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Geometry of partial differential equations and inverse problems

Research Project

Project/Area Number 18H01126
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 12020:Mathematical analysis-related
Research InstitutionTohoku University

Principal Investigator

SAKAGUCHI Shigeru  東北大学, 情報科学研究科, 名誉教授 (50215620)

Co-Investigator(Kenkyū-buntansha) 福泉 麗佳  東北大学, 情報科学研究科, 准教授 (00374182)
磯部 健志  一橋大学, 大学院経済学研究科, 教授 (10262255)
川上 竜樹  龍谷大学, 先端理工学部, 教授 (20546147)
船野 敬  東北大学, 情報科学研究科, 准教授 (40614144)
池畠 優  広島大学, 先進理工系科学研究科(工), 教授 (90202910)
Project Period (FY) 2018-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥17,030,000 (Direct Cost: ¥13,100,000、Indirect Cost: ¥3,930,000)
Fiscal Year 2021: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2019: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2018: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Keywords偏微分方程式 / 幾何学 / 逆問題 / 複合媒質 / 囲い込み法 / 拡散方程式 / 固有値 / ヘルムホルツ方程式 / 安定解 / 二相熱伝導体 / ディラック-調和写像 / 熱方程式 / 非線形対数型拡散方程式 / 関数方程式論 / 幾何解析 / 実関数論 / 数理物理 / ディラック・調和写像 / ノイマン固有値 / 非線形シュレディンガー方程式 / 不変等温面 / 熱弾性体の方程式系 / p-ラプラシアンの固有値 / 不変等熱流面 / ラプラシアンの固有関数
Outline of Final Research Achievements

We studied geometry and inverse problems through partial differential equations focusing on the geometric properties of solutions. Some notable achievements are: the proof that if the interface in two-phase heat conductors has a constant temperature, then it must be a hyperplane; the existence of non-trivial nearly neutral conductors giving less influence on any uniform electric field; a construction of the first Dirichlet eigenfunction on the upper half of a topological torus whose geometric shape is clear; a proposal of a new isoperimetric problem on composite media and its solution; a study on the large time behavior of solutions of the Cauchy problem for the two-phase heat diffusion equations on composite media.

Academic Significance and Societal Importance of the Research Achievements

物理学や工学に現れる複合媒質(複合材料)の数理モデルは自然な研究対象であり, 例えば既知の媒質に含まれる未知の介在物を探索する逆問題など学術的にも社会的にも意義がある。数理モデルの多くは偏微分方程式で記述される。単一媒質上の偏微分方程式はよく研究されているが, 複合媒質上の偏微分方程式は単純な数理モデルに限っても未解明な部分が多い。本研究では,複合媒質の幾何学的形状とそれを決定する逆問題の解明など,学術的意義が顕著な成果が得られている。数学の分野(偏微分方程式論, 幾何解析, 逆問題)への貢献も大きい。

Report

(5 results)
  • 2022 Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • Research Products

    (141 results)

All 2023 2022 2021 2020 2019 2018 Other

All Int'l Joint Research (14 results) Journal Article (48 results) (of which Int'l Joint Research: 21 results,  Peer Reviewed: 48 results,  Open Access: 11 results) Presentation (73 results) (of which Int'l Joint Research: 37 results,  Invited: 68 results) Remarks (2 results) Funded Workshop (4 results)

  • [Int'l Joint Research] Inha University(韓国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Lorraine University(フランス)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] ローマ大学/フィレンツェ大学(イタリア)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Friedrich-Alexander University(ドイツ)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Inha University(韓国)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] Lorraine University(フランス)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] フィレンツェ大学/ローマ大学(イタリア)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] ロレーヌ大学(フランス)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] ICMAT 研究所(スペイン)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] 仁荷大学校(韓国)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] 浙江工業大学(中国)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] フィレンツェ大学(イタリア)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] ロレーヌ大学(フランス)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] ICMAT 研究所(スペイン)

    • Related Report
      2018 Annual Research Report
  • [Journal Article] Solutions of spinorial Yamabe-type problems on S^m: Perturbations and applications2023

    • Author(s)
      Isobe Takeshi, Xu Tian
    • Journal Title

      Transactions of American Mathematical Society

      Volume: 印刷中

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Extracting discontinuity using the probe and enclosure methods2023

    • Author(s)
      Masaru Ikehata
    • Journal Title

      Journal of Inverse and Ill-posed Problems

      Volume: - Issue: 0

    • DOI

      10.1515/jiip-2020-0082

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] On finding a penetrable obstacle using a single electromagnetic wave in the time domain2023

