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2021 Fiscal Year Annual Research Report

Development of Combinatorial Reconfiguration by Mathematics Approach: From Examples to New Methods

Planned Research

Project AreaFusion of Computer Science, Engineering and Mathematics Approaches for Expanding Combinatorial Reconfiguration
Project/Area Number 20H05795
Research InstitutionThe University of Electro-Communications

Principal Investigator

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

Co-Investigator(Kenkyū-buntansha) 神山 直之  九州大学, マス・フォア・インダストリ研究所, 教授 (10548134)
小関 健太  横浜国立大学, 大学院環境情報研究院, 准教授 (10649122)
垣村 尚徳  慶應義塾大学, 理工学部(矢上), 准教授 (30508180)
小林 佑輔  京都大学, 数理解析研究所, 准教授 (40581591)
野崎 雄太  広島大学, 先進理工系科学研究科(理), 助教 (40822648)
岩政 勇仁  京都大学, 情報学研究科, 助教 (70854602)
Project Period (FY) 2020-10-02 – 2023-03-31
Keywords組合せ遷移 / 数学 / 離散数学 / アルゴリズム / 計算複雑性
Outline of Annual Research Achievements

「組合せ遷移に対する数学理論」の構築を大目標として,主に次の研究を行った.
(1) 部分テーマ「組合せ遷移における数学活用事例の体系的収集」において,アルゴリズムゲーム理論における組合せ遷移問題に対して数学活用を行い,その結果を体系的に収集した.特に,無羨望割当に関わる組合せ遷移問題に対して,計算複雑性の解析,多項式時間アルゴリズムの設計,近似不可能性・固定パラメータ困難性の解析を行った.この成果を人工知能分野のトップ会議であるAAAI 2022で発表した.
(2) 部分テーマ「組合せ遷移に資する数理手法の開発」において,グラフ理論に関わる問題を組合せ遷移の視点から調査し,離散構造,特に劣モジュラ性を利用した方法論を開発した.それによって,グラフ理論において古くから知られているNash-Williamsの定理を組合せ遷移の手法によって証明する新しい手法を与えた.この成果を離散アルゴリズム分野のトップ会議であるSODA 2022で発表した.
(3) 部分テーマ「組合せ遷移に資する数理手法の開発」において,グラフ理論に関わる問題を組合せ遷移の視点から調査し,トポロジー,特に曲線の理論を利用した方法論を開発した.それによって,トポロジー的な障害とグラフ理論的な障害を分離することが可能になり,平面グラフに対する多項式時間アルゴリズムを設計することに成功した.この成果をarXivにおいてプレプリントとして発表した.
また,組合せ遷移に関する国際ワークショップ「Combinatorial Reconfiguration in Discrete and Computational Geometry」「Graph Theory for Combinatorial Reconfiguration」「Polytope Diameter and Related Topics」「Combinatorial Reconfiguration and Fixed-Parameter Tractability」を主催し,組合せ遷移研究の国際展開と普及に努めた.

Current Status of Research Progress
Current Status of Research Progress

1: Research has progressed more than it was originally planned.

Reason

研究計画書に記載した2つの研究テーマに関して,研究成果が上がり,研究発表も行うことができた.なお,繰越の関係上,本報告では,2021年度から2022年度に関わる研究成果を記載している.

Strategy for Future Research Activity

残りの研究期間で,2つの研究テーマに関して研究を推進するのみならず,他計画研究との協同,国際共同研究の展開も行っていく予定である.

  • Research Products

    (94 results)

All 2023 2022 2021 Other

All Int'l Joint Research (6 results) Journal Article (53 results) (of which Int'l Joint Research: 16 results,  Peer Reviewed: 45 results,  Open Access: 21 results) Presentation (29 results) (of which Int'l Joint Research: 12 results,  Invited: 4 results) Book (1 results) Remarks (1 results) Funded Workshop (4 results)

  • [Int'l Joint Research] ドルトムント工科大学/ヴュルツブルク大学/ボン大学(ドイツ)

    • Country Name
      GERMANY
    • Counterpart Institution
      ドルトムント工科大学/ヴュルツブルク大学/ボン大学
    • # of Other Institutions
      7
  • [Int'l Joint Research] リヨン大学/ボルドー大学/パリ=サクレー大学(フランス)

