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Approach to huge graph analysis using graph coverings

Research Project

Project/Area Number 19H01803
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 12030:Basic mathematics-related
Research InstitutionYokohama National University

Principal Investigator

Negami Seiya  横浜国立大学, 大学院環境情報研究院, 非常勤教員 (40164652)

Co-Investigator(Kenkyū-buntansha) 小関 健太  横浜国立大学, 大学院環境情報研究院, 准教授 (10649122)
中本 敦浩  横浜国立大学, 大学院環境情報研究院, 教授 (20314445)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥8,710,000 (Direct Cost: ¥6,700,000、Indirect Cost: ¥2,010,000)
Fiscal Year 2021: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2020: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2019: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Keywords位相幾何学的グラフ理論 / 閉曲面上のグラフ / 被覆グラフ / 平面被覆予想 / ボルテージグラフ / 群作用 / ボルテージ・グラフ / グラフの埋め込み / 巨大グラフ / ビッグデータ解析
Outline of Research at the Start

いわゆるビッグデータが形成するネットワークの解析にグラフ理論が応用されることが多いが,探索すべき不変量や構造によっては合理的な時間内に計算結果を得られない場合が多い。この状況を克服するために,位相幾何学的グラフ理論において長年研究されてきた「被覆グラフ」の概念を利用して,基底となる小さなグラフの解析を基にして,それを被覆する巨大なグラフの解析を可能にする理論を構築し,近似的な高速計算アルゴリズムを開発する。

Outline of Final Research Achievements

A graph is a figure consisting of several points and lines joining them, which looks like a network. There is a method called “graph covering” to make a huge graph from a small graph, which has been discussed in algebraic topology and in graph theory separately. We investigated the consistency between those two theories and unified them. As an application of our theory, we proved a theorem which proposes a new approach to a famous open problem called "Planar Cover Conjecture".

Academic Significance and Societal Importance of the Research Achievements

被覆グラフの今後の研究の礎となる理論が構築できたことに学術的な意義がある。いわゆるビッグデータは個々のデータの関連性をリンクとする巨大なネットワークを構成していることが多い。その巨大なネットワークを解析する際に,それを被覆グラフで近似することで,それが被覆する小さなネットワークの解析に読み替えることができる。本研究で確立した理論はそうした解析を行う上での基盤となることが期待される。

Report

(4 results)
  • 2022 Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • Research Products

    (63 results)

All 2023 2022 2021 2020 2019 2018 Other

All Journal Article (26 results) (of which Int'l Joint Research: 9 results,  Peer Reviewed: 26 results,  Open Access: 16 results) Presentation (33 results) (of which Int'l Joint Research: 5 results,  Invited: 4 results) Book (1 results) Remarks (2 results) Funded Workshop (1 results)

  • [Journal Article] Flippable edges in triangulations on surfaces2023

    • Author(s)
      D. Ikegami and A. Nakamoto
    • Journal Title

      Discuss. Math. Graph Theory

      Volume: 42 Issue: 4 Pages: 1041-1059

    • DOI

      10.7151/dmgt.2377

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Generating punctured surface triangulations with degree at least 42022

    • Author(s)
      Chavez Maria-Jose、Negami Seiya、Quintero Antonio、Villar-Linan Maria Trinidad
    • Journal Title

      Analele Universitatii "Ovidius" Constanta - Seria Matematica

      Volume: 30 Issue: 1 Pages: 129-151

    • DOI

      10.2478/auom-2022-0008

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Note on graph coverings with voltage assignments2022

    • Author(s)
      Negami Seiya, Sato Iwao
    • Journal Title

      Yokohama Mathematical Journal

      Volume: 68 Pages: 109-126

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] An Even 2-Factor in the Line Graph of a Cubic Graph2022

    • Author(s)
      SeungJae Eom, Kenta Ozeki
    • Journal Title

      Theory and Applications of Graphs

      Volume: 9 Issue: 1 Pages: 7-7

    • DOI

      10.20429/tag.2022.090107

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] The Alon-Tarsi number of K5-minor-free graphs2022

    • Author(s)
      Abe Toshiki、Kim Seog-Jin、Ozeki Kenta
    • Journal Title

      Discrete Mathematics

      Volume: 345 Issue: 4 Pages: 112764-112764

    • DOI

      10.1016/j.disc.2021.112764

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Covering projective planar graphs with three forests2022

    • Author(s)
      Mukae Raiji、Ozeki Kenta、Sano Terukazu、Tazume Ryuji
    • Journal Title

      Discrete Mathematics

      Volume: 345 Issue: 4 Pages: 112748-112748

    • DOI

      10.1016/j.disc.2021.112748

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Quadrangulations of a Polygon with Spirality2021

    • Author(s)
      Hidaka Fumiya、Matsumoto Naoki、Nakamoto Atsuhiro
    • Journal Title

      Graphs and Combinatorics

      Volume: 37 Issue: 5 Pages: 1905-1912

    • DOI

      10.1007/s00373-021-02346-1

    • Related Report
      2021 Annual Research Report 2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Y-equivalence and rhombic realization of projective-planar quadrangulations2021

    • Author(s)
      A. Nakamoto and Y. Omizo
    • Journal Title

      Discrete Appl. Math.

