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Optimization theory over large configuration spaces from the viewpoint of discrete structures

Research Project

Project/Area Number 20K11670
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 60010:Theory of informatics-related
Research InstitutionThe University of Electro-Communications

Principal Investigator

OKAMOTO Yoshio  電気通信大学, 大学院情報理工学研究科, 教授 (00402660)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywordsアルゴリズム / 計算理論 / グラフ理論 / 離散幾何学 / 量子プログラミング / アルゴリズム理論 / 最適化理論 / 離散数学 / 組合せ遷移 / 凸多面体 / 計算幾何
Outline of Research at the Start

本研究課題は,考慮すべき配位が大規模となる離散システムを対象として,その配位空間上の最適化問題を効率的に解くための計算理論的な方法論を探究する.応用領域として,オペレーションズ・リサーチと理論物理学を想定している.本研究課題の方法論は,それらの応用領域においてヒューリスティックな手法で個別にしか解けなかった問題に対して,数理科学・計算理論に根差した頑健で一般的な問題解決法を提供する.

Outline of Final Research Achievements

Over the four-year research period, including the extension period, 24 academic papers and 12 presentations were produced. Below are samples of the notable achievements. (1) It was demonstrated that the shortest path problem in the configuration space of graph associahedra is computationally hard. This research was accepted at ICALP, a refereed international conference on theoretical computer science with a long tradition. (2) The challenge of efficiently mapping quantum algorithms to quantum computers was shown to be computationally hard, even in highly restricted architectures. This finding was accepted at WADS, a respected refereed international conference on algorithms and data structures.

Academic Significance and Societal Importance of the Research Achievements

大規模配位空間に対して,既存研究では連結性といった位相的性質に関する研究が主に行われていたが,本研究によって,最短路やクラスタリングといった距離的性質に関する研究の成果が多く得られた.これによって,オペレーションズ・リサーチや理論物理学といった領域に大規模配位空間における最適化の数理が理論的に応用可能であることが判明した.将来的には,理論だけではなく,実用に進展することが期待される.

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (50 results)

All 2024 2023 2022 2021 2020 Other

All Int'l Joint Research (11 results) Journal Article (24 results) (of which Int'l Joint Research: 9 results,  Peer Reviewed: 23 results,  Open Access: 18 results) Presentation (15 results) (of which Int'l Joint Research: 8 results,  Invited: 3 results)

  • [Int'l Joint Research] バージニア・コモンウェルス大学(米国)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] ミナス・ジェライス連邦大学(ブラジル)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] ベイルート・アメリカン大学(レバノン)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] ドルトムント工科大学/ザールラント大学/ツーゼ研究所ベルリン(ドイツ)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] アイントホーフェン工科大学/アディエン(オランダ)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] グラーツ工科大学(オーストリア)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] テルアビブ大学(イスラエル)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] デンマーク工科大学(デンマーク)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] ボン大学/ヴュルツブルク大学/コンスタンツ大学(ドイツ)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] ユトレヒト大学(オランダ)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] ウィーン工科大学(オーストリア)

    • Related Report
      2021 Research-status Report
  • [Journal Article] CoRe Challenge 2022/2023: Empirical evaluations for independent set reconfiguration problems (Extended Abstract)2024

    • Author(s)
      Takehide Soh, Tomoya Tanjo, Yoshio Okamoto, Takehiro Ito
    • Journal Title

      Proc. of 17th International Symposium on Combinatorial Search (SoCS 2024)

      Volume: --

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Rerouting planar curves and disjoint paths2023

    • Author(s)
      Takehiro Ito, Yuni Iwamasa, Naonori Kakimura, Yusuke Kobayashi, Shun-ichi Maezawa, Yuta Nozaki, Yoshio Okamoto, Kenta Ozeki
    • Journal Title

      Proc. of 50th EATCS International Colloquium on Automata, Languages and Programming (ICALP 2023), Leibniz International Proceedings in Informatics

      Volume: 261

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] On reachable assignments under dichotomous preferences2023

    • Author(s)
      Ito Takehiro、Kakimura Naonori、Kamiyama Naoyuki、Kobayashi Yusuke、Nozaki Yuta、Okamoto Yoshio、Ozeki Kenta
    • Journal Title

      Theoretical Computer Science

      Volume: 979 Pages: 114196-114196

    • DOI

      10.1016/j.tcs.2023.114196

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Algorithmic theory of qubit routing2023

    • Author(s)
      Takehiro Ito, Naonori Kakimura, Naoyuki Kamiyama, Yusuke Kobayashi, Yoshio Okamoto
    • Journal Title

      Proc. of 18th Algorithms and Data Structures Symposium (WADS 2023), Lecture Notes in Computer Science