    • Country Name
      FRANCE
    • Counterpart Institution
      リヨン大学/ボルドー大学/パリ=サクレー大学
    • # of Other Institutions
      2
  • [Int'l Joint Research] カリフォルニア大学サンタバーバラ/グーグル研究所/シーメンス(米国)

    • Country Name
      U.S.A.
    • Counterpart Institution
      カリフォルニア大学サンタバーバラ/グーグル研究所/シーメンス
    • # of Other Institutions
      1
  • [Int'l Joint Research] フルミネンセ連邦大学/カンピーナス大学(ブラジル)

    • Country Name
      BRAZIL
    • Counterpart Institution
      フルミネンセ連邦大学/カンピーナス大学
  • [Int'l Joint Research] ウィーン工科大学/グラーツ工科大学(オーストリア)

    • Country Name
      AUSTRIA
    • Counterpart Institution
      ウィーン工科大学/グラーツ工科大学
  • [Int'l Joint Research]

    • # of Other Countries
      15
  • [Journal Article] Pareto efficient matchings with pairwise preferences2023

    • Author(s)
      Naoyuki Kamiyama
    • Journal Title

      Theoretical Computer Science

      Volume: 948 Pages: 113707

    • DOI

      10.1016/j.tcs.2023.113707

    • Peer Reviewed
  • [Journal Article] Reconfiguring (non-spanning) arborescences2023

    • Author(s)
      Takehiro Ito, Yuni Iwamasa, Yasuaki Kobayashi, Yu Nakahata, Yota Otachi, Kunihiro Wasa
    • Journal Title

      Theoretical Computer Science

      Volume: 943 Pages: 131-141

    • DOI

      10.1016/j.tcs.2022.12.007

    • Peer Reviewed
  • [Journal Article] Monotone edge flips to an orientation of maximum edge-connectivity a la Nash-Williams2023

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

      ACM Transactions on Algorithms

      Volume: 19 Pages: 6

    • DOI

      10.1145/3561302

    • Peer Reviewed
  • [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

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Independent set reconfiguration on directed graphs2022

    • Author(s)
      Takehiro Ito, Yuni Iwamasa, Yasuaki Kobayashi, Yu Nakahata, Yota Otachi, Masahiro Takahashi, Kunihiro Wasa
    • Journal Title

      Proc. of 47th International Symposium on Mathematical Foundations of Computer Science (MFCS 2022), Leibniz International Proceedings in Informatics

      Volume: 241 Pages: 58:1-58:15

    • DOI

      10.4230/LIPIcs.MFCS.2022.58

    • Peer Reviewed / Open Access
  • [Journal Article] An improved deterministic parameterized algorithm for cactus vertex deletion2022

    • Author(s)
      Yuuki Aoike, Tatsuya Gima, Tesshu Hanaka, Masashi Kiyomi, Yasuaki Kobayashi, Yusuke Kobayashi, Kazuhiro Kurita, Yota Otachi
    • Journal Title

      Theory of Computing Systems

      Volume: 66 Pages: 502-515

    • DOI

      10.1007/s00224-022-10076-x

    • 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 Pages: 370-375

    • DOI

      10.1016/j.orl.2022.05.001

    • Peer Reviewed / Open Access
  • [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

    • DOI

      10.20382/jocg.v13i1a1

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [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

      arXiv

      Volume: -- Pages: 2207.02641

    • DOI

      10.48550/arXiv.2207.02641

    • Open Access
  • [Journal Article] Algorithms for coloring reconfiguration under recolorability digraphs2022

    • Author(s)
      Soichiro Fujii, Yuni Iwamasa, Kei Kimura, Akira Suzuki
    • Journal Title

      Proc. of 33rd International Symposium on Algorithms and Computation (ISAAC 2022), Leibniz International Proceedings in Informatics

      Volume: 248 Pages: 4:1-4:19

    • DOI

      10.4230/LIPIcs.ISAAC.2022.4

    • Peer Reviewed / Open Access
  • [Journal Article] Rerouting planar curves and disjoint paths2022