    • Author(s)
      Masaru Ikehata
    • Journal Title

      Journal of Inverse and Ill-posed Problems

      Volume: - Issue: 0

    • DOI

      10.1515/jiip-2020-0150

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The enclosure method for the detection of variable order in fractional diffusion equations2023

    • Author(s)
      Masaru Ikehata, Yavar Kian
    • Journal Title

      Inverse Problems and Imaging

      Volume: 17 Issue: 1 Pages: 180-202

    • DOI

      10.3934/ipi.2022036

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Pattern Formation in 2D Stochastic Anisotropic Swift–Hohenberg Equation2023

    • Author(s)
      FUKUIZUMI Reika、GAO Yueyuan、SCHNEIDER Guido、TAKAHASHI Motomitsu
    • Journal Title

      Interdisciplinary Information Sciences

      Volume: 29 Issue: 1 Pages: 81-98

    • DOI

      10.4036/iis.2023.A.03

    • ISSN
      1340-9050, 1347-6157
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Stationary martingale solution for the 2d stochastic Gross-Pitaevskii equation2023

    • Author(s)
      de Bouard Anne, Debussche Arnaud, Fukuizumi Reika
    • Journal Title

      RIMS講究録別冊

      Volume: 印刷中

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] A characterization of a hyperplane in two-phase heat conductors2023

    • Author(s)
      Cavallina Lorenzo, Sakaguchi Shigeru, Udagawa Seiichi
    • Journal Title

      Communications in Analysis and Geometry

      Volume: 印刷中

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Patterns with prescribed numbers of critical points on topological tori2022

    • Author(s)
      Kamalia Putri Zahra, Sakaguchi Shigeru
    • Journal Title

      Complex Variables and Elliptic Equations

      Volume: 67 Issue: 10 Pages: 2382-2396

    • DOI

      10.1080/17476933.2021.1924157

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The principal eigenfunction of the Dirichlet Laplacian with prescribed numbers of critical points on the upper half of a topological torus2022

    • Author(s)
      Kamalia Putri Zahra, Sakaguchi Shigeru
    • Journal Title

      Journal of Mathematical Analysis and Applications

      Volume: 509 Issue: 2 Pages: 125972-125972

    • DOI

      10.1016/j.jmaa.2021.125972

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Morse-Floer theory for superquadratic Dirac-geodesics2022

    • Author(s)
      Isobe Takeshi、Maalaoui Ali
    • Journal Title

      Calculus of Variations and Partial Differential Equations

      Volume: 61 Issue: 6 Pages: 204-204

    • DOI

      10.1007/s00526-022-02305-5

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Heat equation with an exponential nonlinear boundary condition in the half space2022

    • Author(s)
      G. Furioli, T. Kawakami, and E. Terraneo
    • Journal Title

      Partial Differ. Equ. Appl.

      Volume: 3 Issue: 3 Pages: 1-44

    • DOI

      10.1007/s42985-022-00170-7

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Existence of solutions to nonlinear parabolic equations via majorant integral kernel2022

    • Author(s)
      K. Ishige, T. Kawakami, and S. Okabe
    • Journal Title

      Nonlinear Anal

      Volume: 223 Pages: 113025-113025

    • DOI

      10.1016/j.na.2022.113025

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Revisiting the probe and enclosure methods2022

    • Author(s)
      Masaru Ikehata
    • Journal Title

      Inverse Problems

      Volume: 38 Issue: 7 Pages: 075009-075009

    • DOI

      10.1088/1361-6420/ac70f2

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Corrigendum: Non relativistic and ultra relativistic limits in 2D stochastic nonlinear damped Klein?Gordon equation (2022 Nonlinearity 35 2878)2022

    • Author(s)
      Fukuizumi Reika、Hoshino Masato、Inui Takahisa
    • Journal Title

      Nonlinearity

      Volume: 35 Issue: 10 Pages: C17-C19

    • DOI

      10.1088/1361-6544/ac8c7a

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Two-Dimensional Gross?Pitaevskii Equation With Space-Time White Noise2022

    • Author(s)
      de Bouard Anne、Debussche Arnaud、Fukuizumi Reika
    • Journal Title

      International Mathematics Research Notices

      Volume: / Issue: 12 Pages: 10556-10614

    • DOI

      10.1093/imrn/rnac137

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Non relativistic and ultra relativistic limits in 2D stochastic nonlinear damped Klein?Gordon equation2022

