Kokubu Masatoshi 國分雅敏

… Alternative Names

KOKUBU Masatoshi 國分雅敏

国分雅敏コクブマサトシ

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Researcher Number	50287439
Other IDs	https://orcid.org/0000-0001-7750-6390
External Links
Affiliation (Current)	2025: 東京電機大学, 工学部, 教授
Affiliation (based on the past Project Information) *help	2017 – 2023: 東京電機大学, 工学部, 教授 2008 – 2014: Tokyo Denki University, 工学部, 教授 2007 – 2008: Tokyo Denki University, Department of Mathematical Sciences, Associate Professor 2001 – 2006: 東京電機大学, 工学部, 助教授 2004: 東京電気大学, 工学部, 助教授 2001: 東京電気大学, 工学部, 講師 1999 – 2001: 東京電機大学, 工学部, 講師
Review Section/Research Field	Principal Investigator Geometry / Geometry / Basic Section 11020:Geometry-related Except Principal Investigator Geometry / Geometry / Global analysis
Keywords	Principal Investigator 平均曲率 / 特異点 / 微分幾何 / 曲面 / 正則性 / 幾何学 / ガウス曲率 / 曲率 / 可積分系 / 双曲型空間 … More / 微分幾何学 / 対称性 / 波面 / 平坦 / 解析的拡張 / 広義の正則性 / 広義正則曲面 / 極小曲面 / 曲面論 … More Except Principal Investigator 特異点 / 曲面 / ガウス曲率 / integral geometry / Croftonの公式 / 積分幾何学 / 双曲型空間 / ガウス写像 / 変曲点 / 極大曲面 / 波面 / 平均曲率 / 弱鏡映部分多様体 / Poincareの公式 / 交叉積分公式 / 変分問題 / 等質空間 / Gaussian curvature / 平均曲率一定曲面 / 可積分系 / hyperbolic space / 曲線 / 微分幾何学 / ガウス・ボンネの定理 / constant mean curvature / 極小曲面 / 双対性 / 特異点の微分幾何 / フロント / ワイエルストラス表現 / 微分幾何 / multiple Kaehler angle / kinematic formula / Riemannian symmetric pair / austere orbit / weakly reflective orbit / austere部分多様体 / 鏡映部分多様体 / Riemann対称空間 / Riemann等質空間 / 多重ケーラー角度 / Riemann対称対 / austere軌道 / 弱鏡映軌道 / reflective submanifold / Crofton formula / Poincare formula / differential geometry / homogeneous space / Wave front / Inflection point / Singular point / 平坦 / 3-dimensional spherical space / Euclidean space / integrable systems / 平坦曲面 / 双曲空間 / 3次元球面 / ユークリッド空間 / variational problems / homogeneous spaces / Kahler角度 / Gauss map / Mean curvature / Hyperbolic space / DELAUNAY SURFACE / FREE BOUNDARY PROBLEM / SECOND VARIATION FORMULA / STABILITY OF MINIMAL SURFACE / STABILITY OF CONSTANT MEAN CURVATURE SURFACE / MINIMAL SURFACE / CONSTANT MEAN CURVATURE SURFACE / ガラス写像 / Weierstrass公式 / 第2変分公式 / Delaunay曲面 / 自由境界問題 / 第二変分公式 / 極小曲面の安定性 / 平均曲率一定曲面の安定性 / Integrable system / Yang-Mills-Higgs equation / Moduli space / Symmetric space / Harmonic map / Yang-Mills-Higgs方程式 / モジュライ空間 / 対称空間 / 調和写像 / Total curvature / Surface / Mean Curvature / 全曲率 / 4頂点定理 / ４頂点定理 / 超曲面 / 半正定値計量 / comnplet / conformally flat / duality / Gauss-Bonnet formula / front bundles / coherent tangent bundles / wave fronts / 超幾何微分方程式 / 3ノイド / 共形平坦計量 / 双曲計量 / CMC-1 曲面 / 双曲空間の平坦波面 / カスプ辺 / 交叉帽子 / 連接接束 / 特異曲率 / spacelike surface / flat surface / Minkowski 3-space / de Sitter 3-space / hyperbolic 3-space / Euclidean 3-space / spacelike surfaces / non-positive definite spaceforms / Weierstrass type representations / 3-dimensional space forms / linear Weingarten surfaces / flat surfaces / constant mean curvature surfaces / Riemannian connections / conserved quantities / Lorentz spaceforms / Lie sphere geometry / Moebius geometry / 3-dimensional spaceforms / Omega surfaces / linear Weingarten曲面 / discrete differential geometry / asymptotics of surfaces / surface theory / 特異点に微分幾何 / ド・ジッター空間のCMC1曲面 / 双曲空間の平坦曲面 / ワイエルストラス型表現公式 Less