      Volume: 14079 Pages: 533-546

    • DOI

      10.1007/978-3-031-38906-1_35

    • ISBN
      9783031389054, 9783031389061
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Reconfiguration of colorings in triangulations of the sphere2023

    • Author(s)
      Takehiro Ito, Yuni Iwamasa, Yusuke Kobayashi, Shun-ichi Maezawa, Yuta Nozaki, Yoshio Okamoto, Kenta Ozeki
    • Journal Title

      Proc. of 39th International Symposium on Computational Geometry (SoCG 2023), Leibniz International Proceedings in Informatics

      Volume: 258

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Minimum separator reconfiguration2023

    • Author(s)
      Guilherme C. M. Gomes, Clement Legrand-Duchesne, Reem Mahmoud, Amer E. Mouawad, Yoshio Okamoto, Vinicius F. dos Santos, Tom C. van der Zanden
    • Journal Title

      arXiv

      Volume: --

    • Related Report
      2023 Annual Research Report
    • Open Access / Int'l Joint Research
  • [Journal Article] Hardness of finding combinatorial shortest paths on graph associahedra2023

    • Author(s)
      Takehiro Ito, Naonori Kakimura, Naoyuki Kamiyama, Yusuke Kobayashi, Shun-ichi Maezawa, Yuta Nozaki, Yoshio Okamoto
    • Journal Title

      Proc. of 50th EATCS International Colloquium on Automata, Languages and Programming (ICALP 2023), Leibniz International Proceedings in Informatics

      Volume: 261

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Minimum separator reconfiguration2023

    • Author(s)
      Guilherme C. M. Gomes, Clement Legrand-Duchesne, Reem Mahmoud, Amer E. Mouawad, Yoshio Okamoto, Vinicius F. dos Santos, Tom C. van der Zanden
    • Journal Title

      Proc. of 18th International Symposium on Parameterized and Exact Computation (IPEC 2023), Leibniz International Proceedings in Informatics

      Volume: 285

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Graphs with large total angular resolution2023

    • Author(s)
      Oswin Aichholzer, Matias Korman, Yoshio Okamoto, Irene Parada, Daniel Perz, Andre van Renssen, Birgit Vogtenhuber
    • Journal Title

      Theoretical Computer Science

      Volume: 943 Pages: 73-88

    • DOI

      10.1016/j.tcs.2022.12.010

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Weight balancing on boundaries2022

    • Author(s)
      Luis Barba, Otfried Cheong, Michael Gene Dobbins, Rudolf Fleischer, Akitoshi Kawamura, Matias Korman, Yoshio Okamoto, Janos Pach, Yuan Tang, Takeshi Tokuyama, Sander Verdonschot
    • Journal Title

      Journal of Computational Geometry

      Volume: 13 Pages: 1-12

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Shortest reconfiguration of perfect matchings via alternating cycles2022

    • Author(s)
      Takehiro Ito, Naonori Kakimura, Naoyuki Kamiyama, Yusuke Kobayashi, Yoshio Okamoto
    • Journal Title

      SIAM Journal on Discrete Mathematics

      Volume: 36 Issue: 2 Pages: 1102-1123

    • DOI

      10.1137/20m1364370

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] A parameterized view to the robust recoverable base problem of matroids under structural uncertainty2022

    • Author(s)
      Takehiro Ito, Naonori Kakimura, Naoyuki Kamiyama, Yusuke Kobayashi, Yoshio Okamoto
    • Journal Title

      Operations Research Letters

      Volume: 50 Issue: 3 Pages: 370-375

    • DOI

      10.1016/j.orl.2022.05.001

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Unlabeled multi-robot motion planning with tighter separation bounds2022

    • Author(s)
      Bahareh Banyassady, Mark de Berg, Karl Bringmann, Kevin Buchin, Henning Fernau, Dan Halperin, Irina Kostitsyna, Yoshio Okamoto, Stijn Slot
    • Journal Title

      Proc. of 38th International Symposium on Computational Geometry (SoCG 2022), Leibniz International Proceedings in Informatics

      Volume: 224

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] On reachable assignments under dichotomous preferences2022

    • Author(s)
      Takehiro Ito, Naonori Kakimura, Naoyuki Kamiyama, Yusuke Kobayashi, Yuta Nozaki, Yoshio Okamoto, Kenta Ozeki
    • Journal Title

      Proc. of 24th International Conference on Principles and Practice of Multi-Agent Systems (PRIMA 2022), Lecture Notes in Computer Science

      Volume: 13753 Pages: 650-658

    • DOI

      10.1007/978-3-031-21203-1_43

    • ISBN
      9783031212024, 9783031212031
    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Linear-Time Recognition of Double-Threshold Graphs2022