      Volume: 299 Pages: 98-112

    • DOI

      10.1016/j.dam.2021.04.026

    • Related Report
      2021 Annual Research Report 2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Hamiltonicity of Graphs on Surfaces in?Terms of Toughness and Scattering Number ? A Survey2021

    • Author(s)
      Ozeki Kenta
    • Journal Title

      Springer. Lect. Notes Comput. Sci.

      Volume: 13034 Pages: 74-95

    • DOI

      10.1007/978-3-030-90048-9_7

    • ISBN
      9783030900472, 9783030900489
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Proper Colorings of Plane Quadrangulations Without Rainbow Faces2021

    • Author(s)
      Enami Kengo、Ozeki Kenta、Yamaguchi Tomoki
    • Journal Title

      Graphs and Combinatorics

      Volume: 37 Issue: 5 Pages: 1873-1890

    • DOI

      10.1007/s00373-021-02350-5

    • Related Report
      2021 Annual Research Report 2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The Color Number of Cubic Graphs Having a Spanning Tree with a Bounded Number of Leaves2021

    • Author(s)
      Malnegro Analen A、Malacas Gina、Ozeki Kenta
    • Journal Title

      Theory and Applications of Graphs

      Volume: 8 Issue: 2

    • DOI

      10.20429/tag.2021.080201

    • Related Report
      2021 Annual Research Report 2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] 2-Factors of cubic bipartite graphs2021

    • Author(s)
      Haghparast Nastaran、Ozeki Kenta
    • Journal Title

      Discrete Mathematics

      Volume: 344 Issue: 7 Pages: 112357-112357

    • DOI

      10.1016/j.disc.2021.112357

    • Related Report
      2021 Annual Research Report 2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] N-flips in triangulations with two odd degree vertices2020

    • Author(s)
      Y. Asayama, R. Matsukawa, N. Matsumoto and A. Nakamoto
    • Journal Title

      Graphs Combin. 36 (2020), 469--490

      Volume: 36 Issue: 3 Pages: 469-490

    • DOI

      10.1007/s00373-019-02130-2

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Rhombus tilings of an even-sided polygon and quadrangulations on the projective plane2020

    • Author(s)
      H. Hamanaka, A. Nakamoto and Y. Suzuki
    • Journal Title

      Graphs Combin. 36 (2020), 561\UTF{2013}571.

      Volume: 36 Issue: 3 Pages: 561-571

    • DOI

      10.1007/s00373-020-02137-0

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Diagonal flips in plane graphs with triangular and quadrangular faces2020

    • Author(s)
      N. Matsumoto, A. Nakamoto and S. Negami20
    • Journal Title

      Discrete Appl. Math.

      Volume: 283 Pages: 292-305

    • DOI

      10.1016/j.dam.2020.01.007

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Long Paths in Bipartite Graphs and Path-Bistar Bipartite Ramsey Numbers2020

    • Author(s)
      Michitaka Furuya, Shunichi Maezawa, Kenta Ozeki
    • Journal Title

      Graphs and Combinatorics

      Volume: 36 Issue: 1 Pages: 167-176

    • DOI

      10.1007/s00373-019-02127-x

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Thomassen’s conjecture for line graphs of 3-hypergraphs2020

    • Author(s)
      Li Binlong、Ozeki Kenta、Ryjcek Zdenek、Vrana Petr
    • Journal Title

      Discrete Mathematics

      Volume: 343 Issue: 6 Pages: 111838-111838

    • DOI

      10.1016/j.disc.2020.111838

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Orientations of graphs avoiding given lists on out‐degrees2020

    • Author(s)
      Akbari S.、Dalirrooyfard M.、Ehsani K.、Ozeki K.、Sherkati R.
    • Journal Title

      Journal of Graph Theory

      Volume: 93 Issue: 4 Pages: 483-502

    • DOI

      10.1002/jgt.22498

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] On minimum leaf spanning trees and a criticality notion2020

    • Author(s)
      Ozeki Kenta、Wiener Gabor、Zamfirescu Carol T.
    • Journal Title