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

      arXiv

      Volume: -- Pages: 2210.11778

    • DOI

      10.48550/arXiv.2210.11778

    • Open Access
  • [Journal Article] Reconfiguration of colorings in triangulations of the sphere2022

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

      arXiv

      Volume: -- Pages: 2210.17105

    • DOI

      10.48550/arXiv.2210.17105

    • Open Access
  • [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

    • Peer Reviewed
  • [Journal Article] Optimal matroid bases with intersection constraints: Valuated matroids, M-convex functions, and their applications2022

    • Author(s)
      Yuni Iwamasa, Kenjiro Takazawa
    • Journal Title

      Mathematical Programming, Series A

      Volume: 194 Pages: 229-256

    • DOI

      10.1007/s10107-021-01625-2

    • Peer Reviewed
  • [Journal Article] A combinatorial algorithm for computing the rank of a generic partitioned matrix with 2x2 submatrices2022

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

      Mathematical Programming, Series A

      Volume: 195 Pages: 1-37

    • DOI

      10.1007/s10107-021-01676-5

    • Peer Reviewed
  • [Journal Article] Kempe equivalence classes of cubic graphs embedded on the projective plane2022

    • Author(s)
      Kenta Ozeki
    • Journal Title

      Combinatorica

      Volume: 42 Pages: 1451-1480

    • DOI

      10.1007/s00493-021-4330-2

    • Peer Reviewed
  • [Journal Article] Maximum properly colored trees in edge-colored graphs2022

    • Author(s)
      Jie Hu, Hao Li, Shun-ichi Maezawa
    • Journal Title

      Journal of Combinatorial Optimization

      Volume: 44 Pages: 154-171

    • DOI

      10.1007/s10878-021-00824-z

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Reconfiguration of spanning trees with degree constraint or diameter constraint2022

    • Author(s)
      Nicolas Bousquet, Takehiro Ito, Yusuke Kobayashi, Haruka Mizuta, Paul Ouvrard, Akira Suzuki, Kunihiro Wasa
    • Journal Title

      arXiv

      Volume: -- Pages: 2201.04354

    • DOI

      10.48550/arXiv.2201.04354

    • Open Access / Int'l Joint Research
  • [Journal Article] A framework to design approximation algorithms for finding diverse solutions in combinatorial problems2022

    • Author(s)
      Tesshu Hanaka, Masashi Kiyomi, Yasuaki Kobayashi, Yusuke Kobayashi, Kazuhiro Kurita, Yota Otachi
    • Journal Title

      arXiv

      Volume: -- Pages: 2201.08940

    • DOI

      10.48550/arXiv.2201.08940

    • Open Access
  • [Journal Article] Linear-time recognition of double-threshold graphs2022

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

      Algorithmica

      Volume: 84 Pages: 1163-1181

    • DOI

      10.1007/s00453-021-00921-9

    • Peer Reviewed / Open Access
  • [Journal Article] 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
    • Journal Title

      Proc. of Annual ACM-SIAM Symposium on Discrete Algorithms (SODA 2022)

      Volume: -- Pages: 1342-1355

    • DOI

      10.1137/1.9781611977073.56

    • Peer Reviewed
  • [Journal Article] On the kernel of the surgery map restricted to the 1-loop part2022

    • Author(s)
      Yuta Nozaki, Masatoshi Sato, Masaaki Suzuki
    • Journal Title

      Journal of Topology

      Volume: 15 Pages: 587-619

    • DOI

      10.1112/topo.12233

    • Peer Reviewed
  • [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 Pages: 12:1-12:16

    • DOI

      10.4230/LIPIcs.SoCG.2022.12

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Multi-pass streaming algorithms for monotone submodular function maximization2022

    • Author(s)
      Chien-Chung Huang, Naonori Kakimura
    • Journal Title

      Theory of Computing Systems

      Volume: 66 Pages: 354-394

    • DOI

      10.1007/s00224-021-10065-6

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Reconfiguration of spanning trees with degree constraint or diameter constraint2022

    • Author(s)
      Nicolas Bousquet, Takehiro Ito, Yusuke Kobayashi, Haruka Mizuta, Paul Ouvrard, Akira Suzuki, Kunihiro Wasa
    • Journal Title