    • Author(s)
      Yusuke Kobayashi, Yoshio Okamoto, Yota Otachi, Yushi Uno
    • Journal Title

      Algorithmica 84(4): 1163-1181 (2022)

      Volume: 84 Issue: 4 Pages: 1163-1181

    • DOI

      10.1007/s00453-021-00921-9

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Monotone edge flips to an orientation of maximum edge-connectivity ? la Nash-Williams2022

    • Author(s)
      Ito Takehiro、Iwamasa Yuni、Kakimura Naonori、Kamiyama Naoyuki、Kobayashi Yusuke、Maezawa Shun-ichi、Nozaki Yuta、Okamoto Yoshio、Ozeki Kenta
    • Journal Title

      Proceedings of the 2022 Annual ACM-SIAM Symposium on Discrete Algorithms (SODA)

      Volume: なし Pages: 1342-1355

    • DOI

      10.1137/1.9781611977073.56

    • ISBN
      9781611977073
    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Reforming an envy-free matching2022

    • Author(s)
      Takehiro Ito, Yuni Iwamasa, Naonori Kakimura, Naoyuki Kamiyama, Yusuke Kobayashi, Yuta Nozaki, Yoshio Okamoto, Kenta Ozeki
    • Journal Title

      Proceedings of the 36th AAAI Conference on Artificial Intelligence (AAAI 2022)

      Volume: 掲載予定

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Submodular Reassignment Problem for Reallocating Agents to Tasks with Synergy Effects2021

    • Author(s)
      Naonori Kakimura, Naoyuki Kamiyama, Yusuke Kobayashi, and Yoshio Okamoto
    • Journal Title

      Discrete Optimization

      Volume: to appear Pages: 100631-100631

    • DOI

      10.1016/j.disopt.2021.100631

    • Related Report
      2022 Research-status Report 2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] ClusterSets: Optimizing Planar Clusters in Categorical Point Data2021

    • Author(s)
      Jakob Geiger, Sabine Cornelsen, Jan-Henrik Haunert, Philipp Kindermann, Tamara Mchedlidze, Martin Noellenburg, Yoshio Okamoto, Alexander Wolff
    • Journal Title

      Computer Graphics Forum

      Volume: 40 Issue: 3 Pages: 471-481

    • DOI

      10.1111/cgf.14322

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Rectilinear link diameter and radius in a rectilinear polygonal domain2021

    • Author(s)
      Arseneva Elena、Chiu Man-Kwun、Korman Matias、Markovic Aleksandar、Okamoto Yoshio、Ooms Aur?lien、van Renssen Andr?、Roeloffzen Marcel
    • Journal Title

      Computational Geometry

      Volume: 92 Pages: 101685-101685

    • DOI

      10.1016/j.comgeo.2020.101685

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Algorithms for gerrymandering over graphs2021

    • Author(s)
      Ito Takehiro、Kamiyama Naoyuki、Kobayashi Yusuke、Okamoto Yoshio
    • Journal Title

      Theoretical Computer Science

      Volume: 868 Pages: 30-45

    • DOI

      10.1016/j.tcs.2021.03.037

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Algorithmic Enumeration of Surrounding Polygons2020

    • Author(s)
      K. Yamanaka, D. Avis, T. Horiyama, Yoshio Okamoto, R. Uehara and T. Yamauchi
    • Journal Title

      Discrete Applied Mathematics

      Volume: online Pages: 1-19

    • DOI

      10.1016/j.dam.2020.03.034

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Subgraph Isomorphism on Graph Classes that Exclude a Substructure2020

    • Author(s)
      Bodlaender Hans L.、Hanaka Tesshu、Kobayashi Yasuaki、Kobayashi Yusuke、Okamoto Yoshio、Otachi Yota、van der Zanden Tom C.
    • Journal Title

      Algorithmica

      Volume: 82 Issue: 12 Pages: 3566-3587

    • DOI

      10.1007/s00453-020-00737-z

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Linear-Time Recognition of Double-Threshold Graphs2020

    • Author(s)
      Yusuke Kobayashi, Yoshio Okamoto, Yota Otachi, Yushi Uno
    • Journal Title

      Lecture Notes in Computer Science

      Volume: 12301 Pages: 286-297

    • DOI

      10.1007/978-3-030-60440-0_23

    • ISBN
      9783030604394, 9783030604400
    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] アルゴリズム的問題発見とアルゴリズム的問題解決2024

    • Author(s)
      岡本 吉央
    • Organizer
      第196回アルゴリズム研究発表会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Three open problems on combinatorial reconfiguration2023

    • Author(s)
      Takehiro Ito, Yuni Iwamasa, Naonori Kakimura, Naoyuki Kamiyama, Yusuke Kobayashi, Shun-ichi Maezawa, Yuta Nozaki, Yoshio Okamoto, Kenta Ozeki
    • Organizer
      3rd Workshop on Combinatorial Reconfiguration, affiliated with ICALP 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Algorithmic theory of qubit routing2023

