YAMAGATA Saeko

Affiliation

College of Education, Department of School Education , Specialization in Mathematics Education

Job Title

Associate Professor

Mail Address

E-mail address

Related SDGs




ORCID  https://orcid.org/0000-0002-8389-0445

The Best Research Achievement in Research Career 【 display / non-display

  • 【Published Thesis】 Notes on relatively hyperbolic groups and relatively quasiconvex subgroups.  2015

    【Published Thesis】 Commensurators of surface braid groups.  2011

    【Published Thesis】 The girth of convergence groups and mapping class groups.  2011

The Best Research Achievement in the last 5 years 【 display / non-display

  • 【Published Thesis】 On Relative Hyperbolicity for a Group and Relative Quasiconvexity for a Subgroup  2019.06

Degree 【 display / non-display

  • Doctor of Science

Campus Career 【 display / non-display

  • 2021.4
     
     

    Duty   Yokohama National UniversityCollege of Education   Department of School Education   Specialization in Mathematics Education   Associate Professor  

  • 2017.4
    -
    2021.3

    Duty   Yokohama National UniversityCollege of Education   Department of School Education   Specialization in Mathematics Education   Associate Professor  

  • 2014.4
    -
    2017.3

    Duty   Yokohama National UniversityCollege of Education and Human Sciences   Department of School Education   Specialization in Mathematics Education   Associate Professor  

  • 2012.4
    -
    2014.3

    Duty   Yokohama National UniversityCollege of Education and Human Sciences   Department of School Education   Specialization in Mathematics Education   Lecturer  

  • 2021.4
     
     

    Concurrently   Yokohama National UniversityInterfaculty Graduate School of Innovative and Practical Studies   Associate Professor  

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Papers 【 display / non-display

  • On Relative Hyperbolicity for a Group and Relative Quasiconvexity for a Subgroup

    Matsuda Yoshifumi, Oguni Shin-ichi, Yamagata Saeko

    TOKYO JOURNAL OF MATHEMATICS   42 ( 1 )   83 - 112   2019.6  [Reviewed]

    DOI Web of Science

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Joint Work  

  • Notes on relatively hyperbolic groups and relatively quasiconvex subgroups

    Yoshifumi Matsuda, Shin-ichi Oguni, Saeko Yamagata

    38   99 - 123   2015.6  [Reviewed]

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    Language:English   Publishing type:Research paper (scientific journal)   Joint Work  

  • Automorphisms of the Torelli complex for the one-holed genus two surface

    Yoshikata Kida, Saeko Yamagata

    37   335 - 372   2014.12  [Reviewed]

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    Language:English   Publishing type:Research paper (scientific journal)   Joint Work  

  • The universal relatively hyperbolic structure on a group and relative quasiconvexity for subgroups

    Yoshifumi Matsuda, Shin-ichi Oguni, Saeko Yamagata

    Analysis and geometry of discrete groups and hyperbolic spaces, RIMS Kôkyûroku Bessatsu   B48   73 - 93   2014.6  [Reviewed]  [Invited]

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    Language:English   Publishing type:Research paper (scientific journal)   Joint Work  

  • C^*-simplicity for groups with non-elementary convergence group actions

    Yoshifumi Matsuda, Shin-ichi Oguni, and Saeko Yamagata

    39   1291 - 1299   2013.11  [Reviewed]

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    Language:English   Publishing type:Research paper (scientific journal)   Joint Work  

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Review Papers 【 display / non-display

  • 曲面上の組み紐群が作用する複体の自己同型について

    山形紗恵子

    数理解析研究所講究録   1728   32 - 39   2011.2

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    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (scientific journal)   Single Work  

  • Coxeter 群の境界について

    山形紗恵子

    城崎新人セミナー報告集   25 - 28   2006.6

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    Language:Japanese   Publishing type:Meeting report   Single Work  

  • On boundaries of some Coxeter groups

    山形紗恵子

    数理解析研究所講究録   1492   37 - 42   2006.5

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    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (scientific journal)   Single Work  

Awards 【 display / non-display

  • 川井賞

    2003.3   財団法人川井数理科学財団  

    Individual or group name of awards:山形紗恵子

  • ヨシ・エス・クノ奨学賞

    2000.6   東北大学  

    Individual or group name of awards:山形紗恵子

  • 青葉理学振興会奨励賞

    2000.3   青葉理学振興会  

    Individual or group name of awards:山形紗恵子

Grant-in-Aid for Scientific Research 【 display / non-display

  • 群の相対的双曲構造

    2015.4 - 2020.3

    科学研究費補助金  Grant-in-Aid for Young Scientists(B)

    Investigator(s):山形紗恵子

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    Grant type:Competitive

Other external funds procured 【 display / non-display

  • 負曲率空間への分枝ランダムウォークの挙動の研究

    2023.4 - 2024.3

    研究環境整備支援費

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    Authorship:Principal investigator 

  • 負曲率空間上の分枝ランダムウォークの研究

    2021.4 - 2022.3

    学長戦略経費(若手研究者の研究活動支援分)

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    Authorship:Principal investigator 

Presentations 【 display / non-display

  • 群の相対的双曲性について

    山形紗恵子  [Invited]

    Rigidity seminar 

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    Event date: 2013.10

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:名古屋大学  

  • Torelli 複体の自己同型について

    山形紗恵子  [Invited]

    距離の幾何学探求勉強会 

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    Event date: 2013.3

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:琵琶湖コンファレンスセンター  

  • Commensurators of surface braid groups

     [Invited]

    Rigidity School, Tokyo 2011/2012 

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    Event date: 2012.3

    Language:English   Presentation type:Oral presentation (invited, special)  

  • Relatively hyperbolic structures on groups

     [Invited]

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    Event date: 2011.10

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

  • Relatively hyperbolic structures on groups

     [Invited]

    Probability and Geometry 

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    Event date: 2011.9

    Language:English   Presentation type:Oral presentation (invited, special)  

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Charge of on-campus class subject 【 display / non-display

  • 2024   Topics in Geometry Ⅱ

    Interfaculty Graduate School of Innovative and Practical Studies

  • 2024   Topics in Geometry Ⅰ

    Interfaculty Graduate School of Innovative and Practical Studies

  • 2024   Senior Thesis / Projects

    College of Education

  • 2024   Project Studies B (Seminar)

    College of Education

  • 2024   Geometry Ⅲ

    College of Education

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Committee Memberships 【 display / non-display

  • 日本数学会総会

    2022.3 - 2023.2  2022年度日本数学会地方区代議員

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    Committee type:Academic society 

Social Contribution(Extension lecture) 【 display / non-display

  • 高校生インターンシップ

    Role(s): Lecturer

    横浜国立大学  2018.8

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    Audience: High school students

    Type:Extension Lecture

  • 高校生インターンシップ

    Role(s): Lecturer

    横浜国立大学  2017.8

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    Audience: High school students

    Type:Extension Lecture