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Geometric analysis of higher-order dispersive flows

Research Project

Project/Area Number 20K03703
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 12020:Mathematical analysis-related
Research InstitutionKochi University

Principal Investigator

Eiji Onodera  高知大学, 教育研究部自然科学系理工学部門, 准教授 (70532357)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2023: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2022: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Keywords非線型分散型偏微分方程式 / 偏微分方程式の初期値問題 / 分散型偏微分方程式 / 分散型写像流
Outline of Research at the Start

分散型写像流方程式とは、ある種の曲がったリーマン多様体に値を取る写像流がみたす分散型偏微分方程式の総称である。これらの具体例は数理物理学や可積分系理論との関連において現れるが、解が値を取る像空間として、実2次元球面やエルミート対称空間などのケーラー多様体が設定されることが多い。本研究では、偏微分方程式論の視点を積極的に用いて、幾つかの高階(4階以上)の分散型写像流方程式の初期値問題に対する解法研究の深化・展開を試みる。

Outline of Final Research Achievements

This research mainly focused on a fourth-order dispersive partial differential equation and the initial value problem for curve flows on a compact K\"ahler manifold. The outline of the research achievements is stated as follows:
(1)We investigated the above initial value problem for closed curve flows on a compact locally Hermitian symmetric space,and proved the uniqueness of a solution for initial data in a Sobolev space with high regularlity.
(2)We investigated the above equation for open curve flows on a compact K\"ahler manifold, and presented a framework that can transform the equation into a system of fourth-order nonlinear dispersive partial differential-integral equations for complex-valued functions, which was achieved by developing the so-called generalized Hasimoto transformation. Moreover, we verified the local-wellposedness of the initial value problem for a related nonlinear system satisfied by complex-valued functions.

Academic Significance and Societal Importance of the Research Achievements

上記成果(1)について:閉曲線流の場合の像空間への設定という意味ではこれ以上の緩和はほぼ不可能と思われる局所エルミート対称性のもとで初期値問題が一意可解であることが確認された。そのために考案した、像空間をユークリッド空間に等長的に埋め込んだときの局所エルミート対称性の利用法は、他の類似的問題への応用も期待される。
上記成果(2)について:像空間が高次元コンパクトケーラー多様体である場合も含めて統一的に扱うことのできる変換法が与えられた。複素次元が2以上のコンパクトケーラー多様体の構造と単独でない非線型4階分散型偏微分方程式系の構造との対応という融合的観点から更なる研究の発展が期待される。

Report

(4 results)
  • 2023 Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (2 results)

All 2022 2021

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 1 results)

  • [Journal Article] Uniqueness of 1D Generalized Bi-Schroedinger Flow2022

    • Author(s)
      Onodera Eiji
    • Journal Title

      The Journal of Geometric Analysis

      Volume: 32 Issue: 2

    • DOI

      10.1007/s12220-021-00787-x

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] A fifth-order dispersive partial differential equation for curve flow on the sphere2021

    • Author(s)
      Onodera Eiji、Yamasaki Haruka
    • Journal Title

      Journal of Mathematical Analysis and Applications

      Volume: 503 Issue: 1 Pages: 125297-125297

    • DOI

      10.1016/j.jmaa.2021.125297

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access

URL: 

Published: 2020-04-28   Modified: 2025-01-30  

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