    • Author(s)
      Fukuizumi Reika、Hoshino Masato、Inui Takahisa
    • Journal Title

      Nonlinearity

      Volume: 35 Issue: 6 Pages: 2878-2919

    • DOI

      10.1088/1361-6544/ac64e0

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Interchanging Space and Time in Nonlinear Optics Modeling and Dispersion Management Models2022

    • Author(s)
      Fukuizumi Reika、Schneider Guido
    • Journal Title

      Journal of Nonlinear Science

      Volume: 32 Issue: 3

    • DOI

      10.1007/s00332-022-09788-8

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Large time behavior of temperature in two-phase heat conductors2021

    • Author(s)
      Kang Hyeonbae, Sakaguchi Shigeru
    • Journal Title

      Journal of Differential Equations

      Volume: 303 Pages: 268-276

    • DOI

      10.1016/j.jde.2021.09.027

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Polarization tensor vanishing structure of general shape: Existence for small perturbations of balls2021

    • Author(s)
      Kang Hyeonbae, Li Xiaofei, Sakaguchi Shigeru
    • Journal Title

      Asymptotic Analysis

      Volume: 125 Issue: 1-2 Pages: 101-132

    • DOI

      10.3233/asy-201651

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Neutral Inclusions, Weakly Neutral Inclusions, and an Over-determined Problem for Confocal Ellipsoids2021

    • Author(s)
      Ji Yong-Gwan, Kang Hyeonbae, Li Xiaofei, Sakaguchi Shigeru
    • Journal Title

      Springer INdAM Series

      Volume: 47 Pages: 151-181

    • DOI

      10.1007/978-3-030-73363-6_8

    • ISBN
      9783030733629, 9783030733636
    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Asymptotically linear Dirac-harmonic maps into flat tori2021

    • Author(s)
      Isobe Takeshi
    • Journal Title

      Differential Geometry and its Applications

      Volume: 75 Pages: 101716-101716

    • DOI

      10.1016/j.difgeo.2020.101716

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] On weak solutions to a fractional Hardy?H?non equation: Part I: Nonexistence2021

    • Author(s)
      Hasegawa Shoichi、Ikoma Norihisa、Kawakami Tatsuki
    • Journal Title

      Communications on Pure & Applied Analysis

      Volume: 0 Issue: 4 Pages: 1559-1600

    • DOI

      10.3934/cpaa.2021033

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Reconstruction of a source domain from the Cauchy data: II. Three-dimensional case2021

    • Author(s)
      Masaru Ikehata
    • Journal Title

      Inverse Problems

      Volume: 37 Issue: 12 Pages: 125004-125004

    • DOI

      10.1088/1361-6420/ac2fb9

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Stochastic Schr?dinger-Lohe model2021

    • Author(s)
      Fukuizumi Reika、Hahn Leo
    • Journal Title

      Journal of Functional Analysis

      Volume: 281 Issue: 10 Pages: 109224-109224

    • DOI

      10.1016/j.jfa.2021.109224

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] The Double Queen Dido’s Problem2020

    • Author(s)
      Cavallina Lorenzo、Henrot Antoine、Sakaguchi Shigeru
    • Journal Title

      The Journal of Geometric Analysis

      Volume: - Issue: 8 Pages: 7750-7772

    • DOI

      10.1007/s12220-020-00549-1

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Existence of weakly neutral coated inclusions of general shape in two dimensions2020

    • Author(s)
      Kang Hyeonbae, Li Xiaofei, Sakaguchi Shigeru
    • Journal Title

      Applicable Analysis

      Volume: 未定 Issue: 4 Pages: 1-24

    • DOI

      10.1080/00036811.2020.1781821

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Some characterizations of parallel hyperplanes in multi-layered heat conductors2020

    • Author(s)
      Sakaguchi Shigeru
    • Journal Title

      Journal de Mathematiques Pures et Appliquees

      Volume: 140 Pages: 185-210

    • DOI

      10.1016/j.matpur.2020.06.007

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A construction of patterns with many critical points on topological tori2020

    • Author(s)
      Kamalia Putri Zahra, Sakaguchi Shigeru
    • Journal Title

      Nonlinear Differential Equations and Applications NoDEA

      Volume: 27 Issue: 4

    • DOI

      10.1007/s00030-020-00643-x

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The large diffusion limit for the heat equation with a dynamical boundary condition2020

    • Author(s)
      M. Fila, K. Ishige and T. Kawakami
    • Journal Title

      Communications in Contemporary Mathematics

      Volume: to appear Issue: 01 Pages: 2050003-2050003

    • DOI

      10.1142/s0219199720500030

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Critical behavior for a semilinear parabolic equation with forcing term depending on time and space2020