      Proc. of 39th International Symposium on Theoretical Aspects of Computer Science (STACS 2022), Leibniz International Proceedings in Informatics

      Volume: 219 Pages: 15:1-15:21

    • DOI

      10.4230/LIPIcs.STACS.2022.15

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Independent set reconfiguration on directed graphs2022

    • Author(s)
      Takehiro Ito, Yuni Iwamasa, Yasuaki Kobayashi, Yu Nakahata, Yota Otachi, Masahiro Takahashi, Kunihiro Wasa
    • Journal Title

      arXiv

      Volume: -- Pages: 2203.13435

    • DOI

      10.48550/arXiv.2203.13435

    • Open Access
  • [Journal Article] A forbidden pair for connected graphs to have spanning k-trees2022

    • Author(s)
      Shun-ichi Maezawa, Kenta Ozeki
    • Journal Title

      Journal of Graph Theory

      Volume: 99 Pages: 509-519

    • DOI

      10.1002/jgt.22752

    • Peer Reviewed
  • [Journal Article] Approximability of monotone submodular function maximization under cardinality and matroid constraints in the streaming model2022

    • Author(s)
      Chien-Chung Huang, Naonori Kakimura, Simon Mauras, Yuichi Yoshida
    • Journal Title

      SIAM Journal on Discrete Mathematics

      Volume: 36 Pages: 355-382

    • DOI

      10.1137/20M1357317

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Parameterized complexity of (A, l)-path packing2022

    • Author(s)
      Remy Belmonte, Tesshu Hanaka, Masaaki Kanzaki, Masashi Kiyomi, Yasuaki Kobayashi, Yusuke Kobayashi, Michael Lampis, Hirotaka Ono, Yota Otachi
    • Journal Title

      Algorithmica

      Volume: 84 Pages: 871-895

    • DOI

      10.1007/s00453-021-00875-y

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Covering projective planar graphs with three forests2022

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

      Discrete Mathematics

      Volume: 345 Pages: 112748

    • DOI

      10.1016/j.disc.2021.112748

    • Peer Reviewed
  • [Journal Article] The Alon-Tarsi number of K5-minor-free graphs2022

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

      Discrete Mathematics

      Volume: 345 Pages: 112764

    • DOI

      10.1016/j.disc.2021.112764

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Submodular reassignment problem for reallocating agents to tasks with synergy effects2022

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

      Discrete Optimization

      Volume: 44 Pages: 100631

    • DOI

      10.1016/j.disopt.2021.100631

    • Peer Reviewed
  • [Journal Article] Quantaloidal approach to constraint satisfaction2022

    • Author(s)
      Soichiro Fujii, Yuni Iwamasa, Kei Kimura
    • Journal Title

      Proc. of 4th International Conference on Applied Category Theory (ACT 2021), Electronic Proceedings in Theoretical Computer Science

      Volume: 372 Pages: 289-305

    • DOI

      10.4204/EPTCS.372.21

    • Peer Reviewed / Open Access
  • [Journal Article] Reconstructing phylogenetic trees from multipartite quartet systems2022

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

      Algorithmica

      Volume: 84 Pages: 1875-1896

    • DOI

      10.1007/s00453-022-00945-9

    • Peer Reviewed
  • [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 Pages: 1102-1123

    • DOI

      10.1137/20M1364370

    • Peer Reviewed
  • [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 Pages: 7

    • DOI

      10.20429/tag.2022.090107

    • Peer Reviewed
  • [Journal Article] A framework to design approximation algorithms for finding diverse solutions in combinatorial problems2022

    • Author(s)
      Tesshu Hanaka, Masashi Kiyomi, Yasuaki Kobayashi, Yusuke Kobayashi, Kazuhiro Kurita, Yota Otachi
    • Journal Title

      Proc. of 37th AAAI Conference on Artificial Intelligence (AAAI 2023)

      Volume: -- Pages: 掲載予定

    • Peer Reviewed
  • [Journal Article] Finding a maximum minimal separator: graph classes and fixed-parameter tractability2021

    • Author(s)
      Tesshu Hanaka, Yasuaki Kobayashi, Yusuke Kobayashi, Tsuyoshi Yagita
    • Journal Title

