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関数のグラフ表現性に関する研究

Research Project

Project/Area Number 16J04545
Research Category

Grant-in-Aid for JSPS Fellows

Allocation TypeSingle-year Grants
Section国内
Research Field Mathematical informatics
Research InstitutionThe University of Tokyo

Principal Investigator

岩政 勇仁  東京大学, 情報理工学系研究科, 特別研究員(DC1)

Project Period (FY) 2016-04-22 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 2018: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 2017: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 2016: ¥700,000 (Direct Cost: ¥700,000)
Keywords組合せ最適化 / 離散凸解析 / 値付き制約充足問題 / グラフ表現性 / 系統樹復元
Outline of Annual Research Achievements

系統樹構築問題とは,与えられた四点木(=葉の数が4の系統樹)の集合に対して,その全てに整合する系統樹を構築する問題である.これは,計算生物学の分野だけでなく,理論計算機科学の分野でも盛んに研究されている問題である.系統樹構築問題は一般的にはNP困難であり,高速なヒューリスティクスアルゴリズム,近似アルゴリズム,FPTアルゴリズムの研究が数多く存在する.一方,「どの四点木システム(=四点木の集合)に対しては系統樹構築問題が多項式時間で解けるか」という自然な疑問に対しては,ほとんど研究がなされていなかった.
本研究の成果として,実社会で現れうる四点木システムを二つ(complete multipartite quartet system, full multipartite quartet system)導入し,それらに対して系統樹構築問題が多項式時間で解けることを示した.これは,新しい多項式時間可解なクラスを明らかにした重要な研究であると言える.この結果は,12月に行われた査読付き国際会議 International Symposium on Algorithms and Computation (ISAAC'18)に採択され,発表を行った.
本研究で提案したアルゴリズムは,前年度の成果である「2次M2凸表現可能性判定問題」に対する多項式時間アルゴリズムの亜種であるとみなせる.つまりこれは,関数のグラフ表現性に関する今までの研究を,計算生物学に応用して得られた成果である.

Research Progress Status

平成30年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

平成30年度が最終年度であるため、記入しない。

Report

(3 results)
  • 2018 Annual Research Report
  • 2017 Annual Research Report
  • 2016 Annual Research Report
  • Research Products

    (25 results)

All 2018 2017 2016 Other

All Int'l Joint Research (2 results) Journal Article (6 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 6 results,  Acknowledgement Compliant: 1 results) Presentation (14 results) (of which Int'l Joint Research: 6 results,  Invited: 2 results) Remarks (3 results)

  • [Int'l Joint Research] オックスフォード大学(英国)

    • Related Report
      2017 Annual Research Report
  • [Int'l Joint Research] オックスフォード大学(英国)

    • Related Report
      2016 Annual Research Report
  • [Journal Article] Reconstructing Phylogenetic Tree From Multipartite Quartet System2018

    • Author(s)
      Hiroshi Hirai and Yuni Iwamasa
    • Journal Title

      29th International Symposium on Algorithms and Computation (ISAAC 2018)

      Volume: 123

    • DOI

      10.4230/LIPICS.ISAAC.2018.57

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] On a general framework for network representability in discrete optimization2018

    • Author(s)
      Yuni Iwamasa
    • Journal Title

      Journal of Combinatorial Optimization

      Volume: 印刷中 Issue: 3 Pages: 678-708

    • DOI

      10.1007/s10878-017-0136-y

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The quadratic M-convexity testing problem2018

    • Author(s)
      Yuni Iwamasa
    • Journal Title

      Discrete Applied Mathematics

      Volume: 238 Pages: 106-114

    • DOI

      10.1016/j.dam.2017.12.004

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Discrete convexity in joint winner property2018

    • Author(s)
      Yuni Iwamasa, Kazuo Murota, Stanislav Zivny
    • Journal Title

      Discrete Optimization

      Volume: 印刷中 Pages: 78-88

    • DOI

      10.1016/j.disopt.2018.01.001

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Beyond JWP: A tractable class of binary VCSPs via M-convex intersection2018

    • Author(s)
      Hirai Hiroshi、Iwamasa Yuni、Murota Kazuo、Zivny Stanislav
    • Journal Title

      Proceedings of the 35th International Symposium on Theoretical Aspects of Computer Science (STACS'18), LIPIcs

      Volume: 96

    • DOI

      10.4230/LIPIcs.STACS.2018.39

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] On a general framework for network representability in discrete optimization [Extended Abstract]2016

    • Author(s)
      Yuni Iwamasa
    • Journal Title

      Proceedings of the 4th International Symposium on Combinatorial Optimization

      Volume: LNCS 9849 Pages: 369-380

    • DOI

      10.1007/978-3-319-45587-7_32

    • ISBN
      9783319455860, 9783319455877
    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] 完全多部四点木システムからの系統樹復元2018

