence of formal series solutions of nonlinear differential and difference equations2016

    • Author(s)
      S. Kamimoto
    • Journal Title

      Proceedings of the Japan Academy, Series A, Mathematical Sciences

      Volume: 92 Issue: 8 Pages: 92-95

    • DOI

      10.3792/pjaa.92.92

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Nonlinear analysis with endlessly continuable functions2016

    • Author(s)
      S. Kamimoto and D. Sauzin
    • Journal Title

      RIMS Kokyuroku Bessatsu

      Volume: B57 Pages: 235-247

    • Related Report
      2016 Annual Research Report 2015 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Borel 総和法を用いた常微分方程式の漸近解析2015

    • Author(s)
      神本晋吾、小山民雄
    • Journal Title

      Rokko Lectures in Mathematics

      Volume: 23 Pages: 37-82

    • Related Report
      2015 Annual Research Report
  • [Presentation] Iterated convolution of resurgent functions2017

    • Author(s)
      S. Kamimoto
    • Organizer
      Seminario IMUVA
    • Place of Presentation
      Universidad de Valladolid, Valladolid, Spain
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Resurgence of formal series solutions of nonlinear differential and difference equations2016

    • Author(s)
      神本晋吾
    • Organizer
      複素領域の微分方程式、漸近解析とその周辺
    • Place of Presentation
      広島大学
    • Year and Date
      2016-03-07
    • Related Report
      2015 Annual Research Report
  • [Presentation] Iterated convolution of resurgent functions2016

    • Author(s)
      S. Kamimoto
    • Organizer
      Analyse complexe et Equations Differentielles
    • Place of Presentation
      University of Lille, Laboratoire Paul Painleve, Lille, France
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Iterated convolution of resurgent functions2016

    • Author(s)
      S. Kamimoto
    • Organizer
      Formal and Analytic Solutions of Partial Differential Equations
    • Place of Presentation
      the University of Lisbon, Lisbon, Portugal
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Exact asymptotics and resurgent analysis2016

    • Author(s)
      神本晋吾
    • Organizer
      広島複素解析・代数学・数理解析合同セミナー
    • Place of Presentation
      広島大学大学院理学研究科
    • Related Report
      2016 Annual Research Report
  • [Presentation] Iterated convolution of resurgent functions2016

    • Author(s)
      S. Kamimoto
    • Organizer
      Special Seminar
    • Place of Presentation
      東京大学国際高等研究所カブリ数物連携宇宙研究機構 (Kavli IPMU)
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Resurgence of formal series solutions of nonlinear differential and difference equations2016

    • Author(s)
      神本晋吾
    • Organizer
      古典解析セミナー
    • Place of Presentation
      東京大学大学院数理科学研究科
    • Related Report
      2016 Annual Research Report
  • [Presentation] Convolutions and analytical continuability of holomorphic functions2015

    • Author(s)
      Shingo Kamimoto
    • Organizer
      Analytic, Algebraic and Geometric Aspects of Differential Equations
    • Place of Presentation
      Banach center ( Poland )
    • Year and Date
      2015-09-16
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research / Invited

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Published: 2015-11-26   Modified: 2024-03-26  

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