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OKUMA Tomohiro  奥間 智弘

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… Alternative Names

奧間 智弘  オクマ トモヒロ

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Researcher Number 00300533
Other IDs
Affiliation (Current) 2025: 山形大学, 理学部, 教授
Affiliation (based on the past Project Information) *help 2012 – 2024: 山形大学, 理学部, 教授
2011: 山形大学, 教育文化学部, 准教授
2007 – 2010: Yamagata University, 地域教育文化学部, 准教授
2005 – 2006: Yamagata University, Faculty of Education, Art, and Science, Associate Professor, 地域教育文化学部, 助教授
2005: GUNMA UNIVERSITY, Faculty of Education, Art and Science, Assistany Professor, 教育文化学部, 助教授 … More
2004: 群馬工業高等専門学校, 一般教科(自然科学系), 助教授
2002 – 2004: 群馬工業高等専門学校, 一般教育, 助教授
2000 – 2001: 群馬工業高等専門学校, 一般・講師
1999 – 2000: 群馬工業高等専門学校, 一般教科・自然科学, 講師
1999: Gunma Institute of Technology, lecturer, 一般教科, 講師
1999: 群馬興行高等専門学校, 一般教育, 講師
1998: 群馬工業高等専門学校, 一般教育, 講師 Less
Review Section/Research Field
Principal Investigator
Geometry / Basic Section 11020:Geometry-related / Geometry
Except Principal Investigator
Geometry / Geometry / Algebra / Basic analysis
Keywords
Principal Investigator
2次元特異点 / 幾何種数 / 2次元正規特異点 / good ideal / 重複度 / splice-quotient特異点 / 有理型特異点 / 普遍アーベル被覆 / 楕円型イデアル / 正規正接錐 … More / 正規還元種数 / almost Gorenstein 特異点 / normal reduction number / 特異点 / Brieskorn 完全交叉特異点 / 正規節減数 / 複素2次元特異点 / 2次元特異点 / 擬斉次特異点 / 有理ホモロジー球面 / アーベル被覆 / 埋め込み次元 / Seiberg-Witten不変量 / Casson不変量 / 種数公式 / End Curve Theorem / splice quotient 特異点 / splice type 特異点 / 完全交叉特異点 / 最小楕円型特異点 / 同時特異点解消 / 特異点の小変形 / 良特異点解消 / 多重種数 … More
Except Principal Investigator
特異点 / pencil genus / Pencil種数 / Kodaira singularity / Kodaira特異点 / singularity / 基本種数 / F-threshold / 巡回被覆特異点 / geometric genus / 基本サイクル / 代数曲線の退化族 / 幾何種数 / rational triple point / degeneration with C^*-action / singularity with C^*-action / degeneration of Riemann surfaces / Milnorモノドロミー群 / 局所モノドロミー群 / 複素乗法群 / 閉Riemann面の退化族 / 閉Riemann面 / 有理3重点 / C^*-作用を持つ退化族 / C^*-作用を持つ特異点 / Riemann面の退化族 / universal abelican covering / 2-dimensional singularity / 3-dimensional terminal singularity / elliptic singularity / filtered blowing-up / resolution of singularities / discrepancy / 3次元端末的特異点 / implicit differential systems / multiplierイデアル / 整閉イデアルの対数的特異点解消 / 2次元楕円型特異点 / 完全交叉性 / ベロネーゼ部分環 / 2次元特異点 / 普遍アーベル被覆 / 次元特異点 / 3次元端末特異点 / 楕円型特異点 / フィルター付きブロウイングアップ / 特異点解消 / families of compact algebraic curve / Pencil特異点 / 二 / 代数曲線退化族 / Kulikov singularity / cyclic covering / fundamental cycle / degenerate family of algebraic curves / normal singularity / complex analytic space / 二次元特異点 / Kulikov特異点 / 巡回被覆 / 正規特異点 / 複素解析空間 / curve / degeneration / 有限巡回被覆 / quasi-Kodaira特異点 / 曲線の退化 / 等質有界領域 / 連接層 / ツイスター空間 / 乗数イデアル層 / 解析的捩率 / ケーラー計量 / 複素多様体 / 放物型幾何 / 値分布論 / 乗数層イデアル / ベルグマン核 / ケーラー多様体 / アインシュタイン計量 / CR多様体 / 折り目付きレフシェッツ束 / カスプ / K-同値 / 符号数 / 複素射影平面 / 特異Lefschetz構造 / 障害類 / 同境理論 / 高さ関数 / 2次障害類 / 安定摂動 / モース写像 / 4次元有向同境群 / スペシャル・ジェネリック写像 / 特性類 / 位相不変量 / 曲面絡み目 / 多様体 / 接触 / レーブグラフ / 同境類 / 可微分写像 / 可微分多様体 / 可視化 / 多様体対 / ホモトピー原理 / 特異ファイバー / 同境 / 可微分構造 / 大域的特異点論 / 微分トポロジー Less
  • Research Projects

    (15 results)
  • Research Products

    (100 results)
  • Co-Researchers

    (33 People)
  •  複素2次元特異点の解析的不変量と構造に関する研究Principal Investigator

    • Principal Investigator
      奥間 智弘
    • Project Period (FY)
      2021 – 2025
    • Research Category
      Grant-in-Aid for Scientific Research (C)
    • Review Section
      Basic Section 11020:Geometry-related
    • Research Institution
      Yamagata University
  •  Topological types and analytic invariants of complex surface singularitiesPrincipal Investigator

