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Study of the continuations and the spans of an open Riemann surface in view of the thory of functions of several complex variables

Research Project

Project/Area Number 15K04930
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Basic analysis
Research InstitutionHiroshima University

Principal Investigator

SHIBA Masakazu  広島大学, 工学研究科, 名誉教授 (70025469)

Co-Investigator(Kenkyū-buntansha) 濱野 佐知子  大阪市立大学, 大学院理学研究科, 准教授 (10469588)
山口 博史  滋賀大学, 教育学部, 名誉教授 (20025406)
増本 誠  山口大学, 大学院創成科学研究科, 教授 (50173761)
Project Period (FY) 2015-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywordsリーマン面 / 等角的埋め込み / 流体力学的微分 / 周期行列 / ジーゲル上半空間 / スパン / 擬凸状領域 / 変分公式 / 接続 / 開トーラス / 開リーマン面の変形 / 双曲的スパン / リーマン面の接続 / 開トーラスの正則族 / Closings / 開リーマン面の接続 / 劣調和函数 / リーマン面の等角的埋め込み
Outline of Final Research Achievements

In our studies preceding the present project we observed the set of all tori into which a given open torus (= an open Riemann surface of genus one) can be conformally embedded and reached the notion of hyperbolic span of the open torus. It can be viewed as a domain functon so that we have a new problem of studying its dependence on the open torus. One of the main results in this project reads: If a family of open bordered tori varying with the parameter in the unit disk forms a pseudoconvex domain in a two-dimensional complex manifold, then the hyperbolic span is a subharmonic function on the unit disk. A condition for the hyperbolic span to be a harmonic function is also given. Some additional results were obtained in this project, which would be useful to generalize the above mentioned theorem to any open Riemann surfaces of finite genus. We studied in particular the period matrices of holomorphic hydrodynamic differentials on such surfaces and obtained a new type of span.

Academic Significance and Societal Importance of the Research Achievements

開トーラスが1つだけではなく複素径数とともに変化するとき,個々の開トーラスの双曲的スパンが径数領域上の実数値関数として得られるわけだが,その動きを知ることは非常に興味深い(西野 利雄氏の指摘).私たちの主成果は,少なくとも種数が1の場合においてこの指摘を具体的に定式化し証明したことで,その意義は大きい.
同様の問題を種数が高い開リーマン面についても扱うために,正則な流体力学的微分が定める周期行列を新しい視点に立って定義・考察し古典的周期行列との類似性や相違点を詳しく調べたが,これは従来行われてこなかった研究の方法で意義深い.たとえばその応用のひとつとして新しい型のスパンの概念が得られた.

Report

(5 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • 2015 Research-status Report
  • Research Products

    (63 results)

All 2020 2019 2018 2017 2016 2015

All Journal Article (5 results) (of which Peer Reviewed: 5 results,  Acknowledgement Compliant: 2 results) Presentation (58 results) (of which Int'l Joint Research: 22 results,  Invited: 43 results)

  • [Journal Article] Holomorphic mappings of once-holed tori, II2020

    • Author(s)
      Masumoto, Makoto
    • Journal Title

      Journal d'Analyse Mathematique

      Volume: 印刷中

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Holomorphic mappings of once-holed tori, II2018

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

      J. d'Anal. Math.

      Volume: 印刷中

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Hyperbolic span and pseudoconvexity2017

    • Author(s)
      Sachiko Hamano, Masakazu Shiba and Hiroshi Yamaguchi
    • Journal Title

      Kyoto J.Math.

      Volume: 57 Issue: 1 Pages: 165-183

    • DOI

      10.1215/21562261-3759558

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Holomorphic mappings of once-holed tori2016

    • Author(s)
      Makoto Masumoto
    • Journal Title

      Journal d'Analyse Mathematique

      Volume: 129 Issue: 1 Pages: 69-90

    • DOI

      10.1007/s11854-016-0015-y

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Log-plurisubharmonicity of metric deformations induced by Schiffer and harmonic spans2016

    • Author(s)
      Sachiko HAMANO
    • Journal Title

      Mathematische Zeitschrift

      Volume: 印刷中 Issue: 1-2 Pages: 491-505

    • DOI

      10.1007/s00209-016-1663-4

    • Related Report
      2015 Research-status Report
    • Peer Reviewed
  • [Presentation] 対称水平截線領域のSchiffer spanの動き2019

    • Author(s)
      伊藤 雅明・米谷 文男・柴 雅和
    • Organizer
      日本数学会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Variation formulas of the hyperbolic spans in the pseudoconvex domain2019

    • Author(s)
      山口 博史
    • Organizer
      東北複素解析セミナー
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] 種数1のある開リーマン面の擬凸変動に対する同時一意化について2019

