SAITO Natsuo 齋藤夏雄

… Alternative Names

齋藤夏雄サイトウナツオ

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Researcher Number	70382372
Other IDs
Affiliation (Current)	2025: 広島市立大学, 情報科学研究科, 教授
Affiliation (based on the past Project Information) *help	2017 – 2021: 広島市立大学, 情報科学研究科, 准教授 2009 – 2016: Hiroshima City University, 情報科学研究科, 講師 2015: 広島市立大学, 大学院情報科学研究科, 講師 2011: 広島市立大学, 大学院・情報科学研究科, 講師 2007: Hiroshima City University, 情報科学研究科, 助教 2007: Hiroshima University, Graduate School of Information Sciences, Lecturer 2005 – 2006: 広島市立大学, 情報科学部, 助手
Review Section/Research Field	Principal Investigator Algebra Except Principal Investigator Algebra
Keywords	Principal Investigator 正標数 / 代数多様体 / del Pezzo曲面 / 準楕円曲面 / 有理二重点 / 変形理論 / 特異点 / Calabi-Yau多様体 / 代数幾何学 / デル・ペッツォ曲面 … More / 単純特異点 / ファノ多様体 / F分裂性 / 変形空間 … More Except Principal Investigator 特異点 / Calabi-Yau多様体 / K3曲面 / 楕円曲面 / 正標数 / 代数幾何学 / 代数学 / 消去問題 / Qホモロジー射影平面 / 正規デルペッゾ曲面 / 高階導分 / 多項式環 / 対数的小平次元 / 正規代数曲面 / 開代数曲面 / Enriques曲面 / Artin-Schreier拡大 / Frobenius写像 / 野生的群作用 / 正標数特異点 / 導分 / 代数多様体 / 非ケーラー幾何 / 疑似乱数生成 / 群スキーム / Canonical singularities / K3 surfaces / (quasi-elliptic) elliptic surfaces / Rational singularities / Calabi-Yau varieties / Algebraic Geometry in positive characteristic / モジュライ空間 / 超特異K3曲面 / 準楕円曲面 / Mordell-weil格子 / 正標数の代数多様体 / 標準特異点 / (隼楕円)楕円曲面 / 有理特異点 / 正標数代数幾何学 / 楕円局面 / 変形理論 / 疑似乱数 / 有限体 / Mordell-Weil格子 Less

Study on Fano varieties defined over an algebraically closed field in positive characteristicPrincipal Investigator
- Principal Investigator
  
  Saito Natsuo
- Project Period (FY)
  2017 – 2021
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Algebra
- Research Institution
  Hiroshima City University
Understanding the structure of open algebraic surfaces and normal algebraic surfaces of logarithmic Kodaira dimension one or less
- Principal Investigator
  
  Kojima Hideo
- Project Period (FY)
  2014 – 2016
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Algebra
- Research Institution
  Niigata University
Research on algebraic varieties defined over an algebracally closed field in positive characteristicPrincipal Investigator
- Principal Investigator
  
  Saito Natsuo
- Project Period (FY)
  2012 – 2015
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Algebra
- Research Institution
  Hiroshima City University
Toward the resolution of problems on algebraic varieties in positive characteristic
- Principal Investigator
  
  Ito Hiroyuki
- Project Period (FY)
  2012 – 2015
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Algebra
- Research Institution
  Tokyo University of Science
Problems on algebraic geometry in positive characteristicPrincipal Investigator
- Principal Investigator
  
  SAITO Natsuo
- Project Period (FY)
  2009 – 2012
- Research Category
  
  Grant-in-Aid for Young Scientists (B)
- Research Field
  
  Algebra
- Research Institution
  Hiroshima City University
Research for arithmetic and geometry of algebraic varieties including positive characteristic
- Principal Investigator
  
  HIROYUKI Ito (ITO Hiroyuki)
- Project Period (FY)
  2008 – 2011
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Algebra
- Research Institution
  Tokyo University of Science
  Hiroshima University
正標数の代数的閉体上定義された代数多様体の研究Principal Investigator
- Principal Investigator
  
  齋藤夏雄
- Project Period (FY)
  2005 – 2007
- Research Category
  
  Grant-in-Aid for Young Scientists (B)
- Research Field
  
  Algebra
- Research Institution
  Hiroshima City University
Research on arithmetic and geometry for algebraic varieties in positive characteristic.
- Principal Investigator
  