    • Principal Investigator
      Okuma Tomohiro
    • Project Period (FY)
      2017 – 2021
    • Research Category
      Grant-in-Aid for Scientific Research (C)
    • Research Field
      Geometry
    • Research Institution
      Yamagata University
  •  A study of complex surface singularities with rational homology sphere linkPrincipal Investigator

    • Principal Investigator
      Okuma Tomohiro
    • Project Period (FY)
      2014 – 2016
    • Research Category
      Grant-in-Aid for Scientific Research (C)
    • Research Field
      Geometry
    • Research Institution
      Yamagata University
  •  A study of complex surface singularities whose link is a rational homology spherePrincipal Investigator

    • Principal Investigator
      OKUMA Tomohiro
    • Project Period (FY)
      2011 – 2013
    • Research Category
      Grant-in-Aid for Scientific Research (C)
    • Research Field
      Geometry
    • Research Institution
      Yamagata University
  •  New development of geometric complex analysis

    • Principal Investigator
      HIRACHI Kengo
    • Project Period (FY)
      2010 – 2014
    • Research Category
      Grant-in-Aid for Scientific Research (A)
    • Research Field
      Basic analysis
    • Research Institution
      The University of Tokyo
  •  A study of complex surface singularities with rational homology sphere linksPrincipal Investigator

    • Principal Investigator
      OKUMA Tomohiro
    • Project Period (FY)
      2008 – 2010
    • Research Category
      Grant-in-Aid for Scientific Research (C)
    • Research Field
      Geometry
    • Research Institution
      Yamagata University
  •  Global Theory of Singularities of Differentiable Maps and its Applications

    • Principal Investigator
      SAEKI Osamu
    • Project Period (FY)
      2007 – 2010
    • Research Category
      Grant-in-Aid for Scientific Research (B)
    • Research Field
      Geometry
    • Research Institution
      Kyushu University
  •  2次元特異点の普遍アーベル被覆についてPrincipal Investigator

    • Principal Investigator
      奥間 智弘
    • Project Period (FY)
      2006 – 2007
    • Research Category
      Grant-in-Aid for Young Scientists (B)
    • Research Field
      Geometry
    • Research Institution
      Yamagata University
  •  2次元特異点の幾何種数と位相不変量の関係についてPrincipal Investigator

    • Principal Investigator
      奥間 智弘
    • Project Period (FY)
      2004 – 2005
    • Research Category
      Grant-in-Aid for Young Scientists (B)
    • Research Field
      Geometry
    • Research Institution
      Yamagata University
      Gunma National College of Technology
  •  Filtered blowing-up of local rings and algebraic geometric classification of singularities

    • Principal Investigator
      TOMARI Masataka
    • Project Period (FY)
      2004 – 2005
    • Research Category
      Grant-in-Aid for Scientific Research (C)
    • Research Field
      Algebra
    • Research Institution
      Nihon University
  •  The research of 2-dimensional complex singularities associated to degenerations of closed Riemann surfaces

    • Principal Investigator
      TOMARU Tadashi
    • Project Period (FY)
      2004 – 2005
    • Research Category
      Grant-in-Aid for Scientific Research (C)
    • Research Field
      Geometry
    • Research Institution
      Gunma University
  •  On Pencil genus for normal surface singularities (II)

    • Principal Investigator
      TOMARU Tadashi
    • Project Period (FY)
      2002 – 2003
    • Research Category
      Grant-in-Aid for Scientific Research (C)
    • Research Field
      Geometry
    • Research Institution
      Gunma University
  •  On pencil genus of 2-dimensional singularities

    • Principal Investigator
      TOMARU Tadashi
    • Project Period (FY)
      2000 – 2001
    • Research Category
      Grant-in-Aid for Scientific Research (C)
    • Research Field
      Geometry
    • Research Institution
      Gunma University
  •  2次元正規特異点の多重種数についてPrincipal Investigator

    • Principal Investigator
      奥間 智弘
    • Project Period (FY)
      1999 – 2000
    • Research Category
      Grant-in-Aid for Encouragement of Young Scientists (A)
    • Research Field
      Geometry
    • Research Institution
      Gunma National College of Technology
  •  Research of Quasi-Kodaira singularities

    • Principal Investigator
      TOMARU Tadashi
    • Project Period (FY)
      1998 – 1999
    • Research Category
      Grant-in-Aid for Scientific Research (C)
    • Research Field
      Geometry
    • Research Institution
      Gunma University

All 2025 2024 2023 2022 2021 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 Other

All Journal Article Presentation

  • [Journal Article] Gorensteinness for normal tangent cones of elliptic ideals2025

    • Author(s)
      Okuma Tomohiro、Watanabe Kei-ichi、Yoshida Ken-ichi
    • Journal Title

      Journal of Pure and Applied Algebra

      Volume: 229 Issue: 1 Pages: 107791-107791

    • DOI

      10.1016/j.jpaa.2024.107791

    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-21K03215, KAKENHI-PROJECT-23K03040, KAKENHI-PROJECT-24K06678
  • [Journal Article] THE MULTIPLICITY OF CYCLIC COVERINGS OF A SINGULARITY OF AN ALGEBRAIC VARIETY2024

    • Author(s)
      Kumagai Toya、Okuma Tomohiro
    • Journal Title

      Tsukuba Journal of Mathematics

      Volume: 48 Issue: 2 Pages: 261-271

    • DOI

      10.21099/tkbjm/20244802261

    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-21K03215
  • [Journal Article] The multiplicity of cyclic coverings of a singularity of an algebraic variety2024

    • Author(s)
      T. Kumagai and T. Okuma
    • Journal Title

      Tsukuba J. of Math.