広義正則曲面の微分幾何に関する体系的研究Principal Investigator
- Principal Investigator
  
  國分雅敏
- Project Period (FY)
  2020 – 2024
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Review Section
  
  Basic Section 11020:Geometry-related
- Research Institution
  Tokyo Denki University
Differential geometric research of regular surfaces in a wider sensePrincipal Investigator
- Principal Investigator
  
  KOKUBU Masatoshi
- Project Period (FY)
  2017 – 2019
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  Tokyo Denki University
Geometry of curves, surfaces and hypersurfaces with singularities
- Principal Investigator
  
  UMEHARA Masaaki
- Project Period (FY)
  2010 – 2014
- Research Category
  
  Grant-in-Aid for Scientific Research (A)
- Research Field
  
  Geometry
- Research Institution
  Tokyo Institute of Technology
  Osaka University
Differential geometric research on surfaces admitting singularities and its applicationPrincipal Investigator
- Principal Investigator
  
  KOKUBU Masatoshi
- Project Period (FY)
  2010 – 2014
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  Tokyo Denki University
Weierstrass-type representation formulas and their application to surfaces with singularities
- Principal Investigator
  
  YAMADA Kotaro
- Project Period (FY)
  2009 – 2013
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Research Field
  
  Geometry
- Research Institution
  Tokyo Institute of Technology
Asymptotic behavior of surfaces with special properties via transformation theory and conserved quantities and integrable systems techniques
- Principal Investigator
  
  W.F Rossma (W.F Rossman)
- Project Period (FY)
  2008 – 2011
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Research Field
  
  Geometry
- Research Institution
  Kobe University
Geometry of curves and surfaces with singularities
- Principal Investigator
  
  UMEHARA Masaaki
- Project Period (FY)
  2007 – 2010
- Research Category
  
  Grant-in-Aid for Scientific Research (A)
- Research Field
  
  Geometry
- Research Institution
  Osaka University
Generalizations of Weierstrass-type representation formula and their applications to theory of surface with singularities
- Principal Investigator
  
  YAMADA Kotaro (KOTARO Yamada)
- Project Period (FY)
  2006 – 2008
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Research Field
  
  Geometry
- Research Institution
  Kyushu University
Differential geometric researches on surfaces in a space of constant curvature and their singularitiesPrincipal Investigator
- Principal Investigator
  
  KOKUBU Masatoshi
- Project Period (FY)
  2006 – 2009
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  Tokyo Denki University
Integral geometry in homogeneous spaces and its applications
- Principal Investigator
  
  TASAKI Hiroyuki
- Project Period (FY)
  2006 – 2007
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  University of Tsukuba
Integral geometry and variational problems in homogeneous spaces
- Principal Investigator
  
  TASAKI Hiroyuki
- Project Period (FY)
  2004 – 2005
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  University of Tsukuba
Application of integrable systems methods to surfaces with particular variational properties
- Principal Investigator
  
  ROSSMAM W.F.
- Project Period (FY)
  2003 – 2006
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Research Field
  
  Geometry
- Research Institution
  Kobe University
The global behavior of curves and surfaces in space forms
- Principal Investigator
  
  UMEHARA Masaaki
- Project Period (FY)
  2003 – 2006
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Research Field
  
  Geometry
- Research Institution
  Osaka University
Homogeneous spaces and variational problems
- Principal Investigator
  
  TASAKI Hiroyuki
- Project Period (FY)
  2002 – 2003
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  University of Tsukuba
可積分系理論の応用による双曲型空間の曲面論の研究Principal Investigator
- Principal Investigator
  
  國分雅敏
- Project Period (FY)
  2001 – 2002
- Research Category
  
  Grant-in-Aid for Young Scientists (B)
- Research Field
  
  Geometry
- Research Institution
  Tokyo Denki University
Research on surfaces of constant mean curvature one in hyperbolic space and its application
- Principal Investigator
  
  UMEHARA Masaaki
- Project Period (FY)
  2001 – 2002
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  HIROSHIMA UNIVERSITY
曲面論への可積分系理論の応用に関する研究Principal Investigator
- Principal Investigator
  