  ITO Hiroyuki
- Project Period (FY)
  2005 – 2007
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Algebra
- Research Institution
  Hiroshima University

All 2021 2020 2019 2018 2016 2015 2013 2011 2010 2009 2008 2007 2006 2005 Other

All Journal Article Presentation

[Journal Article] On the multicanonical systems of quasi-elliptic surfaces2021
- Author(s)
  KATSURA Toshiyuki、SAITO Natsuo
- Journal Title
  
  Journal of the Mathematical Society of Japan
  
  Volume: 73 Issue: 4 Pages: 1253-1261
- DOI
  10.2969/jmsj/85058505
- NAID
  130008106927
- ISSN
  0025-5645, 1881-1167, 1881-2333
- Language
  English
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-17K05208, KAKENHI-PROJECT-20K03530
[Journal Article] Three dimensional canonical singularities in codimension two in positive characteristic2013
- Author(s)
  Masayuki Hirokado, Hiroyuki Ito, Natsuo Saito
- Journal Title
  
  Journal of Algebra
  
  Volume: 373 Pages: 207-222
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21740027
[Journal Article] Three dimensional canonical singularities in codimension two in positive characteristic2013
- Author(s)
  Masayuki Hirokado, Hiroyuki Ito, Natsuo Saito
- Journal Title
  
  Journal of Algebra
  
  Volume: 373 Pages: 207-222
- DOI
  10.1016/j.jalgebra.2012.10.007
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-24540046, KAKENHI-PROJECT-24540051
[Journal Article] 正標数の有理二重点の変形について2011
- Author(s)
  齋藤夏雄
- Journal Title
  
  研究集会「射影多様体の幾何とその周辺2011」報告集
  
  Pages: 73-84
- Data Source
  KAKENHI-PROJECT-21740027
[Journal Article] Calabi-Yau threefolds arising from fiber products of rational quasi-elliptic surfaces, II2008
- Author(s)
  M. Hirokado, H. Ito, N, Saito
- Journal Title
  
  Manuscripta Mathematica 125
  
  Pages: 325-343
- NAID
  120000877734
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20540044
[Journal Article] Calabi-Yau threefolds arising from fiber products of rational quasi-elliptic surfaces2008
- Author(s)
  Masayuki Hirokado, Hiroyuki Ito and Natsuo Saito
- Journal Title
  
  Manuscripta Mathematica
  
  Volume: Vol.125 Pages: 325-343
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20540044
[Journal Article] Calabi-Yau threefolds arising from fiber products of rational quasi-elliptic surfaces, II2008
- Author(s)
  Masayuki, Hirokado, Hiroyuki, Ito, Natsuo, Saito
- Journal Title
  
  Manuscripta Mathematica 125
  
  Pages: 325-343
- NAID
  120000877734
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-17540027
[Journal Article] Calabi-Yau threefolds arising from fiber products of rational quasi-elliptic surfaces, II2008
- Author(s)
  Masayuki Hirokado,Hiroyuki Ito, Natsuo Saito
- Journal Title
  
  Manuscripta Mathematica Vol.125
  
  Pages: 325-343
- NAID
  120000877734
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20540044
[Journal Article] Calabi-Yau threefolds arising from fiber products of rational quasi-elliptic surfaces, I2007
- Author(s)
  Masayuki, Hirokado, Hiroyuki, Ito, Natsuo, Saito
- Journal Title
  
  Arkiv for Matematik 45
  
  Pages: 279-296
- NAID
  120000877735
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-17540027
[Journal Article] Calabi-Yau 3-folds from fiber products of rational quasi-elliptic surfaces2006
- Author(s)
  齋藤夏雄
- Journal Title
  
  代数幾何学シンポジウム報告集
  
  Pages: 95-104
- NAID
  120005763665
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-17540027
[Journal Article] Calabi-Yau 3-folds from fiber products of ratinal quasi-elliptic surfaces2006
- Author(s)
  Natsuo, Saito
- Journal Title
  
  Proceedings of the symposium on algebraic geometry, Kinosaki
  
  Pages: 95-104
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-17540027
[Journal Article] On 3-folds arising from the products of quasi-elliptic Surfaces2006
- Author(s)
  Natsuo, Saito
- Journal Title
  