      Volume: -

    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-21K03215
  • [Journal Article] Normal Hilbert coefficients and elliptic ideals in normal two-dimensional singularities2022

    • Author(s)
      Okuma, Tomohiro and Rossi, Maria Evelina and Watanabe, Kei-ichi and Yoshida, Ken-ichi
    • Journal Title

      Nagoya Mathematical Journal

      Volume: - Pages: 1-22

    • DOI

      10.1017/nmj.2022.5

    • Peer Reviewed / Open Access / Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-17K05216, KAKENHI-PROJECT-19K03430, KAKENHI-PROJECT-21K03215, KAKENHI-PROJECT-20K03522
  • [Journal Article] The normal reduction number of two-dimensional cone-like singularities2021

    • Author(s)
      Okuma, Tomohiro and Watanabe, Kei-ichi and Yoshida, Ken-ichi
    • Journal Title

      Proceedings of the American Mathematical Society

      Volume: 149 (no. 11) Issue: 11 Pages: 4569-4581

    • DOI

      10.1090/proc/15565

    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-17K05216
  • [Journal Article] The normal reduction number of two-dimensional cone-like singularities2021

    • Author(s)
      Tomohiro Okuma, Kei-ichi Watanabe, and Ken-ichi Yoshida
    • Journal Title

      Proceedings of the AMS

      Volume: -

    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-17K05216
  • [Journal Article] Normal reduction numbers of normal surface singularities2021

    • Author(s)
      Okuma, Tomohiro
    • Journal Title

      Singularities and their interaction with geometry and low dimensional topology. In honor of Andras Nemethi on the occasion of his 60th birthday.

      Volume: - Pages: 159-179

    • DOI

      10.1007/978-3-030-61958-9_8

    • ISBN
      9783030619572, 9783030619589
    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-17K05216
  • [Journal Article] Weighted homogeneous surface singularities homeomorphic to Brieskorn complete intersections2021

    • Author(s)
      Okuma, Tomohiro
    • Journal Title

      Journal of Singularities

      Volume: 23

    • DOI

      10.5427/jsing.2021.23j

    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-17K05216, KAKENHI-PROJECT-21K03215
  • [Journal Article] Normal Reduction Numbers for Normal Surface Singularities with Application to Elliptic Singularities of Brieskorn Type2019

    • Author(s)
      Okuma Tomohiro、Watanabe Kei-ichi、Yoshida Ken-ichi
    • Journal Title

      Acta Mathematica Vietnamica

      Volume: 44 Issue: 1 Pages: 87-100

    • DOI

      10.1007/s40306-018-00311-4

    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-17K05216, KAKENHI-PROJECT-15H02057, KAKENHI-PROJECT-19K03430
  • [Journal Article] A characterization of two-dimensional rational singularities via core of ideals2018

    • Author(s)
      Okuma Tomohiro、Watanabe Kei-ichi、Yoshida Ken-ichi
    • Journal Title

      J. Algebra

      Volume: 499 Pages: 450-468

    • DOI

      10.1016/j.jalgebra.2017.11.053

    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-17K05216, KAKENHI-PROJECT-15H02057, KAKENHI-PROJECT-16K05110
  • [Journal Article] Cohomology of ideals in elliptic surface singularities2018

    • Author(s)
      T. Okuma
    • Journal Title

      Illinois J. Math.

      Volume: 61

    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-17K05216
  • [Journal Article] A remark on metrically conical surface singularities of Brieskorn type2017

    • Author(s)
      Tomohiro Okuma
    • Journal Title

      Saitama Mathematicakl Journal

      Volume: -

    • Peer Reviewed / Acknowledgement Compliant
    • Data Source
      KAKENHI-PROJECT-26400064
  • [Journal Article] Analytic singularities supported by a specific integral homology sphere link2017

    • Author(s)
      A. Nemethi and T. Okuma
    • Journal Title

      Methods Appl. Anal.

      Volume: 24, No. 2 Issue: 2 Pages: 303-320

    • DOI

      10.4310/maa.2017.v24.n2.a7

    • Peer Reviewed / Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-17K05216, KAKENHI-PROJECT-15H02057
  • [Journal Article] Good ideals and $p_g$-ideals in a two-dimensional normal singularities2016

    • Author(s)
      T.Okuma, K. Watanabe, K. Yoshida
    • Journal Title

      Manuscripta mathematica

      Volume: 未定 Issue: 3-4 Pages: 499-520

    • DOI

      10.1007/s00229-016-0821-7

    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-26400053, KAKENHI-PROJECT-26400064, KAKENHI-PROJECT-15H02057, KAKENHI-PROJECT-16K05110
  • [Journal Article] Rees algebras and pg-ideals in a two-dimensional normal local domain2016

    • Author(s)
      T. Okuma, Kei-ichi Watanabe and Ken-ichi Yoshida
    • Journal Title

      Proceedings of the American Mathematical Society

      Volume: 未定

    • Peer Reviewed / Acknowledgement Compliant
    • Data Source
      KAKENHI-PROJECT-26400064
  • [Journal Article] The multiplicity of abelian covers of splice quotient singularities2015

    • Author(s)
      Tomohiro Okuma
    • Journal Title

      Math. Nachr.