      Theoretical Computer Science

      Volume: 865 Pages: 131-140

    • DOI

      10.1016/j.tcs.2021.03.006

    • Peer Reviewed
  • [Journal Article] A combinatorial algorithm for computing the entire sequence of the maximum degree of minors of a generic partitioned polynomial matrix with 2x2 submatrices2021

    • Author(s)
      Yuni Iwamasa
    • Journal Title

      arXiv

      Volume: -- Pages: 2104.14841

    • DOI

      10.48550/arXiv.2104.14841

    • Open Access
  • [Journal Article] A combinatorial algorithm for computing the degree of the determinant of a generic partitioned polynomial matrix with 2x2 submatrices2021

    • Author(s)
      Yuni Iwamasa
    • Journal Title

      Proc. of 22nd Conference on Integer Programming and Combinatorial Optimization (IPCO 2021), Lecture Notes in Computer Science

      Volume: 12707 Pages: 119-133

    • DOI

      10.1007/978-3-030-73879-2_9

    • Peer Reviewed
  • [Journal Article] Algorithms for gerrymandering over graphs2021

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

      Theoretical Computer Science

      Volume: 868 Pages: 30-45

    • DOI

      10.1016/j.tcs.2021.03.037

    • Peer Reviewed
  • [Journal Article] ClusterSets: optimizing planar clusters in categorical point data2021

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

      Computer Graphics Forum

      Volume: 40 Pages: 471-481

    • DOI

      10.1111/cgf.14322

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

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

      Discrete Mathematics

      Volume: 344 Pages: 112357

    • DOI

      10.1016/j.disc.2021.112357

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Color number of cubic graphs having spanning tree with bounded number of leaves2021

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

      Theory and Applications of Graphs

      Volume: 8 Pages: Article 1

    • DOI

      10.20429/tag.2021.080201

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] On 3-polytopes with non-Hamiltonian prisms2021

    • Author(s)
      Daiki Ikegami, Shun-ichi Maezawa, Carol T. Zamfirescu
    • Journal Title

      Journal of Graph Theory

      Volume: 97 Pages: 569-577

    • DOI

      10.1002/jgt.22672

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] On the complexity of fair house allocation2021

    • Author(s)
      Naoyuki Kamiyama, Pasin Manurangsi, Warut Suksompong
    • Journal Title

      Operations Research Letters

      Volume: 49 Pages: 572-577

    • DOI

      10.1016/j.orl.2021.06.006

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Dynamic bipartite matching market with arrivals and departures2021

    • Author(s)
      Naonori Kakimura, Donghao Zhu
    • Journal Title

      Proc. of 17th Conference on Web and Internet Economics (WINE 2021), Lecture Notes in Computer Science

      Volume: 13112 Pages: 544

    • DOI

      10.1007/978-3-030-94676-0

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Proper colorings of plane quadrangulations without rainbow faces2021

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

      Graphs and Combinatorics

      Volume: 37 Pages: 1873-1890

    • DOI

      10.1007/s00373-021-02350-5

    • Peer Reviewed
  • [Journal Article] Reconfiguring directed trees in a digraph2021

    • Author(s)
      Takehiro Ito, Yuni Iwamasa, Yasuaki Kobayashi, Yu Nakahata, Yota Otachi, Kunihiro Wasa
    • Journal Title

      Proc. of 27th International Computing and Combinatorics Conference (COCOON 2021), Lecture Notes in Computer Science

      Volume: 13025 Pages: 343-354

    • DOI

      10.1007/978-3-030-89543-3_29

    • Peer Reviewed
  • [Journal Article] Monotone edge flips to an orientation of maximum edge-connectivity a la Nash-Williams2021

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

      arXiv

      Volume: -- Pages: 2110.11585

    • DOI

      10.48550/arXiv.2110.11585

    • Open Access
  • [Journal Article] Distributed reconfiguration of spanning trees2021

    • Author(s)
      Yukiko Yamauchi, Naoyuki Kamiyama, Yota Otachi
    • Journal Title

      Proc. of 23rd International Symposium on Stabilization, Safety, and Security of Distributed Systems (SSS 2021), Lecture Notes in Computer Science

