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Hurwitz' problem through double covers of curves and curves on surfaces

Research Project

Project/Area Number 24540057
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Algebra
Research InstitutionKanagawa Institute of Technology

Principal Investigator

KOMEDA Jiryo  神奈川工科大学, 基礎・教養教育センター, 教授 (90162065)

Co-Investigator(Renkei-kenkyūsha) OHBUCHI Akira  徳島大学大学院, ソシオアーツアンドサイエンス研究部, 教授 (10211111)
Research Collaborator HARUI Takeshi  
WATANABE Kenta  
KAWAGUCHI Ryo  
TAKAHASHI Takeshi  
Project Period (FY) 2012-04-01 – 2015-03-31
Project Status Completed (Fiscal Year 2014)
Budget Amount *help
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2012: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Keywordsワイエルシュトラス半群 / 数値半群 / 代数曲線 / 二重被覆 / K3曲面 / 平面代数曲線 / 有理曲面 / K3曲面 / 平面4次曲線 / 平面5次曲線 / 平面曲線 / 2重被覆 / トーリック曲面 / アフィントーリック多様体
Outline of Final Research Achievements

A research collaboration person and I studied on the Weierstrass semigroups of ramification points on double covers of plane curves of degree 4 and three papers about this subject were published or accepted for publication. Another research collaboration person and I investigated the Weierstrass semigroups of ramification points on double covers of plane curves which can be extended to double covers of projective planes, which may have singularities (if the double covers have no singularities, then they are K3 surfaces). We submitted the paper about this topic, and the paper was accepted.
The joint work with the overseas co-investigator was publised. The title is Weierstrass semigroups on double coverings of genus 4 curves. Moreover, the co-investigator and I got the result on the Weierstrass semigroups of ramification points of double covers of plane curves of degree 5 when the genera of the double covers are larger than 17. The paper about this result is being printed at present.

Report

(4 results)
  • 2014 Annual Research Report   Final Research Report ( PDF )
  • 2013 Research-status Report
  • 2012 Research-status Report
  • Research Products

    (25 results)

All 2015 2014 2013 2012 Other

All Journal Article (17 results) (of which Peer Reviewed: 13 results,  Acknowledgement Compliant: 2 results) Presentation (8 results)

  • [Journal Article] Numerical semigroups of genus seven and double coverings of curves of genus three2015

    • Author(s)
      Takeshi Harui, Jiryo Komeda
    • Journal Title

      Semigroup Forum

      Volume: 90 Issue: 2 Pages: 491-502

    • DOI

      10.1007/s00233-014-9621-0

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Numerical semigroups which are not the Weierstrass semigroups on double covers of plane curves2015

    • Author(s)
      Jiryo Komeda
    • Journal Title

      神奈川工科大学研究報告 B 理工学編

      Volume: 39 Pages: 45-50

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Numerical semigroups of genus six and double coverings of curves of genus three2015

    • Author(s)
      Takeshi Harui, Jiryo Komeda
    • Journal Title

      Semigroup Forum

      Volume: 印刷中 Issue: 3 Pages: 601-610

    • DOI

      10.1007/s00233-014-9671-3

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed
  • [Journal Article] On extensions of a double covering of plane curves and Weierstrass semigroups of the double covering type2015

    • Author(s)
      Jiryo Komeda, Kenta Watanabe
    • Journal Title

      Semigroup Forum

      Volume: 印刷中 Issue: 2 Pages: 517-523

    • DOI

      10.1007/s00233-015-9718-0

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] The Weierstrass semigroups on double covers of genus two curves2014

    • Author(s)
      Takeshi Harui, Jiryo Komeda, Akira Ohbuchi
    • Journal Title

      Tsukuba Journal of Mathematics

      Volume: 38 Pages: 201-206

    • NAID

      120006772024

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] The proportion of numerical semigroups with no descendant or an infinite number of descendants2014

    • Author(s)
      Jiryo Komeda
    • Journal Title

      数理解析研究所講究録

      Volume: 1915 Pages: 53-57

    • Related Report
      2014 Annual Research Report
  • [Journal Article] The parents of Weierstrass semigroups and non-Weierstrass semigroups2014

    • Author(s)
      Jiryo Komeda
    • Journal Title

      数理解析研究所講究録

      Volume: 1873 Pages: 1-6

    • Related Report
      2013 Research-status Report
  • [Journal Article] Sequences of Weierstrass semigroups2014

    • Author(s)
      Jiryo Komeda
    • Journal Title

      代数幾何ミニ研究集会 2013 報告集

      Volume: 1 Pages: 95-101

    • Related Report
      2013 Research-status Report
  • [Journal Article] Weierstrass semigroups on double covers of genus four curves2014

    • Author(s)
      Seon Jeong Kim, Jiryo Komeda
    • Journal Title

      Journal of Algebra

      Volume: 405 Pages: 142-167

    • DOI

      10.1016/j.jalgebra.2014.02.006

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] Numerical semigroups and affine spaces2014