      Volume: 288 Issue: 2-3 Pages: 343-352

    • DOI

      10.1002/mana.201010037

    • Peer Reviewed / Acknowledgement Compliant / Open Access
    • Data Source
      KAKENHI-PROJECT-26400064
  • [Journal Article] The multiplicity of abelian covers of splice quotient  singularities2015

    • Author(s)
      T. Okuma
    • Journal Title

      Math. Nachr.

      Volume: 288

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-22244008
  • [Journal Article] THE MAXIMAL IDEAL CYCLES OVER COMPLETE INTERSECTION SURFACE SINGULARITIES OF BRIESKORN TYPE2014

    • Author(s)
      Fan-Ning Meng and Tomohiro Okuma
    • Journal Title

      Kyushu Journal of Mathematics

      Volume: 68 Issue: 1 Pages: 121-137

    • DOI

      10.2206/kyushujm.68.121

    • NAID

      130004941520

    • ISSN
      1340-6116, 1883-2032
    • Language
      English
    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-23540068
  • [Journal Article] The maximal ideal cycles over complete intersection surface singularities of Brieskorn type2013

    • Author(s)
      Fan-Ning Meng and  T. Okuma
    • Journal Title

      Kyushu J. Math.

      Volume: 掲載確定

    • NAID

      130004941520

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-22244008
  • [Journal Article] Invariants of splice quotient singularities2012

    • Author(s)
      Tomohiro Okuma
    • Journal Title

      IRMA Lect. Math. Theor. Phys.

      Volume: 20 Pages: 149-159

    • DOI

      10.4171/118-1/9

    • ISBN
      9783037191187, 9783037196182
    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-23540068
  • [Journal Article] Invariants of splice quotient singularities2012

    • Author(s)
      T.  Okuma
    • Journal Title

      IRMA Lect. Math. Theor. Phys.

      Volume: 20

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-22244008
  • [Journal Article] Another proof of the end curve theorem for normal surface singularities2010

    • Author(s)
      T.Okuma
    • Journal Title

      J.Math.Soc.Japan 62

      Pages: 1-11

    • NAID

      10026998794

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-20540060
  • [Journal Article] THE GEOMETRIC GENUS, THE CASSON INVARIANT CONJECTURE AND SPLICE TYPE SINGULARITIES2010

    • Author(s)
      T.Okuma
    • Journal Title

      DEMONSTRATIO MATHEMATICA No 2 Vol.43(印刷中)

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-20540060
  • [Journal Article] The embedding dimension of weighted homogeneous surface singularities2010

    • Author(s)
      A.Nemethi, T.Okuma
    • Journal Title

      Journal of Topology

      Volume: 3 Pages: 643-667

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-20540060
  • [Journal Article] The geometric genus, the Casson invariant conjecture and splice type singularities2010

    • Author(s)
      T.Okuma
    • Journal Title

      Demnonstratio Math.

      Volume: 43 Pages: 325-338

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-22244008
  • [Journal Article] The embedding dimension of weighted homogeneous surface singularities2010

    • Author(s)
      A.Nemethi, T.Okuma
    • Journal Title

      Journal of Topology 3

      Pages: 643-667

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-20540060
  • [Journal Article] The embedding dimension of weighted homogeneous surface singularities2010

    • Author(s)
      A.Nemethi, T.Okuma
    • Journal Title

      Journal of Topology

      Volume: 3 Pages: 643-667

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-22244008
  • [Journal Article] Universal abelian covers of certain surface singularities2006

    • Author(s)
      T.Okuma
    • Journal Title

      Math.Ann. 334

      Pages: 753-773

    • Data Source
      KAKENHI-PROJECT-16740042
  • [Journal Article] Universal abelian covers of certain surface singularities2006

    • Author(s)
      T.Okuma
    • Journal Title

      Math.Ann. vol.334

      Pages: 753-773

    • Description
      「研究成果報告書概要(欧文)」より
    • Data Source
      KAKENHI-PROJECT-16540043
  • [Journal Article] Universal abelian covers of certain surface singularities2006

    • Author(s)
      Tomohiro OKUMA
    • Journal Title

      Math. Ann. 334

      Pages: 753-773

    • Description
      「研究成果報告書概要(和文)」より
    • Data Source
      KAKENHI-PROJECT-16540043
  • [Journal Article] Universal abelian covers of certain surface singularities2006

    • Author(s)
      Tomohiro OKUMA
    • Journal Title

      Math.Ann. 334

      Pages: 753-773

    • Data Source
      KAKENHI-PROJECT-16540043
  • [Journal Article] Numerical Gorenstein elliptic singularities2005

    • Author(s)
      Tomohiro Okuma
    • Journal Title

      Math.Z. 249

      Pages: 31-62

    • Data Source
      KAKENHI-PROJECT-16740042
  • [Journal Article] Numerical Gorenstein elliptic singularities2005