  Proceedings of the symposium on the geometry of projective variteties 2006
  
  Pages: 49-61
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-17540027
[Journal Article] 準楕円曲面の積から得られる3じげんCalabi-Yau多様体について2006
- Author(s)
  齋藤夏雄
- Journal Title
  
  「射影多様体の幾何とその周辺2006」報告集
  
  Pages: 49-61
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-17540027
[Journal Article] Calabi-Yau threefolds arising from fiber products of rational quasi-elliptic surfaces, I
- Author(s)
  廣門正行, 伊藤浩行, 齋藤夏雄
- Journal Title
  
  Arkiv for matematik (未定)
- NAID
  120000877735
- Data Source
  KAKENHI-PROJECT-17740022
[Presentation] On the multicanonical systems of quasi-elliptic surfaces2021
- Author(s)
  齋藤　夏雄
- Organizer
  野田代数幾何学ワークショップ2021
- Invited
- Data Source
  KAKENHI-PROJECT-17K05208
[Presentation] F分裂しないdel Pezzo曲面とその自己同型群2020
- Author(s)
  齋藤　夏雄
- Organizer
  第７回代数幾何学研究集会－宇部－
- Invited
- Data Source
  KAKENHI-PROJECT-17K05208
[Presentation] F分裂しないdel Pezzo曲面の探究2019
- Author(s)
  齋藤　夏雄
- Organizer
  研究集会「ファノ多様体及び関連する代数幾何学」
- Invited
- Data Source
  KAKENHI-PROJECT-17K05208
[Presentation] F分裂しないdel Pezzo曲面について2019
- Author(s)
  齋藤　夏雄
- Organizer
  研究集会「射影多様体の幾何とその周辺2019」
- Invited
- Data Source
  KAKENHI-PROJECT-17K05208
[Presentation] Deformation spaces of rational double points in small characteristic2018
- Author(s)
  齋藤　夏雄
- Organizer
  野田代数幾何学シンポジウム2018
- Invited
- Data Source
  KAKENHI-PROJECT-17K05208
[Presentation] Fano varieties in positive characteristic and their F-splittings2018
- Author(s)
  Natsuo Saito
- Organizer
  Hakodate workshop on arithmetic geometry 2018
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17K05208
[Presentation] F-splitting and Fano varieties2016
- Author(s)
  齋藤　夏雄
- Organizer
  研究集会「高次元代数幾何とその周辺」
- Place of Presentation
  京都大学
- Year and Date
  2016-02-04
- Invited
- Data Source
  KAKENHI-PROJECT-24540046
[Presentation] F分裂性をもたないdel Pezzo曲面について2015
- Author(s)
  齋藤　夏雄
- Organizer
  第9回代数曲面ワークショップ
- Place of Presentation
  首都大学東京
- Year and Date
  2015-05-16
- Invited
- Data Source
  KAKENHI-PROJECT-24540046
[Presentation] F-splitting and Fano varieties2015
- Author(s)
  齋藤　夏雄
- Organizer
  第13回アフィン代数幾何学研究集会
- Place of Presentation
  関西学院大学
- Year and Date
  2015-03-05
- Invited
- Data Source
  KAKENHI-PROJECT-24540046
[Presentation] F分裂性とdel Pezzo曲面2015
- Author(s)
  齋藤　夏雄
- Organizer
  農工大数学セミナー2015
- Place of Presentation
  東京農工大学
- Year and Date
  2015-06-24
- Invited
- Data Source
  KAKENHI-PROJECT-24540046
[Presentation] del Pezzo曲面のF分裂性について2015
- Author(s)
  齋藤　夏雄
- Organizer
  野田代数幾何学シンポジウム
- Place of Presentation
  東京理科大学
- Year and Date
  2015-03-16
- Invited
- Data Source
  KAKENHI-PROJECT-24540046
[Presentation] Characterization of non-F-split del Pezzo surfaces2015
- Author(s)
  齋藤　夏雄
- Organizer
  城崎代数幾何学シンポジウム
- Place of Presentation
  城崎国際アートセンター
- Year and Date
  2015-10-20
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-24540046
[Presentation] 正標数の有理二重点の変形について2011
- Author(s)
  齋藤夏雄
- Organizer
  研究集会「射影多様体の幾何とその周辺2011」
- Place of Presentation
  高知大学
- Year and Date
  2011-11-04
- Data Source
  KAKENHI-PROJECT-21740027
[Presentation] 正標数の有理二重点の変形について2011
- Author(s)
  齋藤夏雄
- Organizer
  射影多様体の幾何とその周辺2011
- Place of Presentation
  高知大学
- Year and Date
  2011-11-04
- Data Source
  KAKENHI-PROJECT-21740027
[Presentation] On the multicanonical system of quasi-elliptic surfaces2010
- Author(s)
  齋藤夏雄
- Organizer
  アフィン代数幾何学研究集会
- Place of Presentation
  関西学院大学
- Year and Date
  2010-09-04
- Data Source
  KAKENHI-PROJECT-21740027
[Presentation] Quasi-elliptic surfaceとその応用2010
- Author(s)
  齋藤夏雄
- Organizer
  代数幾何研究集会2010
- Place of Presentation
  法政大学
- Year and Date
  2010-07-17
- Data Source
  KAKENHI-PROJECT-21740027
[Presentation] On the deformations of rational double points in positive characteristic2009
- Author(s)
  齋藤夏雄
- Organizer
  「正標数の代数幾何」研究集会
- Place of Presentation
  法政大学
- Year and Date
  2009-12-19
- Data Source
  KAKENHI-PROJECT-21740027
[Presentation] Calabi-Ya u 3-folds arising from fiber products of quasi-elliptic surfaces2009
- Author(s)
  Natsuo Saito
- Organizer
  1st PRIMA Congress
- Place of Presentation
  The University of New South Wales, Sydney, Australia.