    • Author(s)
      M. Jleli, T. Kawakami and B. Samet
    • Journal Title

      Journal of Mathematical Analysis and Applications

      Volume: to appear Issue: 2 Pages: 123931-123931

    • DOI

      10.1016/j.jmaa.2020.123931

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Upper bounds for higher-order Poincare constants2020

    • Author(s)
      Funano Kei, Sakurai Yohei
    • Journal Title

      Transactions of the American Mathematical Society

      Volume: 未定 Issue: 6 Pages: 1-1

    • DOI

      10.1090/tran/8049

    • NAID

      40022530922

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The enclosure method for the heat equation using time-reversal invariance for a wave equation2020

    • Author(s)
      Ikehata,M.
    • Journal Title

      J. Inverse Ill-Posed Probl.

      Volume: 28 Issue: 1 Pages: 93-104

    • DOI

      10.1515/jiip-2018-0103

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Morse homology for asymptotically linear Dirac equations on compact manifolds2020

    • Author(s)
      Takeshi Isobe
    • Journal Title

      Journal of Differential Equations

      Volume: - Issue: 6 Pages: 5062-5109

    • DOI

      10.1016/j.jde.2020.04.007

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Two-phase heat conductors with a surface of the constant flow property2019

    • Author(s)
      CAVALLINA Lorenzo, MAGNANINI Rolando, SAKAGUCHI Shigeru
    • Journal Title

      Journal of Geometric Analysis

      Volume: - Issue: 1 Pages: 312-345

    • DOI

      10.1007/s12220-019-00262-8

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] On finding a buried obstacle in a layered medium via the time domain enclosure method in the case of possible total reflection phenomena2019

    • Author(s)
      Ikehata, M., Kawashita, M. and Kawashita, W.
    • Journal Title

      Inverse Problems and Imaging

      Volume: 13 Issue: 5 Pages: 959-981

    • DOI

      10.3934/ipi.2019043

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Prescribing a heat flux coming from a wave equation2019

    • Author(s)
      Ikehata,M.
    • Journal Title

      J. Inverse Ill-Posed Probl.

      Volume: 27 Issue: 5 Pages: 731-744

    • DOI

      10.1515/jiip-2018-0031

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] On the multiple existence of superquadratic Dirac-harmonic maps into flat tori2019

    • Author(s)
      Takeshi isobe
    • Journal Title

      Calculus of Variations and Partial Differential Equations

      Volume: 58 Issue: 4

    • DOI

      10.1007/s00526-019-1578-0

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A nonlinear quantum walk induced by a quantum graph with nonlinear delta potentials2019

    • Author(s)
      Adami Riccardo、Fukuizumi Reika、Segawa Etsuo
    • Journal Title

      Quantum Information Processing

      Volume: 18 Issue: 4 Pages: 119-119

    • DOI

      10.1007/s11128-019-2215-8

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] A simple proof of a strong comparison principle for semicontinuous viscosity solutions of the prescribed mean curvature equation2019

    • Author(s)
      M. Ohnuma and S. Sakaguchi
    • Journal Title

      Nonlinear Analysis Theory, Methods & Applications

      Volume: 181 Pages: 180-188

    • DOI

      10.1016/j.na.2018.11.010

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Critical Fujita exponents for semilinear heat equations with quadratically decaying potential2019

    • Author(s)
      Kazuhiro Ishige and Tatsuki Kawakami
    • Journal Title

      Indiana Univ. Math. J.

      Volume: 印刷中

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Rate of convergence in the large diffusion limit for the heat equation with a dynamical boundary condition2019

    • Author(s)
      Marek Fila, Kazuhiro Ishige, Tatsuki Kawakami and Johannes Lankeit
    • Journal Title

      Asymptotic Anal.