  國分雅敏
- Project Period (FY)
  1999 – 2000
- Research Category
  
  Grant-in-Aid for Encouragement of Young Scientists (A)
- Research Field
  
  Geometry
- Research Institution
  Tokyo Denki University
Geometry of surfaces in space forms
- Principal Investigator
  
  UMEHARA Masaaki
- Project Period (FY)
  1999 – 2000
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  Hiroshima University
HARMONIC MAPS INTO SYMMETRIC SPACES AND GEOMETRY OF MODULI SPACES
- Principal Investigator
  
  OHNITA Yoshihiro
- Project Period (FY)
  1999 – 2000
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  Tokyo Metropolitan University
DEFORMATION AND STABILITY OF SURFACES WITH CONSTANT MEAN CURVATURE
- Principal Investigator
  
  KOISO Miyuki
- Project Period (FY)
  1999 – 2000
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Global analysis
- Research Institution
  KYOTO UNIVERSITY OF EDUCATION

All 2024 2022 2020 2018 2017 2014 2013 2011 2010 2009 2008 2007 2005 2004 Other

All Journal Article Presentation

[Journal Article] Surfaces with concentric or parallel K-contours2024
- Author(s)
  Shoichi Fujimori, Yu Kawakami, Masatoshi Kokubu
- Journal Title
  
  Journal of Geometry
  
  Volume: 115 Issue: 2
- DOI
  10.1007/s00022-024-00719-4
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20K03617
[Journal Article] Flat fronts with polyhedral symmetry in hyperbolic three-space2022
- Author(s)
  Masatoshi Kokubu
- Journal Title
  
  Journal of Geometry
  
  Volume: 113 Issue: 1
- DOI
  10.1007/s00022-022-00633-7
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20K03617
[Journal Article] Analytic extensions of constant mean curvature one geometric catenoids in de Sitter 3-space2022
- Author(s)
  Shoichi Fujimori, Yu Kawakami, Masatoshi Kokubu, Wayne Rossman, Masaaki Umehara, Kotaro Yamada and Seong-Deog Yang
- Journal Title
  
  Differential Geometry and Its Applications
  
  Volume: 84 Pages: 101924-101924
- DOI
  10.1016/j.difgeo.2022.101924
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20K03617, KAKENHI-PROJECT-21K03226, KAKENHI-PROJECT-22H00094, KAKENHI-PROJECT-19K03463, KAKENHI-PROJECT-17H02839, KAKENHI-PROJECT-23K20794, KAKENHI-PROJECT-23K22392
[Journal Article] Analytic extension of exceptional constant mean curvature one catenoids in de Sitter 3-space2020
- Author(s)
  Shoichi Fujimori, Yu Kawakami, Masatoshi Kokubu, Wayne Rossman, Masaaki Umehara and Kotaro Yamada
- Journal Title
  
  Mathematical Journal of Okayama University
  
  Volume: 62
- NAID
  120006778830
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-17K05227
[Journal Article] Addendum: Singularities of flat fronts in hyperbolic space2018
- Author(s)
  Kokubu Masatoshi、Rossman Wayne、Saji Kentaro、Umehara Masaaki、Yamada Kotaro
- Journal Title
  
  Pacific Journal of Mathematics
  
  Volume: 294 Issue: 2 Pages: 505-509
- DOI
  10.2140/pjm.2018.294.505
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-17K05227, KAKENHI-PROJECT-17H06127, KAKENHI-PROJECT-26400087
[Journal Article] Mixed type surfaces with bounded mean curvature in 3-dimensional space-times2017
- Author(s)
  A. Honda, M. Koiso, M. Kokubu, M. Umehara and Kotaro Yamada
- Journal Title
  
  Diff. Geom. and its Appl.
  