- Year and Date
  2009-07-07
- Data Source
  KAKENHI-PROJECT-21740027
[Presentation] Calabi-Yau 3-folds arising from fiber products of quasi-elliptic surfaces2009
- Author(s)
  齋藤夏雄
- Organizer
  1st PRIMA Congress
- Place of Presentation
  UNSW, Sydney
- Year and Date
  2009-07-07
- Data Source
  KAKENHI-PROJECT-21740027
[Presentation] On certain Calabi-Yau threefolds in positive characteristic2007
- Author(s)
  N. Saito
- Organizer
  COE seminar on Algebraic Geometry
- Place of Presentation
  慶応大学
- Year and Date
  2007-09-04
- Data Source
  KAKENHI-PROJECT-17540027
[Presentation] On certain Calabi-Yau threefolds in positive characteristic2007
- Author(s)
  齋藤夏雄
- Organizer
  COE Seminar on Algebraic Geometry
- Place of Presentation
  慶應義塾大学
- Year and Date
  2007-09-04
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-17540027
[Presentation] On certain Calabi-Yau threefolds in positive characteristic2007
- Author(s)
  Natsuo, Saito
- Organizer
  COE Seminar on Algebraic Geometry
- Place of Presentation
  Keio University
- Year and Date
  2007-09-04
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-17540027
[Presentation] Calabi-Yau 3-folds from fiber products of quasi-elliptic surfaces2006
- Author(s)
  齋藤夏雄
- Organizer
  代数幾何学シンポジウム
- Place of Presentation
  兵庫県立城崎大会議館
- Year and Date
  2006-10-26
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-17540027
[Presentation] Fano 3-folds in positive characteristic and wild hypersurfaces2006
- Author(s)
  齋藤夏雄
- Organizer
  2006/2007 Moduli Spaces,
- Place of Presentation
  スウェーデン、Mittag-Leffler研究所
- Year and Date
  2006-09-21
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-17540027
[Presentation] 楕円曲面の積として得られる正標数Calabi-Yau多様体について2006
- Author(s)
  齋藤夏雄
- Organizer
  日本数学界年回
- Place of Presentation
  中央大学
- Year and Date
  2006-03-26
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-17540027
[Presentation] Calabi-Yau threefolds from fiber products of quasi-elliptic surfaces2006
- Author(s)
  Natsuo, Saito
- Organizer
  Symposium on Algebraic Geometry
- Place of Presentation
  Kinosaki Conference Hall
- Year and Date
  2006-10-26
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-17540027
[Presentation] Fano 3-folds in positive characteristic and wild hypersurfaces2006
- Author(s)
  Natsuo, Saito
- Organizer
  2006/2007 Moduli spaces
- Place of Presentation
  Sweden Mittag-Leffler Institute
- Year and Date
  2006-09-21
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-17540027
[Presentation] Calabi-Yau threefolds arising from fiber products of rational quasi-elliptic surfaces2006
- Author(s)
  Natsuo, Saito
- Organizer
  Symposium on the geometry of projective varieties, 2006
- Place of Presentation
  Kochi University
- Year and Date
  2006-11-04
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-17540027
[Presentation] 準楕円曲面の積から得られる3次元Calabi-Yau多様体について2006
- Author(s)
  齋藤夏雄
- Organizer
  射影多様体の幾何とその周辺2006
- Place of Presentation
  高知大学理学部
- Year and Date
  2006-11-04
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-17540027
[Presentation] On Calabi-Yau varieties arising from the products of quasi-elliptic surfaces in positive characteristic2006
- Author(s)
  Natsuo, Saito
- Organizer
  Annual meeting of Japan Mathematical Society
- Place of Presentation
  Chuo University
- Year and Date
  2006-03-26
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-17540027
[Presentation] On certain Calabi-Yau varieties in positive characteristic, III2005
- Author(s)
  Natsuo, Saito
- Organizer
  Workshop on algebraic geometry, Sendai 2005 Autumn
- Place of Presentation
  Tohoku University
- Year and Date
  2005-11-08
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-17540027
[Presentation] ある種の正標数Calabi-Yau多様体について、III2005
- Author(s)
  齋藤夏雄
- Organizer
  代数幾何学ミニワークショップ・仙台2005秋
- Place of Presentation
  代数幾何学ミニワークショップ・仙台2005秋
- Year and Date
  2005-11-08
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-17540027
[Presentation] On del Pezzo surfaces of Fermat type in positive characteristic
- Author(s)
  齋藤　夏雄
- Organizer
  第12回アフィン代数幾何学研究集会
- Place of Presentation
  関西学院大学
- Invited
- Data Source
  KAKENHI-PROJECT-24540046