    • Author(s)
      Takehiro Ito, Naonori Kakimura, Naoyuki Kamiyama, Yusuke Kobayashi, Yoshio Okamoto
    • Organizer
      3rd Workshop on Combinatorial Reconfiguration, affiliated with ICALP 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Angular Resolution in Graph Drawing2022

    • Author(s)
      Yoshio Okamoto
    • Organizer
      Graph Drawing 2022 PhD School
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Monotone edge flips to an orientation of maximum edge-connectivity a la Nash-Williams2022

    • Author(s)
      Takehiro Ito, Yuni Iwamasa, Naonori Kakimura, Naoyuki Kamiyama, Yusuke Kobayashi, Shun-ichi Maezawa, Yuta Nozaki, Yoshio Okamoto, Kenta Ozeki
    • Organizer
      ICALP affiliated workshop "Combinatorial Reconfiguration"
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Monotone edge flips to an orientation of maximum edge-connectivity a la Nash-Williams2022

    • Author(s)
      Takehiro Ito, Yuni Iwamasa, Naonori Kakimura, Naoyuki Kamiyama, Yusuke Kobayashi, Shun-ichi Maezawa, Yuta Nozaki, Yoshio Okamoto, Kenta Ozeki
    • Organizer
      電子情報通信学会コンピュテーション研究会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] 「52人でババ抜きしてみた」の一般化と特殊化2022

    • Author(s)
      岡本 吉央
    • Organizer
      第16回組合せゲーム・パズル研究集会
    • Related Report
      2021 Research-status Report
  • [Presentation] Monotone edge flips to an orientation of maximum edge-connectivity a la Nash-Williams2022

    • Author(s)
      Takehiro Ito, Yuni Iwamasa, Naonori Kakimura, Naoyuki Kamiyama, Yusuke Kobayashi, Shun-ichi Maezawa, Yuta Nozaki, Yoshio Okamoto, Kenta Ozeki
    • Organizer
      2022 ACM-SIAM Symposium on Discrete Algorithms (SODA 2022)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Reforming an envy-free matching2022

    • Author(s)
      Takehiro Ito, Yuni Iwamasa, Naonori Kakimura, Naoyuki Kamiyama, Yusuke Kobayashi, Yuta Nozaki, Yoshio Okamoto, Kenta Ozeki
    • Organizer
      36th AAAI Conference on Artificial Intelligence (AAAI 2022)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Reformist envy-free item allocations: Algorithms and complexity2021

    • Author(s)
      Takehiro Ito, Yuni Iwamasa, Naonori Kakimura, Naoyuki Kamiyama, Yusuke Kobayashi, Yuta Nozaki, Yoshio Okamoto, Kenta Ozeki
    • Organizer
      第183回情報処理学会アルゴリズム研究会
    • Related Report
      2021 Research-status Report
  • [Presentation] ClusterSets: Optimizing planar clusters in categorical point data2021

    • Author(s)
      Jakob Geiger, Sabine Cornelsen, Jan-Henrik Haunert, Philipp Kindermann, Tamara Mchedlidze, Martin Noellenburg, Yoshio Okamoto, Alexander Wolff
    • Organizer
      23rd EG Conference on Visualization (EuroVis 2021)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Reconfiguration of envy-free item allocations2021

    • Author(s)
      Takehiro Ito, Yuni Iwamasa, Naonori Kakimura, Naoyuki Kamiyama, Yusuke Kobayashi, Yuta Nozaki, Yoshio Okamoto, Kenta Ozeki
    • Organizer
      Workshop on Combinatorial Reconfiguration, affiliated with ICALP 2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] 単位円配置の遷移 --- 連続的な組合せ遷移2021

    • Author(s)
      岡本 吉央
    • Organizer
      離散数学とその応用研究集会2021
    • Related Report
      2021 Research-status Report
  • [Presentation] 構造変化に応じるロバスト修復可能マトロイド基問題に対する固定パラメータアルゴリズム2020

    • Author(s)
      伊藤健洋、垣村尚徳、神山直之、小林佑輔、岡本吉央
    • Organizer
      FIT 2020
    • Related Report
      2020 Research-status Report
  • [Presentation] Sorting by Five Prefix Reversals2020

    • Author(s)
      Tetsuya Araki, Takashi Horiyama, Shin-ichi Nakano, Yoshio Okamoto, Yota Otachi, Ryuhei Uehara, Takeaki Uno, Katsuhisa Yamanaka
    • Organizer
      第179回情報処理学会アルゴリズム研究会
    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2025-01-30  

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