  Volume: 52 Pages: 64-77
- DOI
  10.1016/j.difgeo.2017.03.009
- Peer Reviewed / Acknowledgement Compliant / Open Access
- Data Source
  KAKENHI-PROJECT-26247005, KAKENHI-PROJECT-25287012, KAKENHI-PROJECT-26520205, KAKENHI-PROJECT-26610016, KAKENHI-PROJECT-26400066, KAKENHI-PROJECT-17K05227, KAKENHI-PROJECT-16K17605
[Journal Article] Analytic extension of Jorge-Meeks type maximal surfaces in Lorentz-Minkowski 3-space2017
- Author(s)
  Shoichi Fujimori, Yu Kawakami, Masatoshi Kokubu, Wayne Rossman, Masaaki Umehara and Kotaro Yamada
- Journal Title
  
  Osaka Journal of Mathematics
  
  Volume: 54 Pages: 249-272
- NAID
  120006312701
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-17K05227
[Journal Article] Quadrics and Scherk towers2017
- Author(s)
  Fujimori S.、Hertrich-Jeromin U.、Kokubu M.、Umehara M.、Yamada K.
- Journal Title
  
  Monatshefte f?r Mathematik
  
  Volume: - Issue: 2 Pages: 249-279
- DOI
  10.1007/s00605-017-1075-5
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17K05227, KAKENHI-PROJECT-26247005, KAKENHI-PROJECT-17K05219, KAKENHI-PROJECT-16H03937, KAKENHI-PROJECT-17H02839
[Journal Article] Visualization of Tangent Developables on a Volumetric Display2014
- Author(s)
  Ou Yamamoto and Masatoshi Kokubu
- Journal Title
  
  Joint Proceedings of the MathUI, OpenMath and ThEdu Workshops and Work in Progress track at Conferences on Intelligent Computer Mathematics (CICM 2014), ONLINE: http://ceur-ws.org/Vol-1186/
  
  Volume: 1186
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-22540100
[Journal Article] Hyperbolic metrics on Riemann surfaces and space-like CMC-1 Surfaces in de Sitter 3-Space in "Recent Trends in Lorentzian Geometry"2013
- Author(s)
  Shoichi Fujimori, Yu Kawakami, Masatoshi Kokubu, Wayne Rossman, Masaaki Umehara and Kotaro Yamada
- Journal Title
  
  Springer Proceedings in Mathematics & Statistics
  
  Volume: 26 Pages: 1-47
- DOI
  10.1007/978-1-4614-4897-6_1
- ISBN
  9781461448969, 9781461448976
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21340016, KAKENHI-PROJECT-21740052, KAKENHI-PROJECT-22540100, KAKENHI-PROJECT-23540091, KAKENHI-PROJECT-24740044
[Journal Article] Orientability of linear Weingarten surfaces, spacelike CMC-1 surfaces and maximal surfaces2011
- Author(s)
  M.Kokubu and M.Umehara
- Journal Title
  
  Math. Nachr.
  
  Volume: 284 Issue: 14-15 Pages: 1903-1918
- DOI
  10.1002/mana.200910176
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20244005, KAKENHI-PROJECT-22244006, KAKENHI-PROJECT-22540100
[Journal Article] CMC-1 trinoids in H3 and metrics of constant curvature one with conical singularities on S22011
- Author(s)
  Shoichi Fujimori, Yu Kawakami, Masatoshi Kokubu, Wayne Rossman, Masaaki Umehara and Kotaro Yamada
- Journal Title
  
  Proceedings of Japan Academy
  
  Volume: vol.87,Ser.A Pages: 144-149
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21340016
[Journal Article] CMC-1 trinoids in H^3 and metrics of constant curvature one…2011
- Author(s)
  S.Fujimori, K.Yamada, et.al.
- Journal Title
  
  Proceedings of Japan Academy, Ser.A.
  
  Volume: 87 Issue: 8 Pages: 144-149
- DOI
  10.3792/pjaa.87.144
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21340016, KAKENHI-PROJECT-21740052, KAKENHI-PROJECT-21740053, KAKENHI-PROJECT-22244006, KAKENHI-PROJECT-22540100
[Journal Article] CMC-1 trinoids in hyperbolic 3-space and metrics of constant curvature one with conical singularities on the 2-sphere2011
- Author(s)
  S. Fujimori, Y. Kawakami, M. Kokubu, W. Rossman, M. Umehara and K. Yamada
- Journal Title
  
  Proc. Japan Acad.
  