      Volume: 13046 Pages: 516-520

    • DOI

      10.1007/978-3-030-91081-5_40

    • Peer Reviewed
  • [Journal Article] Online task assignment problems with reusable resources2021

    • Author(s)
      Hanna Sumita, Shinji Ito, Kei Takemura, Daisuke Hatano, Takuro Fukunaga, Naonori Kakimura, Ken-ichi Kawarabayashi
    • Journal Title

      Proc. of 36th AAAI Conference on Artificial Intelligence (AAAI 2022)

      Volume: 36 Pages: 5199-5207

    • DOI

      10.1609/aaai.v36i5.20455

    • Peer Reviewed
  • [Journal Article] Reforming an envy-free matching2021

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

      Proc. of 36th AAAI Conference on Artificial Intelligence (AAAI 2022)

      Volume: 36 Pages: 5084-5091

    • DOI

      10.1609/aaai.v36i5.20441

    • Peer Reviewed
  • [Presentation] Kempe equivalence classes on 3-edge-colorings in cubic graphs2023

    • Author(s)
      Kenta Ozeki
    • Organizer
      Joint Mathematics Meetings
    • Int'l Joint Research
  • [Presentation] 組合せ遷移におけるトポロジーの視点2023

    • Author(s)
      野崎雄太
    • Organizer
      電子情報通信学会コンピュテーション研究会
    • Invited
  • [Presentation] Kempe equivalence of cubic plane graphs2022

    • Author(s)
      小関 健太
    • Organizer
      Japanese Conference on Combinatorics and its Applications 2022 離散数学とその応用研究集会2022
  • [Presentation] Angular Resolution in Graph Drawing2022

    • Author(s)
      Yoshio Okamoto
    • Organizer
      GD 2022 PhD School
    • Int'l Joint Research / Invited
  • [Presentation] 球面の三角形分割の彩色遷移2022

    • Author(s)
      伊藤 健洋,岩政 勇仁,小林 佑輔,前澤 俊一,野崎 雄太,岡本 吉央,小関 健太
    • Organizer
      日本オペレーションズ・リサーチ学会 2022年秋季研究発表会
  • [Presentation] ストリーミングデータにおけるアイテム頻出数を求める省領域乱択アルゴリズム2022

    • Author(s)
      垣村尚徳,新田陸
    • Organizer
      電子情報通信学会コンピュテーション研究会
  • [Presentation] ILS における解グラフの連結性に関する研究2022

    • Author(s)
      重信 賢直, 神山 直之
    • Organizer
      日本オペレーションズ・リサーチ学会九州支部 九州地区におけるOR若手研究交流会
  • [Presentation] Reconfiguration and Enumeration of Optimal Cyclic Ladder Lotteries2022

    • Author(s)
      Yuta Nozaki, Kunihiro Wasa, Katsuhisa Yamanaka
    • Organizer
      電子情報通信学会コンピュテーション研究会
  • [Presentation] 球面の三角形分割の彩色遷移2022

    • Author(s)
      伊藤 健洋,岩政 勇仁,小林 佑輔,前澤 俊一,野崎 雄太,岡本 吉央,小関 健太
    • Organizer
      2022年度応用数学合同研究集会
  • [Presentation] Algorithms for coloring reconfiguration under recolorability digraphs2022

    • Author(s)
      Soichiro Fujii, Yuni Iwamasa, Kei Kimura, and Akira Suzuki
    • Organizer
      The 33rd International Symposium on Algorithms and Computation (ISAAC 2022)
    • 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
      2022 ACM-SIAM Symposium on Discrete Algorithms (SODA 2022)
    • Int'l Joint Research
  • [Presentation] On finding Nash equilibria of discrete preference games and network coordination games2022

    • Author(s)
      石塚 天, 神山 直之
    • Organizer
      2021年度冬のLAシンポジウム, 京都大学数理解析研究所RIMS共同研究(公開型), 情報社会を支える計算機科学の基礎理論
  • [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
    • 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
  • [Presentation] Reconfiguration of spanning trees with degree constraint or diameter constraint2022