      Volume: 印刷中

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Critical exponent for the global existence of solutions to a semilinear heat equation with degenerate coefficients2019

    • Author(s)
      Yohei Fujishima, Tatsuki Kawakami and Yannick Sire
    • Journal Title

      Calc. Var. Partial Differential Equations

      Volume: 印刷中 Issue: 2 Pages: 62-62

    • DOI

      10.1007/s00526-019-1525-0

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Concentration of eigenfunctions of the Laplacian on a closed Riemannian manifold2019

    • Author(s)
      Kei Funano and Yohei Sakurai
    • Journal Title

      Proceedings of the American Mathematical Society

      Volume: 不明 Issue: 7 Pages: 3155-3164

    • DOI

      10.1090/proc/14430

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Revealing cracks inside conductive bodies by electric surface measurements2019

    • Author(s)
      Hauptmann, A., Ikehata, M, Itou, H. and Siltanen, S.
    • Journal Title

      Inverse Problems

      Volume: 35 Issue: 2 Pages: 025004-025004

    • DOI

      10.1088/1361-6420/aaf273

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] The enclosure method for inverse obstacle scattering over a finite time interval:V. Using time-reversal invariance2019

    • Author(s)
      Ikehata, M.
    • Journal Title

      J. Inverse Ill-Posed Probl.

      Volume: 27 Issue: 1 Pages: 133-149

    • DOI

      10.1515/jiip-2018-0046

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] On finding the surface admittance of an obstacle via the time domain enclosure method2019

    • Author(s)
      Ikehata, M.
    • Journal Title

      Inverse Problems and Imaging

      Volume: 13 Issue: 2 Pages: 263-284

    • DOI

      10.3934/ipi.2019014

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Detecting a hidden obstacle via the time domain enclosure method. A scalar wave case2019

    • Author(s)
      Ikehata, M.
    • Journal Title

      Math Meth Appl Sci.

      Volume: 42 Issue: 5 Pages: 1413-1431

    • DOI

      10.1002/mma.5433

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] On finding a buried obstacle in a layered medium via the time domain enclosure method2018

    • Author(s)
      Ikehata, M. and Kawashita, M.
    • Journal Title

      Inverse Problems and Imaging

      Volume: 12 Issue: 5 Pages: 1173-1198

    • DOI

      10.3934/ipi.2018049

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] 優決定障害問題と領域の対称性2023

    • Author(s)
      Sakaguchi Shigeru
    • Organizer
      微分方程式における解の 漸近挙動の解析とその周辺, 広島大学理学部
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] A note on domain monotonicty for the Neumann eigenvalues of the Laplacian2023

    • Author(s)
      Funano Kei
    • Organizer
      2022年度日本数学会東北支部会
    • Related Report
      2021 Annual Research Report
  • [Presentation] A 'domain monotonicty' for Neumann eigenvalues of the Laplacian2023

    • Author(s)
      Funano Kei
    • Organizer
      Geometric Analysis in Harmonic Analysis and PDE, RIMS
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 時間領域における囲い込み法の展開2023

    • Author(s)
      Ikehata Masaru
    • Organizer
      2022年度第21回日本数学会解析学賞受賞特別講演
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] Smoluchowski-Kramers approximation in the stochastic nonlinear wave equation2023

    • Author(s)
      Fukuizumi Reika
    • Organizer
      RIMS 共同研究「Mathematical aspects of quantum fields and related topics」
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] ディリクレ第一固有関数が指定された個数の臨界点をもつ上半位相トー ラスの構成について2022

    • Author(s)
      Sakaguchi Shigeru
    • Organizer
      HMA セミナー・冬の研究会 2022
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 偏微分方程式の解の幾何学2022

    • Author(s)
      Sakaguchi Shigeru
    • Organizer
      最終講義, 東北大学純粋・応用数学研究 センター
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] Existence of solutions to nonlinear parabolic equations via majorant integral kernel2022

    • Author(s)
      Kawakami Tatsuki
    • Organizer
      Seminar on Qualitative Theory of Differential Equations
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 指数函数と逆問題2022

    • Author(s)
      Ikehata Masaru
    • Organizer
      公益社団法人日本技術士会中国本部2022年度建設部会例会・講演会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] The stochastic logarithmic diffusion equation in R^d with a multiplicative Stratonovich noise2022

    • Author(s)
      Fukuizumi Reika
    • Organizer
      RIMS共同研究 「発展方程式論の革新:異分野との融合がもたらす 理論の深化」
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] A stochastic effect in the quantum synchronization2022

    • Author(s)
      Fukuizumi Reika
    • Organizer
      Open Japanese-German conference on stochastic analysis
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Pattern formation in 2d stochastic anisotropic Swift-Hohenberg equation2022

    • Author(s)
      Fukuizumi Reika
    • Organizer
      RIMS共同研究「ランダム構造における確率論と解析学および関連する話題」
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Stochastic Gross-Pitaevskii equation2022

    • Author(s)
      Fukuizumi Reika
    • Organizer
      RIMS共同研究「Rigorous Statistical Mechanics and Related Topics」
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] Existence of solutions to nonlinear parabolic equations via majorant integral kernel2022