    • Author(s)
      平井 広志,岩政 勇仁
    • Organizer
      日本オペレーションズ・リサーチ学会 研究部会「最適化とその応用-未来を担う若手研究者の集い2018-」
    • Related Report
      2018 Annual Research Report
  • [Presentation] Discrete convexity in binary VCSPs2018

    • Author(s)
      Hiroshi Hirai, Yuni Iwamasa, Kazuo Murota, Stanislav Zivny
    • Organizer
      The 23rd International Symposium on Mathematical Programming
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 完全多部四点木システムからの系統樹構築2018

    • Author(s)
      平井 広志,岩政 勇仁
    • Organizer
      日本応用数理学会 2018年度年会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Reconstructing phylogenetic tree from multipartite quartet system2018

    • Author(s)
      Hiroshi Hirai, Yuni Iwamasa
    • Organizer
      The 29th International Symposium on Algorithms and Computation
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 値付き制約充足問題と離散凸性:2次値付き制約充足問題のM凸交叉による多項式時間可解なクラス2018

    • Author(s)
      平井 広志,岩政 勇仁,室田 一雄,Stanislav Zivny
    • Organizer
      日本オペレーションズ・リサーチ学会 研究部会「離散アルゴリズムの応用と理論」
    • Related Report
      2017 Annual Research Report
    • Invited
  • [Presentation] Beyond JWP: A tractable class of binary VCSPs via M-convex intersection2018

    • Author(s)
      Hiroshi Hirai, Yuni Iwamasa, Kazuo Murota, Stanislav Zivny
    • Organizer
      The 35th International Symposium on Theoretical Aspects of Computer Science (STACS'18)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A tractable class of binary VCSPs via M-convex intersection2018

    • Author(s)
      Hiroshi Hirai, Yuni Iwamasa, Kazuo Murota, Stanislav Zivny
    • Organizer
      電子情報通信学会2018年(平成30年)総合大会 COMP-ELC学生シンポジウム
    • Related Report
      2017 Annual Research Report
  • [Presentation] 2次関数のM凸性判定問題2017

    • Author(s)
      岩政 勇仁
    • Organizer
      日本オペレーションズ・リサーチ学会 2017年春季研究発表会(創立60周年記念大会)
    • Place of Presentation
      沖縄県市町村自治会館(沖縄県那覇市)
    • Year and Date
      2017-03-15
    • Related Report
      2016 Annual Research Report
  • [Presentation] The quadratic M-convexity testing problem2017

    • Author(s)
      Yuni Iwamasa
    • Organizer
      The 10th Japanese-Hungarian Symposium on Discrete Mathematics and Its Applications (JH'17)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Discrete convexity in joint winner property2017

    • Author(s)
      Yuni Iwamasa, Kazuo Murota, Stanislav Zivny
    • Organizer
      The 19th Conference on Integer Programming and Combinatorial Optimization (IPCO'17)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Discrete convexity in valued constraint satisfaction problems: M-convexity and joint winner property2017

    • Author(s)
      岩政 勇仁,室田 一雄,Stanislav Zivny
    • Organizer
      Japanese Conference on Combinatorics and its Applications (JCCA 2017)・離散数学とその応用研究集会2017
    • Related Report
      2017 Annual Research Report
    • Invited
  • [Presentation] Discrete convexity in joint winner property2017

    • Author(s)
      Yuni Iwamasa, Kazuo Murota, Stanislav Zivny
    • Organizer
      日本応用数理学会 2017年度年会
    • Related Report
      2017 Annual Research Report
  • [Presentation] M${}^\natural$-convex completion problem2016

    • Author(s)
      岩政 勇仁,室田 一雄
    • Organizer
      日本オペレーションズ・リサーチ学会 研究部会「最適化の基盤とフロンティア--未来を担う若手研究者の集い2016--」
    • Place of Presentation
      筑波大学(茨城県つくば市)
    • Year and Date
      2016-05-28
    • Related Report
      2016 Annual Research Report
  • [Presentation] On a general framework for network representability in discrete optimization2016

    • Author(s)
      Yuni Iwamasa
    • Organizer
      The 4th International Symposium on Combinatorial Optimization (ISCO'16)
    • Place of Presentation
      Salerno, Italy
    • Year and Date
      2016-05-16
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Remarks] 備考

    • URL

      http://www.misojiro.t.u-tokyo.ac.jp/~iwamasa/

    • Related Report
      2018 Annual Research Report
  • [Remarks] 研究成果

    • URL

      http://www.misojiro.t.u-tokyo.ac.jp/~iwamasa/ja/publications.html

    • Related Report
      2017 Annual Research Report 2016 Annual Research Report
  • [Remarks] 発表

    • URL

      http://www.misojiro.t.u-tokyo.ac.jp/~iwamasa/ja/talks.html

    • Related Report
      2016 Annual Research Report

URL: 

Published: 2016-05-17   Modified: 2024-03-26  

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