  Volume: 87 Pages: 144-149
- NAID
  40019127816
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20340012
[Journal Article] On horospherical linear weingarten surfaces in hyperbolic 3-space2010
- Author(s)
  國分雅敏
- Journal Title
  
  数理解析研究所講究録
  
  Volume: 1707 Pages: 111-124
- Data Source
  KAKENHI-PROJECT-22540100
[Journal Article] 3次元双曲型空間における平坦曲面のエンドの漸近挙動2009
- Author(s)
  國分雅敏
- Journal Title
  
  京都大学数理解析研究所講究録 1623
  
  Pages: 62-75
- Data Source
  KAKENHI-PROJECT-18540096
[Journal Article] Surfaces and fronts with harmonic-mean curvature one in hyperbolic 3-space2009
- Author(s)
  Masatoshi Kokubu
- Journal Title
  
  Tokyo Journal of Mathematics 32
  
  Pages: 177-200
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18540096
[Journal Article] Surfaces and fronts with harmonic-mean curvature one in hyperbolic three-space2009
- Author(s)
  Masatoshi Kokubu
- Journal Title
  
  Tokyo Journal of Mathematics 32
  
  Pages: 177-200
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18540096
[Journal Article] 3次元双曲型空間における平坦曲面のエンドの漸近挙動2009
- Author(s)
  國分雅敏
- Journal Title
  
  数理解析研究所講究録 1623
- Data Source
  KAKENHI-PROJECT-18540096
[Journal Article] Asymptotic behavior of flat surfaces in hyperbolic 3-space2009
- Author(s)
  Masatoshi Kokubu, Wayne Rossman, Masaaki Umehara, Kotaro Yamada
- Journal Title
  
  Journal of the Mathematical Society of Japan 61
  
  Pages: 799-852
- NAID
  10026998469
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18540096
[Journal Article] Asymptotic behavior of flat surfaces in hyperbolic 3-space2009
- Author(s)
  M.Kokubu, W.Rossman, M.Umehara, K.Yamada
- Journal Title
  
  J.Math.Soc.Japan 61(3)
  
  Pages: 799-852
- NAID
  10026998469
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20340012
[Journal Article] Asymptotic behavior of flat surface in hyperbolic 3-space2009
- Author(s)
  M.Kokubu, W.Rossman, M.Umehara, K.Yamada
- Journal Title
  
  Journal of the Mathematical Society of Japan 61
  
  Pages: 799-852
- NAID
  10026998469
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21340016
[Journal Article] Flat fronts in hyperbolic 3-space and their caustics2007
- Author(s)
  Kokubu, Masatoshi ; Rossman, Wayne ; Umehara, Massaki ; Yamada, Kotaro
- Journal Title
  
  Journal of Mathematical Society of Japan 59
  
  Pages: 265-299
- NAID
  10019540696
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-18540065
[Journal Article] 3次元双曲型空間の線形Weingarten曲面について2007
- Author(s)
  國分雅敏
- Journal Title
  
  京都大学数理解析研究所講究録 1527
  
  Pages: 49-66
- Data Source
  KAKENHI-PROJECT-18540096
[Journal Article] On flat fronts in hyperbolic 3-space2007
- Author(s)
  Masatoshi Kokubu
- Journal Title
  
  Oberwolfach Report 24
  
  Pages: 1337-1340
- Data Source
  KAKENHI-PROJECT-18540096
[Journal Article] 3次元双曲型空間の線形Weingarten曲面について2007
- Author(s)
  國分雅敏
- Journal Title
  
  京都大学数理解析研究所講究録 No.1527
  
  Pages: 49-66
- Data Source
  KAKENHI-PROJECT-18540096
[Journal Article] Flat fronts in hyperbolic 3-space and their caustics2007
- Author(s)
  Kokubu, Masatoshi; Rossman, Wayne; Umehara, Masaaki; Yamada, Kotaro
- Journal Title
  
  J. Math. Soc. Japan 59
  
  Pages: 265-299
- NAID
  10019540696
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18540065
[Journal Article] Flat fronts in hyperbolic 3-space and their caustics2007
- Author(s)
  M.Kokubu, W.Rossman, M.Umehara, K.Yamada
- Journal Title
  
  J. Math. Soc. Japan 59
  
  Pages: 265-299
- NAID
  10019540696
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-15340024
[Journal Article] Flat fronts in hyperbolic 3 - space and their caustics2007
- Author(s)
  Kokubu, Masatoshi・Rossman, Wayne・Umehara, Masaaki・Yam ada, Kotaro
- Journal Title
  
  Journal of Mathernatical Society of Japan 59
  
  Pages: 265-299
- NAID
  10019540696
- Description
  「研究成果報告書概要(和文)」より
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18540065
[Journal Article] Flat fronts in hyperbolic 3-space and their caustics2007
- Author(s)
  M. Kokubu, M. Umehara, K. Yamada
- Journal Title
  
  Journal of Mathematical Society of Japan vol.59(1)
  