      Discrete Mathematics

      Volume: 343 Issue: 7 Pages: 111884-111884

    • DOI

      10.1016/j.disc.2020.111884

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Recursive Formulas for Beans Functions of Graphs2020

    • Author(s)
      Kengo Enami and Seiya Negami
    • Journal Title

      Theory and Applications of Graphs

      Volume: 7 Issue: 1 Pages: 1-11

    • DOI

      10.20429/tag.2020.070103

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] A complete bipartite graph without properly colored cycles of length four2019

    • Author(s)
      Cada Roman、Ozeki Kenta、Yoshimoto Kiyoshi
    • Journal Title

      Journal of Graph Theory

      Volume: 93 Issue: 2 Pages: 168-180

    • DOI

      10.1002/jgt.22480

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Stable embeddings on closed surfaces with respect to the minimum length2019

    • Author(s)
      Naoki Mochizuki, Seiya Negami
    • Journal Title

      Acta Mathematica Universitatis Comenianae

      Volume: 88 Pages: 293-304

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A generating theorem of punctured surface triangulations with inner degree at least 42019

    • Author(s)
      Maria-Jose Chavez, Seiya Negami, Antonio Quintero, Maria Trinidad Villar-Linan
    • Journal Title

      Mathematica Slovaca

      Volume: 69 Issue: 5 Pages: 969-978

    • DOI

      10.1515/ms-2017-0281

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Extension to 3-colorable triangulations on surfaces2019

    • Author(s)
      A. Nakamoto, K. Noguchi and K. Ozeki
    • Journal Title

      SIAM Journal on Discrete Mathematics

      Volume: 33 Issue: 3 Pages: 1390-1414

    • DOI

      10.1137/17m1135505

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Book embedding of graphs on the projective plane2019

    • Author(s)
      K. Ozeki, A. Nakamoto and T. Nozawa
    • Journal Title

      SIAM Journal on Discrete Mathematics

      Volume: 33 Issue: 4 Pages: 1801-1836

    • DOI

      10.1137/16m1076174

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Spanning bipartite quadrangulations of even triangulations2018

    • Author(s)
      Nakamoto Atsuhiro、Noguchi Kenta、Ozeki Kenta
    • Journal Title

      Journal of Graph Theory

      Volume: 90 Issue: 3 Pages: 267-287

    • DOI

      10.1002/jgt.22400

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Graph coverings with topology and group theory2023

    • Author(s)
      Seiya Negami
    • Organizer
      YNU-PSU Joint Mathematical Seminar 2023
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Geometric quadrangulation of a polygon with spirality2023

    • Author(s)
      Atsuhiro Nakamoto
    • Organizer
      YNU-PSU Joint Mathematical Seminar 2023
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Kempe equivalence classes of 3-edge-colorings of cubic graphs2023

    • Author(s)
      Kenta Ozeki
    • Organizer
      YNU-PSU Joint Mathematical Seminar 2023
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 被覆グラフ上の標準正則被覆とその応用2022

    • Author(s)
      根上生也
    • Organizer
      2022年度応用数学合同研究集会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 射影空間の四角形分割の染色数2022

    • Author(s)
      中本敦浩、小関健太、八森正泰
    • Organizer
      2022年度応用数学合同研究集会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 平面被覆予想,新たなアプローチ②2022

    • Author(s)
      根上生也
    • Organizer
      第34回位相幾何学的グラフ理論研究集会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 東京オリンピックのエンブレムから射影空間の四角形分割の彩色へ2022

    • Author(s)
      中本敦浩
    • Organizer
      第34回位相幾何学的グラフ理論研究集会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 3-連結平面3-正則グラフのKempe 同値類の数2022

    • Author(s)
      小関健太
    • Organizer
      第34回位相幾何学的グラフ理論研究集会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Coloring quadrangulations on the projective space2022

    • Author(s)
      中本敦浩
    • Organizer
      離散数学とその応用研究集会2022
    • Related Report
      2021 Annual Research Report
  • [Presentation] Kempe equivalence of cubic plane graphs2022

    • Author(s)
      小関健太
    • Organizer
      離散数学とその応用研究集会2022
    • Related Report
      2021 Annual Research Report
  • [Presentation] Claw-free 3-正則グラフの 2-bisection とその単色辺の数について2021

    • Author(s)
      オム・スンジェ、小関健太
    • Organizer
      2021年度応用数学合同研究集会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 4-正則グラフの H-彩色2021

    • Author(s)
      Analen A. Malnegro、Gina A. Malacas、小関健太
    • Organizer
      2021年度応用数学合同研究集会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 平面被覆予想,新たなアプローチ2021

    • Author(s)
      根上生也
    • Organizer
      第33回位相幾何学的グラフ理論研究集会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 4-正則グラフのH-彩色2021

