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Inverse problems for degenerate hyperbolic partial differential equations on manifolds

Research Project

Project/Area Number 22K20340
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0201:Algebra, geometry, analysis, applied mathematics,and related fields
Research InstitutionKyushu University

Principal Investigator

Takase Hiroshi  九州大学, マス・フォア・インダストリ研究所, 助教 (60963204)

Project Period (FY) 2022-08-31 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2023: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords逆問題 / 非適切問題 / 偏微分方程式 / 非適切性問題 / 双曲型偏微分方程式 / 楕円型偏微分方程式 / 一意接続性 / 逆問題解析 / 退化型偏微分方程式 / 幾何解析
Outline of Research at the Start

境界でローレンツ計量が発散する多様体上の波動方程式は退化双曲型偏微分方程式に分類され,多様体内部の情報を境界での観測データから抽出することは物理学においても重要な課題である.そこで未知の波源を決定する逆問題及び方程式中の未知係数を決定する逆問題に対し,一意性及び安定性評価を確立する.

Outline of Final Research Achievements

He studied an inverse problem for a system of hyperbolic partial differential equations written in terms of the Laplace-Beltrami operator on a Lorentzian manifold. He established a weighted energy estimate, the Carleman estimate, for this system and proved a global Lipschitz stability when the observation data is taken on a part of the boundary of the Lorentzian manifold. Furthermore, he proved a global Lipschitz stability for an inverse source problem of determining the source term of a one-dimensional wave equation with an inverse square potential.

Academic Significance and Societal Importance of the Research Achievements

重力波を記述するような曲がった空間上における波動方程式の未知波源項を決定する逆問題に対し,安定性評価を証明した.これにより,境界における解の観測誤差が小さければ,未知の波源項同士の差も小さく,未知量が安定的に決定できることが分かる.

Report

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

    (21 results)

All 2024 2023 2022 Other

All Int'l Joint Research (3 results) Journal Article (2 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (13 results) (of which Int'l Joint Research: 8 results,  Invited: 11 results) Remarks (3 results)

  • [Int'l Joint Research] ローマ・ラ・サピエンツァ大学(イタリア)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] ロレーヌ大学(フランス)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] Sapienza Universita di Roma(イタリア)

    • Related Report
      2022 Research-status Report
  • [Journal Article] Global Lipschitz stability for inverse problems of wave equations on Lorentzian manifolds2023

    • Author(s)
      Hiroshi Takase
    • Journal Title

      Journal of Differential Equations

      Volume: 372 Pages: 564-590

    • DOI

      10.1016/j.jde.2023.07.001

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] A Carleman estimate and an energy method for a first-order symmetric hyperbolic system2022

    • Author(s)
      Floridia Giuseppe、Takase Hiroshi、Yamamoto Masahiro
    • Journal Title

      Inverse Problems and Imaging

      Volume: 16 Issue: 5 Pages: 1163-1163

    • DOI

      10.3934/ipi.2022016

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Inverse source problems for wave equations with inverse square potentials2024

    • Author(s)
      Hiroshi Takase
    • Organizer
      The 41th Kyushu Symposium on Partial Differential Equations
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Inverse source problems for wave equations with inverse square potentials2024

    • Author(s)
      Hiroshi Takase
    • Organizer
      2024 Japan-Taiwan Joint Workshop on Numerical Analysis and Inverse Problems
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 漸近的アンチドジッター空間における波動方程式の一意接続性2023

    • Author(s)
      髙瀬裕志
    • Organizer
      九大幾何学セミナー
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Unique continuation for wave equations in asymptotically anti-de Sitter spaces2023

    • Author(s)
      Hiroshi Takase
    • Organizer
      Congress on Industrial and Applied Mathematics
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Lipschitz stability for inverse source problems of waves on Lorentzian manifolds2023

    • Author(s)
      Hiroshi Takase
    • Organizer
      11th Applied Inverse Problems Conference
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Global Lipschitz stability for inverse source problems of Lorentzian wave equations2023

    • Author(s)
      Hiroshi Takase
    • Organizer
      Joint Fudan-RICAM Seminar on Inverse Problems
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Inverse problems for first-order hyperbolic equations2023

    • Author(s)
      Hiroshi Takase
    • Organizer
      The 59th ANZIAM Conference
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Inverse source problems for wave equations on Lorentzian manifolds2022

    • Author(s)
      Hiroshi Takase
    • Organizer
      10th International Conference “Inverse Problems: Modeling and Simulation”
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Inverse source problems for wave equations on Lorentzian manifolds2022

    • Author(s)
      髙瀬裕志
    • Organizer
      現象数理セミナー
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] Inverse source problems for symmetric hyperbolic systems of first-order2022

    • Author(s)
      髙瀬裕志
    • Organizer
      九州関数方程式セミナー
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] 一階対称双曲型方程式における 波源項決定逆問題2022

    • Author(s)
      髙瀬裕志
    • Organizer
      日本応用数理学会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] Unique continuation for wave equations in asymptotically anti-de Sitter spaces2022

    • Author(s)
      Hiroshi Takase
    • Organizer
      若手研究集会「波動・振動・流れの制御と逆問題-理論と数値計算-」
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] Unique continuation for wave equations in asymptotically anti-de Sitter spaces2022

    • Author(s)
      Hiroshi Takase
    • Organizer
      Recent advances in direct and inverse problems for PDEs and applications
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Remarks] researchmap

    • URL

      https://researchmap.jp/Hiroshi_Takase

    • Related Report
      2023 Annual Research Report
  • [Remarks] Research map

    • URL

      https://researchmap.jp/Hiroshi_Takase

    • Related Report
      2022 Research-status Report
  • [Remarks] 九州大学研究者情報

    • URL

      https://hyoka.ofc.kyushu-u.ac.jp/search/details/K008181/index.html

    • Related Report
      2022 Research-status Report

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Published: 2022-09-01   Modified: 2025-01-30  

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