  Pages: 265-299
- NAID
  10019540696
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18340019
[Journal Article] Flat fronts in hyperbolic 3-space and their caustics2007
- Author(s)
  M.Kokubu, M.Umehara, K.Yamada
- Journal Title
  
  J. Math. Soc. Japan 59
  
  Pages: 265-299
- NAID
  10019540696
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-15340023
[Journal Article] Flat fronts in hyperbolic 3-space and their caustics2007
- Author(s)
  Masatoshi Kokubu
- Journal Title
  
  Journal of Mathematical Society of Japan 59・1
  
  Pages: 265-299
- NAID
  10019540696
- Data Source
  KAKENHI-PROJECT-18540065
[Journal Article] Flat fronts in hyperbdic 3-space and their caustics2007
- Author(s)
  Masatoshi KOKUBU, Kotaro YAMADA et al.
- Journal Title
  
  Hournal of the Mathematical Society of Japan 59.1
  
  Pages: 265-299
- Data Source
  KAKENHI-PROJECT-18340019
[Journal Article] Flat fronts in hyperbolic 3-space and their caustics2007
- Author(s)
  M. Kokubu, W. Rossman, M. Umehara and K. Yamada
- Journal Title
  
  Journal of the Mathematical Society of Japan 265--299
  
  Pages: 59-59
- NAID
  10019540696
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19204005
[Journal Article] Flat fronts in hyperbolic 3-space and their caustics2007
- Author(s)
  M.Kokubu, et al.
- Journal Title
  
  J.Math.Soc.Japan 59
  
  Pages: 265-299
- NAID
  10019540696
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-15340024
[Journal Article] Flat fronts in hyperbolic 3-space and their caustics2007
- Author(s)
  M.Kokubu , W. Rossman, M. Umehara and K. Yamada
- Journal Title
  
  J. of Math. Soc. Japan 50
  
  Pages: 265-299
- NAID
  10019540696
- Data Source
  KAKENHI-PROJECT-18340019
[Journal Article] Flat fronts in hyperbolic 3-space and their caustics2007
- Author(s)
  Masatoshi Kokubu, et. al.
- Journal Title
  
  Journal of the Mathematical Society of Japan 59
  
  Pages: 265-299
- NAID
  10019540696
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18340019
[Journal Article] Singularities of flat fronts in hyperbolic 3-space2005
- Author(s)
  M.Kokubu, et al.
- Journal Title
  
  Pacific J.Math. 221
  
  Pages: 303-351
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-15340024
[Journal Article] Singularities of flat fronts in hyperbolic 3-space2005
- Author(s)
  M.Kokubu, W.Rossman, M.Umehara, K.Yamada
- Journal Title
  
  Pacific J. Math. 221
  
  Pages: 303-351
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-15340024
[Journal Article] Singularites of flat fronts in hyperbolic 3-space2005
- Author(s)
  M.Kokubu, W.Rossmsan, K.Saji, M.Umehara, K.Yamada
- Journal Title
  
  Pacific J.Math. 221・(2)
  
  Pages: 303-351
- Data Source
  KAKENHI-PROJECT-15340024
[Journal Article] Flat fronts in hyperholic 3-space2004
- Author(s)
  M.Kokubu, et al.
- Journal Title
  
  Pacific Journal of Mathematics 216
  
  Pages: 149-175
- Data Source
  KAKENHI-PROJECT-15340024
[Journal Article] Flat fronts in hyperbolic 3-space2004
- Author(s)
  M.Kokubu, M.Umehara, K.Yamada
- Journal Title
  
  Pacific J. Math. 216
  
  Pages: 149-175
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-15340024
[Journal Article] Flat fronts in hyperbolic 3-space2004
- Author(s)
  M.Kokubu, et al.
- Journal Title
  
  Pacific J.Math. 216
  
  Pages: 149-175
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-15340024
[Journal Article] Flat fronts in hyperbolic 3-space2004
- Author(s)
  Kokubu, Umehara, Yamada
- Journal Title
  
  Pacific J.Math. 216・1
  
  Pages: 149-175
- Data Source
  KAKENHI-PROJECT-16540051
[Journal Article] Asymptotic behavior of flat surfaces in hyperbolic 3-space
- Author(s)
  Masatoshi Kokubu, Wayne Rossman, Masaaki Umehara, Kotaro Yamada
- Journal Title
  