    • Author(s)
      Kawakami Tatsuki
    • Organizer
      HMAセミナー・冬の研究会2022
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 非整数階時間微分を含む移流拡散方程式について2022

    • Author(s)
      Kawakami Tatsuki
    • Organizer
      非線形現象の数値シミュレーションと解析2022
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 半空間における指数型非線形境界条件を有する熱方程式について2022

    • Author(s)
      Kawakami Tatsuki
    • Organizer
      北陸応用数理研究会2022
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] Statistical thermodynamics in the BEC model2022

    • Author(s)
      Fukuizumi Reika
    • Organizer
      NLPDE Spring セミナー 京都大学
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] Large time behavior of temperature in two-phase heat conductors2021

    • Author(s)
      Sakaguchi Shigeru
    • Organizer
      東 北大学応用数理解析セミナー
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 二相熱伝導体の温度の長時間挙動について2021

    • Author(s)
      Sakaguchi Shigeru
    • Organizer
      早稲田大学応用解析研究 会(第756回)
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] The large diffusion limit for the heat equation with a dynamical boundary condition2021

    • Author(s)
      Kawakami Tatsuki
    • Organizer
      BIRS-CMO Workshop "New Trends in Nonlinear Diffusion: a Bridge between PDEs, Analysis and Geometry"
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 時空間非斉次項を有する半線形拡散方程式の臨界指数2021

    • Author(s)
      Kawakami Tatsuki
    • Organizer
      第15回応用数理研究会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] Existence of solutions to nonlinear parabolic equations via majorant integral kernel2021

    • Author(s)
      Kawakami Tatsuki
    • Organizer
      鳥取PDE研究集会2021
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] Prescribing a heat flux coming from a wave equation2021

    • Author(s)
      Masaru Ikehata
    • Organizer
      The XIII international scientific conference and young scientist school ``Theory and Numerics of Inverse and Ill-posed Problems''
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] The time domain enclosure method for an inverse obstacle problem governed by the Maxwell system2021

    • Author(s)
      Masaru Ikehata
    • Organizer
      Mini-symposium “Inverse problems” organized by M.I. Belishev, DAYS on DIFFRACTION 2021
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] On finding a penetrable obstacle via the time domain enclosure method or the Maxwell system2021

    • Author(s)
      Masaru Ikehata
    • Organizer
      Eurasian Conference on Applied Mathematics-2021
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] On finding a penetrable obstacle via the time domain enclosure method for the Maxwell system2021

    • Author(s)
      Masaru Ikehata
    • Organizer
      RIMS Workshop“Theory and practice in inverse problems"
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Stochastic models arising in quantum phenomena2021

    • Author(s)
      Fukuizumi Reika
    • Organizer
      RIMS 共同研究(公開型) 調和解析と非線形偏微分方程式
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] Nonlinear Schrodinger equation: soliton, blow-up and noise2021

    • Author(s)
      Fukuizumi Reika
    • Organizer
      奈良女子大学 岡潔女性数学者セミナー
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 有限温度のボース・アインシュタイン凝縮を記述する確率微分方程式2021

    • Author(s)
      Fukuizumi Reika
    • Organizer
      東京工業大学量子物理学・ナノサイエンスセミナー第323回
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] BECモデルの理論数学による正当化と渦の解析2020

    • Author(s)
      Reika Fukuizumi
    • Organizer
      「BECにおける数学的側面」近畿大学
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] Stationary isothermic surfaces and surfaces with the constant flow property in multiphase conductors2019

    • Author(s)
      Shigeru Sakaguchi
    • Organizer
      2019 Workshop on the Isoparametric Theory, Beijing Normal University
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] A characterization of a hyperplane in two-phase heat conductors2019

    • Author(s)
      Shigeru Sakaguchi
    • Organizer
      Lorraine-Tohoku Workshop, Lorraine University
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] A characterization of a hyperplane in two-phase heat conductors2019

    • Author(s)
      Shigeru Sakaguchi
    • Organizer
      Colloquium, Central South University
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] The large diffusion limit for the heat equation with a dynamical boundary condition2019

    • Author(s)
      Tatsuki Kawakami
    • Organizer
      Italian-Japanese workshop on Geometric Properties for Parabolic and Elliptic PDE's, Cortona
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Critical Fujita exponents for semilinear heat equations with quadratically decaying potential2019

    • Author(s)
      Tatsuki Kawakami
    • Organizer
      Workshop on Nonlinear parabolic PDEs and related fields, The University of Tokyo
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Critical exponent for the global existence of solutions to a semilinear heat equation with degenerate coefficients2019