    • Author(s)
      Tomohiro OKUMA
    • Journal Title

      Math.Zeitschrift 249

      Pages: 31-62

    • Data Source
      KAKENHI-PROJECT-16540043
  • [Journal Article] Numerical Gorenstein elliptic singularities2005

    • Author(s)
      T.Okuma
    • Journal Title

      Math.Zeitschrift vol.249

      Pages: 31-62

    • Description
      「研究成果報告書概要(欧文)」より
    • Data Source
      KAKENHI-PROJECT-16540043
  • [Journal Article] Numerical Gorenstein elliptic singularities2005

    • Author(s)
      奥間 智弘
    • Journal Title

      Math.Z. 249

      Pages: 31-62

    • Description
      「研究成果報告書概要(和文)」より
    • Data Source
      KAKENHI-PROJECT-16540052
  • [Journal Article] Numerical Gorenstein elliptic singularities2005

    • Author(s)
      Tomohiro OKUMA
    • Journal Title

      Math. Zeitschrift 249

      Pages: 31-62

    • Description
      「研究成果報告書概要(和文)」より
    • Data Source
      KAKENHI-PROJECT-16540043
  • [Journal Article] Numerical Gorenstein elliptic singularities2005

    • Author(s)
      T.Okuma
    • Journal Title

      Math.Z. 249

      Pages: 31-62

    • Description
      「研究成果報告書概要(欧文)」より
    • Data Source
      KAKENHI-PROJECT-16540052
  • [Journal Article] Universal abelian covers of rational surface singularities2004

    • Author(s)
      Tomohiro Okuma
    • Journal Title

      J.London Math.Soc.(2). 70

      Pages: 307-324

    • Data Source
      KAKENHI-PROJECT-16740042
  • [Journal Article] On (-P・-P)-constant deformations of Gorenstein surface singularities2004

    • Author(s)
      Tomohiro Okuma
    • Journal Title

      Comment.Math.Helv. 79

      Pages: 647-658

    • Data Source
      KAKENHI-PROJECT-16740042
  • [Journal Article] On ($-Pcdot P$)-constant deformations of Gorenstein surface singularities

    • Author(s)
      奥間智弘
    • Journal Title

      Commentarli Mathematici Helvetici (印刷中)

    • Data Source
      KAKENHI-PROJECT-16540052
  • [Journal Article] Universal abelian covers of certain surface singularities

    • Author(s)
      T.Okuma
    • Journal Title

      Math.Ann. (to appear)

    • Description
      「研究成果報告書概要(欧文)」より
    • Data Source
      KAKENHI-PROJECT-16540052
  • [Journal Article] Universal abelian covers of certain surfac singularities.

    • Author(s)
      奥間 智弘
    • Journal Title

      Math. Ann. (印刷中)

    • Description
      「研究成果報告書概要(和文)」より
    • Data Source
      KAKENHI-PROJECT-16540052
  • [Presentation] Upper bounds of normal reduction numbers of integrally closed ideals in a 2-dimensional normal rings2024

    • Author(s)
      渡辺 敬一,吉田健一,奥間智弘
    • Organizer
      第45回可換環論シンポジウム
    • Data Source
      KAKENHI-PROJECT-21K03215
  • [Presentation] 正規複素曲面特異点の正規還元種数について2024

    • Author(s)
      奥間智弘
    • Organizer
      2024年度多変数関数論冬セミナー
    • Invited
    • Data Source
      KAKENHI-PROJECT-21K03215
  • [Presentation] Geometric aspects of ideals in a normal surface singularity2023

    • Author(s)
      Tomohiro Okuma
    • Organizer
      Mini workshop on singularities---Various aspects of singularities---
    • Invited
    • Data Source
      KAKENHI-PROJECT-21K03215
  • [Presentation] Normal tangent cone for the maximal ideal of a certain hypersurface2023

    • Author(s)
      吉田健一,奥間智弘,渡辺 敬一
    • Organizer
      日本数学会2024年度年会代数学分科会
    • Data Source
      KAKENHI-PROJECT-21K03215
  • [Presentation] Gorenstein normal tangent cones2023

    • Author(s)
      吉田健一,奥間智弘,渡辺 敬一
    • Organizer
      日本数学会2023年度秋季総合分科会
    • Data Source
      KAKENHI-PROJECT-21K03215
  • [Presentation] 複素2次元特異点の解析的不変量について2023

    • Author(s)
      奥間智弘
    • Organizer
      日本数学会2023年度秋季総合分科会
    • Invited
    • Data Source
      KAKENHI-PROJECT-21K03215
  • [Presentation] Gorensteinness for normal tangent cones of the maximal ideals of Brieskorn hypersurfaces2023

    • Author(s)
      吉田健一,奥間智弘,渡辺 敬一
    • Organizer
      日本数学会2022年度年会
    • Data Source
      KAKENHI-PROJECT-21K03215
  • [Presentation] 複素2次元特異点の基本的な解析的不変量について2022

    • Author(s)
      奥間智弘
    • Organizer
      日本数学会東北支部会
    • Invited
    • Data Source
      KAKENHI-PROJECT-21K03215
  • [Presentation] Gorensteinness for normal tangent cones of elliptic ideals2022

    • Author(s)
      吉田健一,奥間智弘,渡辺 敬一
    • Organizer
      日本数学会2022年度秋季総合分科会
    • Data Source
      KAKENHI-PROJECT-21K03215
  • [Presentation] The core of ideals in minimally elliptic singularities2022