    • Author(s)
      Nicolas Bousquet, Takehiro Ito, Yusuke Kobayashi, Haruka Mizuta, Paul Ouvrard, Akira Suzuki, Kunihiro Wasa
    • Organizer
      39th International Symposium on Theoretical Aspects of Computer Science (STACS 2022)
    • Int'l Joint Research
  • [Presentation] On reachable assignments under dichotomous preferences2022

    • Author(s)
      Takehiro Ito, Naonori Kakimura, Naoyuki Kamiyama, Yusuke Kobayashi, Yuta Nozaki, Yoshio Okamoto, and Kenta Ozeki
    • Organizer
      24th International Conference on Principles and Practice of Multi-Agent Systems (PRIMA)
    • 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
  • [Presentation] A combinatorial algorithm for computing the degree of the determinant of a generic partitioned polynomial matrix with 2x2 submatrices2021

    • Author(s)
      Yuni Iwamasa
    • Organizer
      22nd Conference on Integer Programming and Combinatorial Optimization (IPCO 2021)
    • Int'l Joint Research
  • [Presentation] ClusterSets: optimizing planar clusters in categorical point data2021

    • Author(s)
      Jakob Geiger, Sabine Cornelsen, Jan-Henrik Haunert, Philipp Kindermann, Tamara Mchedlidze, Martin Nollenburg, Yoshio Okamoto, Alexander Wolff
    • Organizer
      23rd EG Conference on Visualization (EuroVis 2021)
    • 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
    • Int'l Joint Research
  • [Presentation] Quantaloidal approach to constraint satisfaction2021

    • Author(s)
      Soichiro Fujii, Yuni Iwamasa, Kei Kimura
    • Organizer
      4th International Conference on Applied Category Theory (ACT 2021)
    • Int'l Joint Research
  • [Presentation] Reconfiguring directed trees in a digraph2021

    • Author(s)
      Takehiro Ito, Yuni Iwamasa, Yasuaki Kobayashi, Yu Nakahata, Yota Otachi, Kunihiro Wasa
    • Organizer
      Workshop on Combinatorial Reconfiguration, affiliated with ICALP 2021
    • 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
  • [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
  • [Presentation] 辺着色グラフの虹色全域木への辺分割とRota のbasis 予想2021

    • Author(s)
      前澤 俊一
    • Organizer
      離散数学とその応用研究集会2021
  • [Presentation] 2x2型分割多項式行列の行列式次数を求める組合せ的多項式時間アルゴリズム2021

    • Author(s)
      岩政 勇仁
    • Organizer
      日本応用数理学会 2021年度年会
  • [Presentation] Reconfiguring directed trees in a digraph2021

    • Author(s)
      Takehiro Ito, Yuni Iwamasa, Yasuaki Kobayashi, Yu Nakahata, Yota Otachi, Kunihiro Wasa
    • Organizer
      27th International Computing and Combinatorics Conference (COCOON 2021)
    • Int'l Joint Research
  • [Presentation] 2部マッチング問題の代数的拡張2021

    • Author(s)
      岩政 勇仁
    • Organizer
      日本オペレーションズ・リサーチ学会「最適化手法とアルゴリズム」研究部会 第3回 研究会
    • Invited
  • [Presentation] Token sliding on directed graphs2021

    • Author(s)
      Takehiro Ito, Yuni Iwamasa, Yasuaki Kobayashi, Yu Nakahata, Masahiro Takahashi, Yota Otachi, Kunihiro Wasa
    • Organizer
      電子情報通信学会コンピュテーション研究会
  • [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
      978-4-7819-1530-2
  • [Remarks] 組合せ遷移@学術変革領域研究(B) HOME

    • URL

      https://core.dais.is.tohoku.ac.jp/

  • [Funded Workshop] Workshop "Polytope Diameter and Related Topics"2022

  • [Funded Workshop] Workshop "Combinatorial Reconfiguration and Fixed-Parameter Tractability"2022

  • [Funded Workshop] Workshop "Combinatorial Reconfiguration in Discrete and Computational Geometry"2021

  • [Funded Workshop] Workshop "Graph Theory for Combinatorial Reconfiguration"2021

URL: 

Published: 2023-12-25  

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