  Journal of the Mathematical Society of Japan (掲載決定)
- NAID
  10026998469
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18540096
[Journal Article] Surfaces and fronts with harmonic-mean curvature one in hyperbolic three-space
- Author(s)
  Masatoshi Kokubu
- Journal Title
  
  Tokyo Journal of Mathematics (掲載決定)
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18540096
[Presentation] Flat fronts in hyperbolic three-space and related topics2022
- Author(s)
  國分雅敏
- Organizer
  日本数学会本会
- Invited
- Data Source
  KAKENHI-PROJECT-20K03617
[Presentation] On flat fronts with symmetry2022
- Author(s)
  Masatoshi Kokubu
- Organizer
  Workshop on Surface Theory --UY60--
- Invited
- Data Source
  KAKENHI-PROJECT-20K03617
[Presentation] R^3, R^3_1 の曲面に関する Kenmotsu 型公式の統一化と応用2018
- Author(s)
  國分　雅敏
- Organizer
  部分多様体論・湯沢2018
- Invited
- Data Source
  KAKENHI-PROJECT-17K05227
[Presentation] Kenmotsu-type formulas -- Unification and Application2017
- Author(s)
  Masatoshi Kokubu
- Organizer
  International Workshop on Differential Geometric Aspects of Integrable Systems
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17K05227
[Presentation] Bonnet 問題に関する一考察2013
- Author(s)
  國分雅敏
- Organizer
  山口幾何学研究集会2013「進展する曲面論 -- Advances in Surface Theory --」
- Place of Presentation
  山口大学理学部
- Invited
- Data Source
  KAKENHI-PROJECT-22540100
[Presentation] (Co)orientability of horospherical linear Weingarten fronts2011
- Author(s)
  Masatoshi Kokubu
- Organizer
  Spanish-Japanese Workshop on Differential Geometry
- Place of Presentation
  Granada University, Spain
- Year and Date
  2011-02-15
- Data Source
  KAKENHI-PROJECT-22540100
[Presentation] Linear Weingarten surfaces in hyperbolic 3-space2010
- Author(s)
  Masatoshi Kokubu
- Organizer
  10th International Workshop on Complex Structures, Integrability and Vector Fields
- Place of Presentation
  Bulgarian Academy of Sciences, Sofia, Bulgaria
- Year and Date
  2010-09-14
- Data Source
  KAKENHI-PROJECT-22540100
[Presentation] 3次元双曲型空間の線形Weingarten曲面について2009
- Author(s)
  國分雅敏
- Organizer
  研究集会 '部分多様体幾何とリー群作用'
- Place of Presentation
  東京理科大学森戸記念館
- Year and Date
  2009-09-07
- Data Source
  KAKENHI-PROJECT-18540096
[Presentation] Linear Weingarten surfaces in hyperbolic 3-space2009
- Author(s)
  Masatoshi Kokubu
- Organizer
  研究集会 'Differential Geometry with Mira'
- Place of Presentation
  大阪大学
- Year and Date
  2009-04-15
- Data Source
  KAKENHI-PROJECT-18540096
[Presentation] 3次元双曲型空間のホロ球面的線型ワインガルテン曲面について2009
- Author(s)
  國分雅敏
- Organizer
  数理解析研究所研究集会「写像の特異点とそれに関連する幾何学」
- Place of Presentation
  日本大学オーバルホール
- Year and Date
  2009-12-09
- Data Source
  KAKENHI-PROJECT-18540096
[Presentation] 曲面の微分幾何---計算から眺めるいくつかの話題---2009
- Author(s)
  國分雅敏
- Organizer
  研究集会'計算による数理科学の展開2009'
- Place of Presentation
  神戸大学
- Year and Date
  2009-01-09
- Data Source
  KAKENHI-PROJECT-18540096
[Presentation] 3次元双曲型空間のホロ球面的線型ワインガルテン曲面について2009
- Author(s)
  國分雅敏
- Organizer
  数理解析研究所研究集会 '写像の特異点論とそれに関連する幾何学'
- Place of Presentation
  日本大学オーバルホール
- Year and Date
  2009-12-09
- Data Source
  KAKENHI-PROJECT-18540096
[Presentation] 3次元双曲型空間における平坦曲面のエンドの漸近挙動2008
- Author(s)
  國分雅敏
- Organizer
  RIMS研究集会'部分多様体の微分幾何学およびその周辺領域の研究'
- Place of Presentation
  京都大学数理解析研究所
- Year and Date
  2008-06-24
- Data Source
  KAKENHI-PROJECT-18540096
[Presentation] 3次元双曲型空間における平坦曲面のエンドの漸近挙動2008
- Author(s)
  國分雅敏
- Organizer
  RIMS研究集会'部分多様体の微分幾何学およびその周辺領域の研究
- Place of Presentation
  京都大学数理解析研究所
- Year and Date
  2008-06-24
- Data Source