    • Author(s)
      Jiryo Komeda
    • Journal Title

      神奈川工科大学研究報告

      Volume: 38 Pages: 15-19

    • NAID

      120005436444

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] Numerical semigroups of genus eight and double coverings of curves of genus three2014

    • Author(s)
      Takeshi Harui, Jiryo Komeda
    • Journal Title

      Semigroup Forum

      Volume: 未定 Issue: 3 Pages: 571-581

    • DOI

      10.1007/s00233-014-9590-3

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] Sigma functions for a space curve of type <3,4,5>2013

    • Author(s)
      Jiryo Komeda, Shigeki Matsutani
    • Journal Title

      Journal of Geometry and Symmetry in Phisics

      Volume: 30 Pages: 75-91

    • DOI

      10.7546/jgsp-30-2013-75-91

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] The sigma functions for Weierstrass semigroups <3,7,8> and <6,13,14,15,16>2013

    • Author(s)
      Jiryo Komeda, Shigeki Matsutani, Emma Previato
    • Journal Title

      International Journal of Mathematics

      Volume: 24 Issue: 11 Pages: 1-58

    • DOI

      10.1142/s0129167x13500857

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] Double coverings of curves and non-Weierstrass semigroups2013

    • Author(s)
      Jiryo Komeda
    • Journal Title

      Communications in Algebra

      Volume: 41 Issue: 1 Pages: 312-324

    • DOI

      10.1080/00927872.2011.629324

    • Related Report
      2012 Research-status Report
    • Peer Reviewed
  • [Journal Article] Diagrams of Buchweitz numerical semigroups2013

    • Author(s)
      Jiryo Komeda
    • Journal Title

      神奈川工科大学研究報告

      Volume: B-37 Pages: 11-15

    • Related Report
      2012 Research-status Report
    • Peer Reviewed
  • [Journal Article] The fractional map by two and the parent map of numerical semigroups2012

    • Author(s)
      Jiryo Komeda
    • Journal Title

      数理解析研究所講究録

      Volume: 1809 Pages: 198-204

    • Related Report
      2012 Research-status Report
  • [Journal Article] Weierstrass gap sequences at points of curves on some rational surfaces2012

    • Author(s)
      Jiryo Komeda, Akira Ohbuchi
    • Journal Title

      Tsukuba Journal of Mathematics

      Volume: 36 Pages: 217-233

    • NAID

      120006582861

    • Related Report
      2012 Research-status Report
    • Peer Reviewed
  • [Presentation] Curves on double sextics and Weierstrass semigroups2015

    • Author(s)
      Jiryo Komeda
    • Organizer
      代数幾何ミニ研究集会
    • Place of Presentation
      埼玉大学(さいたま市)
    • Year and Date
      2015-03-11
    • Related Report
      2014 Annual Research Report
  • [Presentation] Quasi-symmetric numerical semigroups and double covers of curves2015

    • Author(s)
      Jiryo Komeda
    • Organizer
      「代数系・論理・言語と計算機科学の新たな接点」研究集会
    • Place of Presentation
      京都大学数理解析研究所(京都市)
    • Year and Date
      2015-02-16
    • Related Report
      2014 Annual Research Report
  • [Presentation] Weierstrass semigroups on double covers of plane curves2014

    • Author(s)
      Jiryo Komeda
    • Organizer
      International Research Meeting "Semigroups, Languages and Algebras"
    • Place of Presentation
      秋田大学(秋田市)
    • Year and Date
      2014-08-07
    • Related Report
      2014 Annual Research Report
  • [Presentation] Hurwitz's problem and symmetric numerical semigroups2014

    • Author(s)
      Jiryo Komeda
    • Organizer
      Kyoto Mini Workshop 2014
    • Place of Presentation
      京都産業大学(京都市)
    • Year and Date
      2014-08-02
    • Related Report
      2014 Annual Research Report
  • [Presentation] The proportion of numerical semigroups with no descendant or an infinite number of descendants2014

    • Author(s)
      Jiryo Komeda
    • Organizer
      「計算機科学における論理・代数・言語」研究集会
    • Place of Presentation
      京都大学数理解析研究所
    • Related Report
      2013 Research-status Report
  • [Presentation] The parents of Weierstrass semigroups and non-Weierstrass semigroups

    • Author(s)
      米田 二良
    • Organizer
      京都大学数理解析研究所研究集会「代数とコンピュータサイエンス」
    • Place of Presentation
      京都大学数理解析研究所
    • Related Report
      2012 Research-status Report
  • [Presentation] Weierstrass numerical semigroups and affine toric varieties

    • Author(s)
      米田二良
    • Organizer
      第11回アフィン代数幾何学研究集会
    • Place of Presentation
      関西学院大学大阪梅田キャンパス
    • Related Report
      2012 Research-status Report
  • [Presentation] Sequences of Weierstrass semigroups

    • Author(s)
      米田二良
    • Organizer
      代数幾何ミニ研究集会
    • Place of Presentation
      埼玉大学
    • Related Report
      2012 Research-status Report

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Published: 2013-05-31   Modified: 2019-07-29  

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