    • Author(s)
      奥間智弘,吉田健一,渡辺 敬一
    • Organizer
      日本数学会2022年度年会
    • Data Source
      KAKENHI-PROJECT-21K03215
  • [Presentation] 複素2次元特異点の基本的な解析的不変量について2022

    • Author(s)
      奥間智弘
    • Organizer
      日本数学会東北支部会
    • Invited
    • Data Source
      KAKENHI-PROJECT-17K05216
  • [Presentation] Normal reduction numbers of normal surface singularities2019

    • Author(s)
      Tomohiro Okuma
    • Organizer
      Geometry and Topology of Singularities--- In honor of Andras Nemethi's 60th birthday
    • Invited / Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-17K05216
  • [Presentation] Normal reduction numbers and cohomology of normal surface singularities2019

    • Author(s)
      Tomohiro Okuma
    • Organizer
      Algebraic surfaces and related topics---In honor of Kazuhiro Konno's 60th birthday
    • Invited / Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-17K05216
  • [Presentation] Weighted homogeneous surface singularities homeomorphic to Brieskorn complete intersections2019

    • Author(s)
      奥間智弘
    • Organizer
      日本数学会
    • Data Source
      KAKENHI-PROJECT-17K05216
  • [Presentation] Complex surface singularities with a fixed integral homology sphere link2017

    • Author(s)
      奥間智弘
    • Organizer
      日本数学会年会函数論分科会
    • Place of Presentation
      首都大学東京(東京都・八王子市)
    • Year and Date
      2017-03-25
    • Data Source
      KAKENHI-PROJECT-26400064
  • [Presentation] 位相型が等しくタイプが異なる複素2次元特異点について2017

    • Author(s)
      奥間智弘
    • Organizer
      第60回函数論シンポジウム
    • Invited
    • Data Source
      KAKENHI-PROJECT-17K05216
  • [Presentation] Cohomology of ideal sheaves on resolutions of surface singularities2017

    • Author(s)
      奥間智弘
    • Organizer
      2017年度多変数関数論冬セミナー
    • Invited
    • Data Source
      KAKENHI-PROJECT-17K05216
  • [Presentation] Cohomology of ideals in normal surface singularities2017

    • Author(s)
      T. Okuma
    • Organizer
      International Conference on Singularity Theory
    • Invited / Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-17K05216
  • [Presentation] A characterization of rational surface singularities via core of ideals2016

    • Author(s)
      Tomohiro Okuma
    • Organizer
      The 4th Franco-Japanese-Vietnamese Singularities
    • Place of Presentation
      Chambery (France)
    • Year and Date
      2016-11-08
    • Invited / Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-26400064
  • [Presentation] 2次元特異点の幾何種数イデアルと次数1の楕円型特異点について2015

    • Author(s)
      奥間智弘
    • Organizer
      2015年度多変数関数論冬セミナー
    • Place of Presentation
      京都大学
    • Year and Date
      2015-12-26
    • Data Source
      KAKENHI-PROJECT-26400064
  • [Presentation] 2次元特異点における Good ideal と $p_g$-ideal2014

    • Author(s)
      奥間智弘,渡辺敬一,吉田健一
    • Organizer
      日本数学会秋季総合分科会
    • Place of Presentation
      広島大学
    • Year and Date
      2014-09-26
    • Data Source
      KAKENHI-PROJECT-26400064
  • [Presentation] Good ideals and $p_g$-ideals in normal surface singularities2014

    • Author(s)
      Tomohiro Okuma
    • Organizer
      Commutative Algebra and Singularity Theory 2014
    • Place of Presentation
      立山国際ホテル
    • Year and Date
      2014-07-31
    • Data Source
      KAKENHI-PROJECT-26400064
  • [Presentation] Good ideals and $p_g$-ideals in normal surface singularities2014

    • Author(s)
      T. Okuma
    • Organizer
      Commutative Algebra and Singularity Theory 2014
    • Place of Presentation
      立山国際ホテル
    • Year and Date
      2014-07-31
    • Invited
    • Data Source
      KAKENHI-PROJECT-22244008
  • [Presentation] Good ideals for Gorenstein surface singularities2013

    • Author(s)
      T. Okuma
    • Organizer
      The 1st Franco-Japanese-Vietnamese Symposium on Singularities
    • Place of Presentation
      Universite Nice Sophia Antipolis, Nice, France
    • Year and Date
      2013-09-21
    • Data Source
      KAKENHI-PROJECT-23540068
  • [Presentation] Good ideals for normal surface singularities2013

    • Author(s)
      Tomohiro Okuma
    • Organizer
      Hyperplane Arrangements and Characteristic classes
    • Place of Presentation
      京都大学
    • Invited
    • Data Source
      KAKENHI-PROJECT-22244008
  • [Presentation] Good ideals for Gorenstein surface singularities2013

    • Author(s)
      Tomohiro Okuma
    • Organizer
      The 1st Franco-Japanese- Vietnamese Symposium on Singularities
    • Place of Presentation
      Universite Nice (France)
    • Invited
    • Data Source
      KAKENHI-PROJECT-22244008
  • [Presentation] Good ideals for normal surface singularities2013