  KAKENHI-PROJECT-18540096
[Presentation] On differential geometric aspect of flat fronts in hyperbolic 3-space2008
- Author(s)
  Masatoshi Kokubu
- Organizer
  9th International Workshop on Complex Structures, Integrability and Vector Fields
- Place of Presentation
  Bulgarian Academy of Sciences, Sofia(ブルガリア)
- Year and Date
  2008-08-26
- Data Source
  KAKENHI-PROJECT-18540096
[Presentation] Asymptotic behavior of flat surfaces in H32008
- Author(s)
  Masatoshi Kokubu
- Organizer
  国際研究集会'Integrable systems, Geometry and Visualization
- Place of Presentation
  九州大学箱崎地区・福岡大学
- Year and Date
  2008-12-12
- Data Source
  KAKENHI-PROJECT-18540096
[Presentation] On differential geometric aspect of flat fronts in hyperbolic 3-space2008
- Author(s)
  Masatoshi Kokubu
- Organizer
  9th International Workshop on Complex Structures, Integrability and Vector Fields
- Place of Presentation
  Bulgarian Academy of Sciences, Sofia, Bulgaria
- Year and Date
  2008-08-26
- Data Source
  KAKENHI-PROJECT-18540096
[Presentation] 曲面論におけるGauss写像の役割2008
- Author(s)
  國分雅敏
- Organizer
  第3回札幌・福岡幾何学セミナー
- Place of Presentation
  北海道大学
- Data Source
  KAKENHI-PROJECT-18540096
[Presentation] Asymptotic behavior of flat surfaces in H^32008
- Author(s)
  Masatoshi Kokubu
- Organizer
  国際研究集会'Integrable systems, Geometry and Visualization'
- Place of Presentation
  九州大学
- Year and Date
  2008-12-12
- Data Source
  KAKENHI-PROJECT-18540096
[Presentation] On flat fronts in hyperbolic 3-space2007
- Author(s)
  Masatoshi Kokubu
- Organizer
  Workshop 'Progress in Surface Theory
- Place of Presentation
  Oberwolfach数学研究所(ドイツ)
- Year and Date
  2007-05-02
- Data Source
  KAKENHI-PROJECT-18540096
[Presentation] On flat fronts in hyperbolic 3-space2007
- Author(s)
  Masatoshi Kokubu
- Organizer
  Workshop'Progress in Surface Theory'
- Place of Presentation
  Oberwolfach数学研究所(ドイツ)
- Year and Date
  2007-05-02
- Data Source
  KAKENHI-PROJECT-18540096
[Presentation] On flat fronts in hyperbolic 3-space2007
- Author(s)
  Masatoshi Kokubu
- Organizer
  Workshop 'Progress in Surface Theory'
- Place of Presentation
  Oberwolfach数学研究所(ドイツ)
- Year and Date
  2007-05-02
- Data Source
  KAKENHI-PROJECT-18540096
[Presentation] Linear Weingarten surfaces in a space form
- Author(s)
  Masatoshi Kokubu
- Organizer
  Opening Workshop “Transformation and Singularity”
- Place of Presentation
  ウィーン工科大学（オーストリア，ウィーン）
- Year and Date
  2014-09-15 – 2014-09-20
- Invited
- Data Source
  KAKENHI-PROJECT-22540100

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# of Collaborated Projects: 9 results

# of Collaborated Products: 11 results
2. YAMADA Kotaro (10221657)

# of Collaborated Projects: 8 results

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Kokubu Masatoshi 國分 雅敏

KOKUBU Masatoshi 國分 雅敏

国分 雅敏 コクブ マサトシ

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広義正則曲面の微分幾何に関する体系的研究Principal Investigator

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Differential geometric research of regular surfaces in a wider sensePrincipal Investigator

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Differential geometric research on surfaces admitting singularities and its applicationPrincipal Investigator

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Differential geometric researches on surfaces in a space of constant curvature and their singularitiesPrincipal Investigator

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Kokubu Masatoshi 國分雅敏

KOKUBU Masatoshi 國分雅敏

国分雅敏コクブマサトシ