    • Author(s)
      濱野 佐知子
    • Organizer
      東北複素解析セミナー
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] 開リーマン面のclosings --- 周期行列の複素正規化と方向モジュラスおよびそれらの応用2018

    • Author(s)
      柴 雅和
    • Organizer
      日本数学会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Closings and the Span of an Open Riemann Surface of Finite Genus2018

    • Author(s)
      Shiba, Masakazu
    • Organizer
      Prospects of Theory of Riemann Surfaces
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] On uniqueness of compact continuations of Riemann surfaces2018

    • Author(s)
      Hamano, Sachiko
    • Organizer
      Hong Kong Geometry Colloquium
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 有限種数開リーマン面のa-スパンと擬凸領域,2018

    • Author(s)
      濱野 佐知子
    • Organizer
      名城大学・ポテンシャル論セミナー
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] Variational formulas for hydrodynamic differentials and its application,2018

    • Author(s)
      Hamano, Sachiko
    • Organizer
      The 12th AIMS Conference on Dynamical Systems, Differential Equations and Applications
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Pseudoconvex domains fibered by open Riemann surfaces of the same topological type,2018

    • Author(s)
      濱野 佐知子
    • Organizer
      研究集会「リーマン面に関連する位相幾何学
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] Pseudoconvex domains fibered by open Riemann surfaces of the same topological typ2018

    • Author(s)
      Hamano, Sachiko
    • Organizer
      New Trends in Teichmüller Theory and Mapping Class Groups
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Variational formulas for hydrodynamic differentials and its application2018

    • Author(s)
      Hamano, Sachiko
    • Organizer
      102e rencontre entre mathématiciens et physiciens théoriciens (Institut de Recherche Mathématique Avancée
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 流体力学的微分の変分公式とその応用について2018

    • Author(s)
      濱野 佐知子
    • Organizer
      研究集会「Geometry of Riemann surfaces and related topics」
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] 流体力学的微分の変分公式とその応用について2018

    • Author(s)
      濱野 佐知子
    • Organizer
      平成30年度 等角写像論・値分布論研究集会
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] Variation of the a-span of an open Riemann surface and pseudoconvexity2018

    • Author(s)
      Hamano, Sachiko
    • Organizer
      Complex Analytic Geometry Seminar
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Weldings of Riemann surfaces with quadratic differentials2018

    • Author(s)
      増本 誠
    • Organizer
      東工大複素解析セミナー
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] リーマン面の等角的埋め込み2018

    • Author(s)
      増本 誠
    • Organizer
      香川セミナー
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] Ioffe rays of spaces of compact continuations of Riemann surfaces2018

    • Author(s)
      増本 誠
    • Organizer
      名城大学ポテンシャル論セミナー
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] On uniqueness of compact continuations of Riemann surfaces2018

    • Author(s)
      Masumoto, Makoto
    • Organizer
      Prospects of theory of Riemann surfaces
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Variation of the a-span of an open Riemann surface and pseudoconvexity2018

    • Author(s)
      濱野 佐知子
    • Organizer
      リーマン面・不連続群論研究集会,名古屋大学,2018年2月10日~12日
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] 有限種数開リーマン面のa-スパンと擬凸領域2018

    • Author(s)
      濱野 佐知子,柴 雅和,山口 博史
    • Organizer
      日本数学会,東京大学,2018年3月18日~3月21日
    • Related Report
      2017 Research-status Report
  • [Presentation] Measured foliations and compact continuations of Riemann surfaces2018

    • Author(s)
      増本 誠
    • Organizer
      リーマン面・不連続群論研究集会,名古屋大学,2018年2月10日~12日 (2月11日
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] 双曲空間におけるPoiseuille流の構成2018

    • Author(s)
      幡谷 泰史, 伊藤 雅明, 柴 雅和
    • Organizer
      日本数学会中四国支部例会,2018年1月21日,山口大学
    • Related Report
      2017 Research-status Report
  • [Presentation] The period matrices of the closings of an open Riemann surface of finite genus2017

    • Author(s)
      Masakazu Shiba
    • Organizer
      リーマン面・不連続群論研究集会(Riemann surfaces and Discontinuous groups)
    • Place of Presentation
      東北大学・片平さくらホール(仙台市)
    • Year and Date
      2017-01-07
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] The period matrices of the closings of an open Riemann surface of finite genus2017

    • Author(s)
      Shiba, M.
    • Organizer
      Riemann Surfaces and Discontinuous Groups,January 7-9, 2017.Tohoku Univ.
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 開リーマン面の閉リーマン面への等角的埋め込み --- Closingsと流体力学的周期行列2017

    • Author(s)
      柴 雅和,山口 博史
    • Organizer
      日本数学会,2017年9月11日, 山形大学
    • Related Report
      2017 Research-status Report
  • [Presentation] 複素速度ポテンシャルとリーマン面のclosings2017