    • Author(s)
      Tatsuki Kawakami
    • Organizer
      The 44th Sapporo Symposium on Partial Differential Equations, Hokkaido University
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Critical exponent for the global existence of solutions to a semilinear heat equation with degenerate coefficients2019

    • Author(s)
      Tatsuki Kawakami
    • Organizer
      4th Swiss-Japanese PDE Seminar, I-site Namba
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Critical exponent for the global existence of solutions to a semilinear heat equation with degenerate coefficients2019

    • Author(s)
      Tatsuki Kawakami
    • Organizer
      New development in the theory of evolution equations: theory, phenomena and technology, RIMS
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Critical Fujita exponents for semilinear heat equations with quadratically decaying potential2019

    • Author(s)
      Tatsuki Kawakami
    • Organizer
      Nonlinear Analysis Workshop, Chinese academy of Science
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Critical exponent for the global existence of solutions to a semilinear heat equation with degenerate coefficients2019

    • Author(s)
      Tatsuki Kawakami
    • Organizer
      応用数理解析セミナー, 東北大学
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] Critical Fujita exponents for semilinear heat equations with quadratically decaying potential2019

    • Author(s)
      Tatsuki Kawakami
    • Organizer
      大阪大学微分方程式セミナー, 大阪大学
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] 動的境界条件を有する線形熱方程式の拡散極限2019

    • Author(s)
      Tatsuki Kawakami
    • Organizer
      基盤研究(S)キックオフシンポジウム 発展方程式における系統的計上解析および漸近解析, 東京大学
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] 動的境界条件を有する線形熱方程式の拡散極限2019

    • Author(s)
      Tatsuki Kawakami
    • Organizer
      数学と現象 : Mathematics and Phenomena in Miyazaki 2019, 宮崎大学
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] Upper bounds for higher order Poincare constants2019

    • Author(s)
      Kei Funano
    • Organizer
      Geometric aspects of solutions to partial differential equations, RIMS
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Upper bounds for higher order Poincare constants2019

    • Author(s)
      Kei Funano
    • Organizer
      Analysis and PDEs on Manifolds and Fractals, Nankai university
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Upper bounds for higher order Poincare constants2019

    • Author(s)
      Kei Funano
    • Organizer
      Tohoku-Lorraine Conference 2019, Lorraine university
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Upper bounds for higher order Poincare constants2019

    • Author(s)
      Kei Funano
    • Organizer
      福岡大学微分幾何セミナー, 福岡大学
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] Upper bounds for higher order Poincare constants2019

    • Author(s)
      Kei Funano
    • Organizer
      慶応義塾大学セミナー, 慶応義塾大学
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] On finding a cavity in a thermoelastic body using a single displacement measurement over a finite time interval on the surface of the body2019

    • Author(s)
      Masaru Ikehata
    • Organizer
      9th International Congress on Industrial and Applied Mathematics, Valencia
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Perturbed Dirac-harmonic maps into flat tori2019

    • Author(s)
      Takeshi Isobe
    • Organizer
      放物型・楕円型偏微分方程式研究集会
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] Temperature effects in the model of superfluidity2019

    • Author(s)
      Reika Fukuizumi
    • Organizer
      確率解析とその周辺, 東北大学
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Gibbs equilibrium for Gross-Pitaevskii equation2019

    • Author(s)
      Reika Fukuizumi
    • Organizer
      Lorraine-Tohoku Workshop, Lorraine University
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Gibbs equilibrium for Gross-Pitaevskii equation2019

    • Author(s)
      Reika Fukuizumi
    • Organizer
      Quantum and Kinetic Problems: Modeling, Analysis, Numerics and Applications. Workshop 1: Recent Progress and Challenge in Quantum and Kinetic Problems, NUS, Singapore
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Stochastic damped nonlinear wave equation: a model of finite temperature superconductivity2019

    • Author(s)
      Reika Fukuizumi
    • Organizer
      Workshop on nonlinear PDE in Numazu
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] BEC model with a trapping potential varying randomly in time- a review2019

    • Author(s)
      Reika Fukuizumi
    • Organizer
      Scientific Computing Across Scales: Quantum Systems in Cold-matter Physics and Chemistry, Fields Institute, Toronto
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 多層熱伝導体内の不変等温面による平行超平面の特徴付け2019

    • Author(s)
      坂口茂
    • Organizer
      日本数学会年会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Critical Fujita exponents for semilinear heat equations with quadratically decaying potential2019