    • Author(s)
      小関健太
    • Organizer
      第33回位相幾何学的グラフ理論研究集会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Very topological, topological graph theory2021

    • Author(s)
      根上生也
    • Organizer
      離散数学とその応用研究集会2021
    • Related Report
      2021 Annual Research Report
  • [Presentation] 射影空間の四角形分割の彩色2021

    • Author(s)
      中本敦浩
    • Organizer
      離散数学とその応用研究集会2021
    • Related Report
      2021 Annual Research Report
  • [Presentation] 3-正則 2 部グラフにおける各閉路が長い 2-factor2021

    • Author(s)
      小関健太
    • Organizer
      離散数学とその応用研究集会2021
    • Related Report
      2021 Annual Research Report
  • [Presentation] 平面被覆予想,新たなアプローチ2021

    • Author(s)
      根上 生也
    • Organizer
      第33回位相幾何学的グラフ理論研究集会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 4-正則グラフのH-彩色2021

    • Author(s)
      小関 健太
    • Organizer
      第33回位相幾何学的グラフ理論研究集会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Very topological, topological graph theory2021

    • Author(s)
      根上 生也
    • Organizer
      離散数学とその応用研究集会2021
    • Related Report
      2020 Annual Research Report
  • [Presentation] 射影空間の四角形分割の彩色2021

    • Author(s)
      中本 敦浩
    • Organizer
      離散数学とその応用研究集会2021
    • Related Report
      2020 Annual Research Report
  • [Presentation] 3-正則 2 部グラフにおける各閉路が長い 2-factor2021

    • Author(s)
      小関 健太
    • Organizer
      離散数学とその応用研究集会2021
    • Related Report
      2020 Annual Research Report
  • [Presentation] Claw-free 3-正則グラフの2-bisectionとその単色辺の数について2021

    • Author(s)
      オム スンジェ,小関 健太
    • Organizer
      2021年度応用数学合同研究集会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 4-正則グラフの H-彩色2021

    • Author(s)
      Analen A. Malnegro,Gina A. Malacas,小関健太
    • Organizer
      2021年度応用数学合同研究集会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Beans function の不連続点について2020

    • Author(s)
      根上 生也
    • Organizer
      第32回位相幾何学的グラフ理論研究集会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 射影空間の四角形分割について2020

    • Author(s)
      中本 敦浩
    • Organizer
      第32回位相幾何学的グラフ理論研究集会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 3-正則 2部グラフにおける各閉路が長い2-factor2020

    • Author(s)
      小関 健太
    • Organizer
      第32回位相幾何学的グラフ理論研究集会
    • Related Report
      2020 Annual Research Report
  • [Presentation] K1,p-free グラフの独立頂点の次数和と最小葉数の関係2020

    • Author(s)
      小関 健太,木村 正博
    • Organizer
      2020年度応用数学合同研究集会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 4-正則グラフの4辺彩色性とeven 2-factor2020

    • Author(s)
      オム スンジェ,小関 健太
    • Organizer
      2020年度応用数学合同研究集会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Approach to huge graph analysis using graph coverings2020

    • Author(s)
      Seiya Negami
    • Organizer
      YNU-PSU Joint Mathematical Seminar 2020
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 多面体的フレームを持つ閉曲面上の三角形分割の弛緩度22019

    • Author(s)
      根上 生也
    • Organizer
      第31回 位相幾何学的グラフ理論研究集会
    • Related Report
      2019 Annual Research Report
  • [Presentation] グラフの出次数制約のある向き付け2019

    • Author(s)
      小関 健太
    • Organizer
      第31回 位相幾何学的グラフ理論研究集会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Approach to Big Data Analysis Using Topological Graph Theory2019

    • Author(s)
      Seiya Negami
    • Organizer
      The 4th International Conference on Operations Research 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Book] 曲面上のグラフ理論2021

    • Author(s)
      中本 敦浩、小関 健太
    • Total Pages
      216
    • Publisher
      サイエンス社
    • ISBN
      9784781915302
    • Related Report
      2021 Annual Research Report 2020 Annual Research Report
  • [Remarks] 位相幾何学的グラフ理論研究拠点

    • URL

      http://tgt.ynu.ac.jp/

    • Related Report
      2021 Annual Research Report 2020 Annual Research Report
  • [Remarks] 位相幾何学的グラフ理論研究拠点/横浜国立大学

    • URL

      http://tgt.ynu.ac.jp/

    • Related Report
      2019 Annual Research Report
  • [Funded Workshop] YNU-PSU Joint Mathematical Seminar 20232023

    • Related Report
      2021 Annual Research Report

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Published: 2019-04-18   Modified: 2024-01-30  

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