    • Author(s)
      柴 雅和
    • Organizer
      名城大学ポテンシャル論セミナー,2017年12月8日, 名城大学
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] 流体力学的微分の2階変分公式とその応用について2017

    • Author(s)
      濱野 佐知子
    • Organizer
      名城大学ポテンシャル論セミナー,2017年6月16日, 名城大学
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] Variation of the moduli disk for an open Riemann surface of finite genus2017

    • Author(s)
      Hamano, S.
    • Organizer
      Geometry and its applications seminar on complex analytic geometry, Pohang University of Science and Technology,June 30, 201
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Variation of the moduli disk for closings of an open torus under pseudoconvexity2017

    • Author(s)
      Hamano, S.
    • Organizer
      Seminar at Institute for Advanced Mathematical Research,University of Strasbourg, September 5, 2017
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Variational formulas for hydrodynamic differentials and pseudoconvexity2017

    • Author(s)
      Hamano, S.
    • Organizer
      Several Complex Variables; International Scientific Conference dedicated to the centennial of B.V. Shabat,Siberian Federal University, September 11-15, 2017
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 有限種数開リーマン面のa-スパンと擬凸領域2017

    • Author(s)
      濱野 佐知子
    • Organizer
      リーマン面論研究会, 大塚公民館・広島オフィスセンター,2017年12月18日~12月20日
    • Related Report
      2017 Research-status Report
  • [Presentation] Compact continuations of Riemann surfaces2017

    • Author(s)
      Masumoto, M.
    • Organizer
      Bilateral mini-workshop of NTNU and Yamaguchi University on mathematics and its applications 2017年12月25日
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Spaces of compact continuations of Riemann surfaces2017

    • Author(s)
      Masumoto, M. and M. Shiba
    • Organizer
      Prospects of theory of Riemann surfaces , 2017年12月1日
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Compact continuations, quadratic differentials and measured foliations2017

    • Author(s)
      増本 誠
    • Organizer
      名城大学ポテンシャル論セミナー,2017年10月27日, 名城大学
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] Measured foliations and compact continuations of Riemann surfaces2017

    • Author(s)
      増本 誠
    • Organizer
      大阪市立大学複素解析セミナー,2017年11月20日
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] Conformal embeddings of Riemann surfaces2016

    • Author(s)
      Tomomi Gouma, Makoto Masumoto, Masakazu Shiba
    • Organizer
      研究集会「Prospects of theory of Riemann surfaces」
    • Place of Presentation
      山口大学理学部(山口市)
    • Year and Date
      2016-12-02
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] The moduli set of closings of an open Riemann surface2016

    • Author(s)
      濱野 佐知子
    • Organizer
      Prospects of Theory of Riemann surfaces
    • Place of Presentation
      Yamaguchi University(山口市)
    • Year and Date
      2016-12-02
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 流体力学的微分の変分公式とその応用について2016

    • Author(s)
      濱野 佐知子
    • Organizer
      第59回函数論シンポジウム
    • Place of Presentation
      静岡県男女共同参画センターあざれあ(静岡市)
    • Year and Date
      2016-10-08
    • Related Report
      2016 Research-status Report
    • Invited
  • [Presentation] 開リーマン面の閉リーマン面への等角的埋め込み--- 周期行列の値域 ---2016

    • Author(s)
      柴 雅和, 山口 博史
    • Organizer
      日本数学会2016年度秋季総合分科会 函数論分科会
    • Place of Presentation
      関西大学(吹田市)
    • Year and Date
      2016-09-15
    • Related Report
      2016 Research-status Report
  • [Presentation] 有限種数の開リーマン面が誘導するモジュライ円板と擬凸領域2016

    • Author(s)
      濱野 佐知子, 柴 雅和, 山口 博史
    • Organizer
      日本数学会2016年度秋季総合分科会 函数論分科会
    • Place of Presentation
      関西大学(吹田市)
    • Year and Date
      2016-09-15
    • Related Report
      2016 Research-status Report
  • [Presentation] Variational formulas for hydrodynamic differentials2016

    • Author(s)
      濱野 佐知子
    • Organizer
      Workshop on Grothendieck-Teichmüller Theorie
    • Place of Presentation
      Chern Institute of Mathematics, Nankai University, CHINA
    • Year and Date
      2016-07-25
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Variational formulas for hydrodynamic differentials and application2016

    • Author(s)
      濱野 佐知子
    • Organizer
      The 11th Korean Conference in Several Complex Variables
    • Place of Presentation
      The Kolon Hotel in Gyeong-Ju, KOREA
    • Year and Date
      2016-07-04
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] 双曲的スパンと擬凸状領域2016