    • Author(s)
      川上竜樹
    • Organizer
      九州大学関数方程式セミナー
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] 動的境界条件付き熱方程式の拡散極限2019

    • Author(s)
      川上竜樹
    • Organizer
      武蔵野大学・龍谷大学連携シンポジウム
    • Related Report
      2018 Annual Research Report
  • [Presentation] Recent developments of the time domain enclosure method for the Maxwell system2019

    • Author(s)
      Masaru Ikehata
    • Organizer
      RIMS Workshop on Inverse problems for partial differential equations and related areas
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Stationary isothermic surfaces and surfaces with the constant flow property2018

    • Author(s)
      Shigeru Sakaguchi
    • Organizer
      The tenth meeting on Probability and PDE
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Geometry of stationary isothermic surfaces and surfaces with the constant flow property2018

    • Author(s)
      Shigeru Sakaguchi
    • Organizer
      Inverse Problems for Partial Differential Equations In honor of Professor Masaru Ikehata on the occasion of his 60th Birthday
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Geometry of stationary isothermic surfaces and surfaces with the constant flow property2018

    • Author(s)
      坂口茂
    • Organizer
      熊本大学応用解析セミナー
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] 多層熱伝導体内の不変等温面による平行超平面の特徴付け2018

    • Author(s)
      坂口茂
    • Organizer
      早稲田大学応用解析研究会(第684回)
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] A semilinear elliptic equation with a dynamical boundary condition2018

    • Author(s)
      Tatsuki Kawakami
    • Organizer
      1138th AMS Meeting, Special Session on Partuial Differential Equations and New Perspective of Variational Methods
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Critical Fujita exponents for semilinear heat equations with quadratically decaying potential2018

    • Author(s)
      Tatsuki Kawakami
    • Organizer
      UK-Japan Workshop on Analysis of Nonlinear Partial Differential Equations
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] The large diffusion limit for the heat equation with a dynamical boundary condition2018

    • Author(s)
      Tatsuki Kawakami
    • Organizer
      8th Euro-Japanses Workshop On Blow-up
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Positive solutions of a semilinear elliptic equation with singular Dirichlet boundary data2018

    • Author(s)
      Tatsuki Kawakami
    • Organizer
      12th AIMS International Conference on Dyn. Systems, Diff. Equations and Applications
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Heat equation with a dynamical boundary condition2018

    • Author(s)
      Tatsuki Kawakami
    • Organizer
      12th AIMS International Conference on Dyn. Systems, Diff. Equations and Applications
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Critical Fujita exponents for semilinear heat equations with quadratically decaying potential2018

    • Author(s)
      川上竜樹
    • Organizer
      京都大学NLPDEセミナー
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] 動的境界条件付き半線形楕円型方程式2018

    • Author(s)
      川上竜樹
    • Organizer
      日本数学会2018年度秋季総合分科会
    • Related Report
      2018 Annual Research Report
  • [Presentation] ラプラシアンの固有関数の値の分布について2018

    • Author(s)
      船野敬
    • Organizer
      福岡大学微分幾何セミナー
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] 固有値の領域単調性・非単調性について2018

    • Author(s)
      船野敬
    • Organizer
      スペクトラルグラフ理論および周辺領域
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] Recent topics on the time domain enclosure method2018

    • Author(s)
      Masaru Ikehata
    • Organizer
      Inverse problems for partial differential equations in honor of Professor Masaru Ikehata on the occasion of his 60th birthday
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Remarks] researchmap

    • URL

      https://researchmap.jp/sigersak2012415/

    • Related Report
      2021 Annual Research Report 2020 Annual Research Report 2019 Annual Research Report
  • [Remarks] researchmap

    • URL

      http://researchmap.jp/sigersak2012415/

    • Related Report
      2018 Annual Research Report
  • [Funded Workshop] Geometry and Analysis Seminar -- Mini Workshop 20232023

    • Related Report
      2021 Annual Research Report
  • [Funded Workshop] 16th Aoba-yama PDE Seminar “Reaction-Diffusion Equations”2022

    • Related Report
      2021 Annual Research Report
  • [Funded Workshop] RACMaS Lectures "Applied Mathematics and PDEs, Part I"2018

    • Related Report
      2018 Annual Research Report
  • [Funded Workshop] Joint Firenze-Tohoku Research Workshop on Nonlinear PDEs2018

    • Related Report
      2018 Annual Research Report

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Published: 2018-04-23   Modified: 2024-01-30  

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