    • Author(s)
      T. Okuma
    • Organizer
      Hyperplane Arrangements and Characteristic classes
    • Place of Presentation
      京都大学数理解析研究所
    • Year and Date
      2013-11-12
    • Data Source
      KAKENHI-PROJECT-23540068
  • [Presentation] 複素2次元特異点の幾何種数について2013

    • Author(s)
      奥間智弘
    • Organizer
      日本数学会東北支部会
    • Place of Presentation
      東北大学大学院理学研究科
    • Year and Date
      2013-02-16
    • Data Source
      KAKENHI-PROJECT-23540068
  • [Presentation] The maximal ideal cycles over complete intersection surface singularities of Brieskorn type2013

    • Author(s)
      奥間智弘
    • Organizer
      日本数学会年会函数論分科会
    • Place of Presentation
      京都大学
    • Year and Date
      2013-03-23
    • Data Source
      KAKENHI-PROJECT-23540068
  • [Presentation] 複素2 次元特異点の幾何種数について(特別講演)2013

    • Author(s)
      奥間智弘
    • Organizer
      日本数学会東北支部会
    • Place of Presentation
      東北大学
    • Invited
    • Data Source
      KAKENHI-PROJECT-22244008
  • [Presentation] The maximal ideal cycles over complete intersection surface singularities of Brieskorn type2013

    • Author(s)
      奥間智弘,孟凡寧
    • Organizer
      日本数学会年会
    • Place of Presentation
      京都大学
    • Data Source
      KAKENHI-PROJECT-22244008
  • [Presentation] 複素2次元特異点の幾何種数について2012

    • Author(s)
      奥間智弘
    • Organizer
      日本数学会年会函数論分科会
    • Place of Presentation
      東京理科大学理学部
    • Year and Date
      2012-03-27
    • Data Source
      KAKENHI-PROJECT-23540068
  • [Presentation] 2次元特異点の幾何種数と periodic constant について2012

    • Author(s)
      奥間智弘
    • Organizer
      特異点と多様体の幾何学
    • Place of Presentation
      山形大学
    • Invited
    • Data Source
      KAKENHI-PROJECT-22244008
  • [Presentation] 複素2次元特異点の幾何種数について2012

    • Author(s)
      奥間智弘
    • Organizer
      日本数学会年会函数論分科会特別講演
    • Place of Presentation
      東京理科大学(東京)(招待講演)
    • Year and Date
      2012-03-27
    • Data Source
      KAKENHI-PROJECT-22244008
  • [Presentation] 複素2次元特異点の幾何種数について2012

    • Author(s)
      奥間智弘
    • Organizer
      日本数学会年会函数論分科会(招待講演)
    • Place of Presentation
      東京理科大学理学部
    • Data Source
      KAKENHI-PROJECT-23540068
  • [Presentation] 2次元特異点の幾何種数とperiodic constant について2012

    • Author(s)
      奥間智弘
    • Organizer
      特異点と多様体の幾何学
    • Place of Presentation
      山形大学理学部
    • Year and Date
      2012-08-25
    • Data Source
      KAKENHI-PROJECT-23540068
  • [Presentation] The embedding dimension of weighted homogeneous complex surface2011

    • Author(s)
      Tomohiro Okuma
    • Organizer
      第4回日豪実・複素特異点研究集会
    • Place of Presentation
      兵庫教育大学神戸サテライト
    • Data Source
      KAKENHI-PROJECT-23540068
  • [Presentation] On the geometric genus of certain surface singularities2011

    • Author(s)
      T. Okuma
    • Organizer
      第6回日仏特異点シンポジウム
    • Place of Presentation
      九州大学西新プラザ
    • Year and Date
      2011-09-05
    • Data Source
      KAKENHI-PROJECT-23540068
  • [Presentation] On the geometric genus of certain surface singularities2011

    • Author(s)
      奥間智弘
    • Organizer
      第6回日仏特異点シンポジウム
    • Place of Presentation
      九州大学西新プラザ(招待講演)
    • Year and Date
      2011-09-05
    • Data Source
      KAKENHI-PROJECT-22244008
  • [Presentation] A formula for the geometric genus of surface singularities2011

    • Author(s)
      T.Okuma
    • Organizer
      Branched Coverings, Degenerations, and Related Topics 2011
    • Place of Presentation
      首都大学東京
    • Year and Date
      2011-03-09
    • Data Source
      KAKENHI-PROJECT-22244008
  • [Presentation] The embedding dimension of weighted homogeneous complex surface singularities2011

    • Author(s)
      奥間智弘
    • Organizer
      第4回日豪実・複素特異点研究集会
    • Place of Presentation
      兵庫教育大学神戸サテライト(兵庫)(招待講演)
    • Year and Date
      2011-11-23
    • Data Source
      KAKENHI-PROJECT-22244008
  • [Presentation] A formula for the geometric genus of surface singularities2011

    • Author(s)
      奥間智弘
    • Organizer
      Branched Coverings, Degenerations, and Related Topics 2011
    • Place of Presentation
      首都大学東京南大沢キャンパス
    • Year and Date
      2011-03-09
    • Data Source
      KAKENHI-PROJECT-20540060
  • [Presentation] The embedding dimension of weighted homogeneous complex surface singularities2011