1. HIROYUKI Ito (60232469)

# of Collaborated Projects: 4 results

# of Collaborated Products: 15 results
2. HIROKADO Masayuki (40316138)

# of Collaborated Projects: 3 results

# of Collaborated Products: 5 results
3. Kojima Hideo (90332824)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
4. KISHIMOTO Takashi (20372576)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
5. TAKAHASHI Takeshi (60390431)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
6. NAGAMINE Takanori

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results

SAITO Natsuo 齋藤 夏雄

齋藤 夏雄 サイトウ ナツオ

Research Projects

Research Products

Co-Researchers

Study on Fano varieties defined over an algebraically closed field in positive characteristicPrincipal Investigator

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Understanding the structure of open algebraic surfaces and normal algebraic surfaces of logarithmic Kodaira dimension one or less

Principal Investigator

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Research on algebraic varieties defined over an algebracally closed field in positive characteristicPrincipal Investigator

Principal Investigator

Project Period (FY)

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Research Institution

Toward the resolution of problems on algebraic varieties in positive characteristic

Principal Investigator

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Problems on algebraic geometry in positive characteristicPrincipal Investigator

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

Research for arithmetic and geometry of algebraic varieties including positive characteristic

Principal Investigator

Project Period (FY)

Research Category

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Research Institution

正標数の代数的閉体上定義された代数多様体の研究Principal Investigator

Principal Investigator

Project Period (FY)

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Research on arithmetic and geometry for algebraic varieties in positive characteristic.

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[Journal Article] On the multicanonical systems of quasi-elliptic surfaces2021

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[Journal Article] Three dimensional canonical singularities in codimension two in positive characteristic2013

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[Journal Article] Three dimensional canonical singularities in codimension two in positive characteristic2013

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[Journal Article] 正標数の有理二重点の変形について2011

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[Journal Article] Calabi-Yau threefolds arising from fiber products of rational quasi-elliptic surfaces, II2008

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[Journal Article] Calabi-Yau threefolds arising from fiber products of rational quasi-elliptic surfaces2008

SAITO Natsuo 齋藤夏雄

齋藤夏雄サイトウナツオ