    • Author(s)
      山口 博史 (濱野 佐知子,柴 雅和)
    • Organizer
      相川弘明先生還暦記念研究集会
    • Place of Presentation
      北海道大学理学部
    • Year and Date
      2016-02-01
    • Related Report
      2015 Research-status Report
    • Invited
  • [Presentation] 複素速度ポテンシャルと開リーマン面のclosings2016

    • Author(s)
      柴 雅和
    • Organizer
      北海道大学月曜解析セミナー
    • Place of Presentation
      北海道大学(札幌市)
    • Related Report
      2016 Research-status Report
  • [Presentation] Variational formulas for hydrodynamic differentials and the application2016

    • Author(s)
      濱野 佐知子
    • Organizer
      大阪市立大学数学研究所談話会
    • Place of Presentation
      大阪市立大学(大阪市)
    • Related Report
      2016 Research-status Report
    • Invited
  • [Presentation] 種数有限の開リーマン面が誘導するユークリッドスパンと擬凸領域2016

    • Author(s)
      濱野 佐知子
    • Organizer
      東大数理・複素解析幾何セミナー
    • Place of Presentation
      東大数理駒場キャンパス(東京都)
    • Related Report
      2016 Research-status Report
    • Invited
  • [Presentation] Spaces of compact continuations of Riemann surfaces2016

    • Author(s)
      増本 誠
    • Organizer
      南京大学数学系学術報告
    • Place of Presentation
      南京大学 (中華人民共和国南京市)
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Once-holed tori embedded in Riemann surfaces2016

    • Author(s)
      増本 誠
    • Organizer
      数学与信息技術学院学術報告
    • Place of Presentation
      江蘇第二師範学院(中華人民共和国南京市)
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Holomorphic mappings of once-holed tori2016

    • Author(s)
      増本 誠
    • Organizer
      数学科学学院学術報告
    • Place of Presentation
      南京師範大学 (中華人民共和国南京市)
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 流体力学的微分の変分公式とその応用について,2015

    • Author(s)
      濱野佐知子
    • Organizer
      2015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数学教室
    • Year and Date
      2015-12-27
    • Related Report
      2015 Research-status Report
    • Invited
  • [Presentation] The period matrices of the closings2015

    • Author(s)
      Masakazu SHIBA
    • Organizer
      平成27年度等角写像論・値分布論研究集会
    • Place of Presentation
      山口大学理学部
    • Year and Date
      2015-12-05
    • Related Report
      2015 Research-status Report
    • Invited
  • [Presentation] リーマン面の"closings" ---平面領域に関する古典的問題とその多変数函数論的な意義2015

    • Author(s)
      柴 雅和 (濱野 佐知子,山口 博史)
    • Organizer
      第58回函数論シンポジウム
    • Place of Presentation
      松江市
    • Year and Date
      2015-10-11
    • Related Report
      2015 Research-status Report
    • Invited
  • [Presentation] Variational formula for $L_s$-canonical semi-exact differential and application,2015

    • Author(s)
      濱野佐知子
    • Organizer
      日本数学会2015年度季総合分科会
    • Place of Presentation
      京都産業大学
    • Year and Date
      2015-09-15
    • Related Report
      2015 Research-status Report
  • [Presentation] Variational formulas for canonical differentials and application,2015

    • Author(s)
      Sachiko HAMANO
    • Organizer
      The 23rd International Conference on Finite or Infinite Dimensional Complex
    • Place of Presentation
      九州産業大学(福岡市)
    • Year and Date
      2015-08-26
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] Spaces of compact continuations of Riemann surfaces2015

    • Author(s)
      Makoto MASUMOTO
    • Organizer
      2015 年全国多複変学術年会
    • Place of Presentation
      東呉開元名都酒店(中華人民共和国湖州市)
    • Year and Date
      2015-08-26
    • Related Report
      2015 Research-status Report
    • Invited
  • [Presentation] Holomorphic mappings of once-holed tori2015

    • Author(s)
      Makoto MASUMOTO
    • Organizer
      中国科学技術大学 (中華人民共和国合肥市)
    • Place of Presentation
      中国科学技術大学 (中華人民共和国合肥市)
    • Year and Date
      2015-08-19
    • Related Report
      2015 Research-status Report
    • Invited
  • [Presentation] Holomorphic mappings of once-holed tori2015

    • Author(s)
      増本 誠
    • Organizer
      ポテンシャル論セミナー
    • Place of Presentation
      名城大学理工学部
    • Year and Date
      2015-06-19
    • Related Report
      2015 Research-status Report
    • Invited
  • [Presentation] Variational formulas for canonical differentials and application,2015

    • Author(s)
      濱野佐知子
    • Organizer
      東大数理・複素解析幾何セミナー,
    • Place of Presentation
      東京大学大学院数理科学研究科
    • Year and Date
      2015-04-27
    • Related Report
      2015 Research-status Report
    • Invited

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Published: 2015-04-16   Modified: 2020-03-30  

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