    • Author(s)
      T. Okuma
    • Organizer
      第4回日豪実・複素特異点研究集会
    • Place of Presentation
      兵庫教育大学神戸サテライト
    • Year and Date
      2011-11-23
    • Data Source
      KAKENHI-PROJECT-23540068
  • [Presentation] 2次元特異点の幾何種数公式2010

    • Author(s)
      奥間智弘
    • Organizer
      平成22年度 多変数関数論冬セミナー
    • Place of Presentation
      京都大学 理学研究科
    • Year and Date
      2010-12-24
    • Data Source
      KAKENHI-PROJECT-20540060
  • [Presentation] 2次元特異点の幾何種数公式2010

    • Author(s)
      奥間智弘
    • Organizer
      2010年度多変数関数論冬セミナー
    • Place of Presentation
      京都大学理学研究科
    • Year and Date
      2010-12-24
    • Data Source
      KAKENHI-PROJECT-20540060
  • [Presentation] Invariants of splice quotient singularities2010

    • Author(s)
      奥間智弘
    • Organizer
      特異点と多様体の幾何学
    • Place of Presentation
      山形大学理学部
    • Year and Date
      2010-09-18
    • Data Source
      KAKENHI-PROJECT-20540060
  • [Presentation] Invariants of splice quotient singularities2010

    • Author(s)
      T.Okuma
    • Organizer
      特異点と多様体の幾何学
    • Place of Presentation
      山形大学
    • Year and Date
      2010-09-18
    • Data Source
      KAKENHI-PROJECT-22244008
  • [Presentation] Invariants of splice quotient singularities2009

    • Author(s)
      奥間智弘
    • Organizer
      第5回日仏特異点シンポジウム
    • Place of Presentation
      IRMA, Strasbourg, France
    • Year and Date
      2009-08-27
    • Data Source
      KAKENHI-PROJECT-20540060
  • [Presentation] Splice quotient singularities and the Casson invariant conjecture2009

    • Author(s)
      奥間智弘
    • Organizer
      第56回トポロジーシンポジウム
    • Place of Presentation
      北海道大学
    • Year and Date
      2009-08-08
    • Data Source
      KAKENHI-PROJECT-20540060
  • [Presentation] スプライス商特異点の重複度2009

    • Author(s)
      奥間智弘
    • Organizer
      トポロジーと写像の特異点
    • Place of Presentation
      信州大学理学部
    • Year and Date
      2009-06-04
    • Data Source
      KAKENHI-PROJECT-20540060
  • [Presentation] Splice quotient singularities and the Casson invariant conjecture2009

    • Author(s)
      奥間智弘
    • Organizer
      第56回トポロジーシンポジウム
    • Place of Presentation
      北海道大学クラーク会館
    • Year and Date
      2009-08-08
    • Data Source
      KAKENHI-PROJECT-20540060
  • [Presentation] Invariants of splice quotient singularities2009

    • Author(s)
      奥間智弘
    • Organizer
      第5回日仏特異点シンポジウム
    • Place of Presentation
      ストラスブール大学,フランス
    • Year and Date
      2009-08-27
    • Data Source
      KAKENHI-PROJECT-20540060
  • [Presentation] Normal surface singularities of splice type2008

    • Author(s)
      奥間智弘
    • Organizer
      Hodge 理論, 退化, 特異点の代数幾何とトポロジー
    • Place of Presentation
      東北学院大学
    • Year and Date
      2008-03-13
    • Data Source
      KAKENHI-PROJECT-18740024
  • [Presentation] The Casson Invariant Conjecture and splice type singularities2007

    • Author(s)
      奥間智弘
    • Organizer
      "Geometric Singularity Theory"Polish-Japanese Singularity Theory Working Days
    • Place of Presentation
      ポーランド科学アカデミー数学研究所
    • Year and Date
      2007-07-10
    • Data Source
      KAKENHI-PROJECT-18740024
  • [Presentation] Good ideals for Gorenstein surface singularities

    • Author(s)
      Tomohiro Okuma
    • Organizer
      The 1st Franco-Japanese-Vietnamese Symposium on Singularities
    • Place of Presentation
      Universite Nice Sophia Antipolis, Nice, France.
    • Data Source
      KAKENHI-PROJECT-23540068
  • [Presentation] 複素2 次元特異点の幾何種数について

    • Author(s)
      奥間智弘
    • Organizer
      日本数学会東北支部会
    • Place of Presentation
      東北大学
    • Invited
    • Data Source
      KAKENHI-PROJECT-23540068
  • [Presentation] 2次元特異点の幾何種数と periodic constant について

    • Author(s)
      奥間智弘
    • Organizer
      研究集会 「特異点と多様体の幾何学」
    • Place of Presentation
      山形大学
    • Data Source
      KAKENHI-PROJECT-23540068
  • [Presentation] Good ideals for normal surface singularities

    • Author(s)
      Tomohiro Okuma
    • Organizer
      Hyperplane Arrangements and Characteristic classes
    • Place of Presentation
      京都大学数理解析研究所
    • Data Source
      KAKENHI-PROJECT-23540068
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    # of Collaborated Products: 1 results
  • 29.  MATSUURA Yutaka (50096905)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 30.  FUKUDA Takuo (00009599)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 31.  岩瀬 順一 (70183746)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 32.  Nemethi Andras
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 33.  吉田 健一
    # of Collaborated Projects: 0 results
    # of Collaborated Products: 1 results

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