Development of algorithms for the server-assignment problem to maximize available capacity of networks

• Project/Area Number: 25330003
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Theory of informatics
• Research Institution: Tohoku University
• Principal Investigator: ITO TAKEHIRO 東北大学, 情報科学研究科, 准教授 (40431548)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000); Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2013: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
• Keywords: アルゴリズム / グラフ理論 / グラフ / 固定パラメータ容易性 / 近似困難性

Outline of Final Research Achievements

We modeled the following situation as a graph problem: In a network, we wish to find a way of data distributions from servers to all users to avoid any congestion of network links. We studied the complexity status of this problem from the viewpoint of graph structures, and clarified how the complexity status depends on the number of cycles or the number of servers in a graph. In many cases, this problem is computationally intractable, and hence we gave pseudo-polynomial-time algorithms based on a dynamic programming method and fixed-parameter algorithms.

Research Products

• [Int'l Joint Research] ウォータールー大学(カナダ)
• [Int'l Joint Research] マサチューセッツ工科大学/ブラウン大学(米国)
• [Int'l Joint Research] レイキャヴィーク大学(アイスランド)
• [Journal Article] A Polynomial-Time Approximation Scheme for the Geometric Unique Coverage Problem on Unit Squares (2016)
  • Author(s): Takehiro Ito, Shin-ichi Nakano, Yoshio Okamoto, Yota Otachi, Ryuhei Uehara, Takeaki Uno, Yushi Uno,
  • Journal Title: Computational Geometry: Theory and Applications Volume: 51 Pages: 25-39
  • DOI: 10.1016/j.comgeo.2015.10.004
  • NAID: 120005954496
  • Peer Reviewed
• [Journal Article] Reconfiguration of Vertex Covers in a Graph (2016)
  • Author(s): Takehiro Ito, Hiroyuki Nooka, Xiao Zhou
  • Journal Title: IEICE Transactions on Information and Systems Volume: E99.D Issue: 3 Pages: 598-606
  • DOI: 10.1587/transinf.2015FCP0010
  • NAID: 130005131815
  • ISSN: 0916-8532, 1745-1361
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] The Minimum Vulnerability Problem on Specific Graph Classes (2016)
  • Author(s): Yusuke Aoki, Bjarni V. Halldorsson, Magnus M. Halldorsson, Takehiro Ito, Christian Konrad, Xiao Zhou
  • Journal Title: Journal of Combinatorial Optimization Volume: 印刷中 Issue: 4 Pages: 1288-1304
  • DOI: 10.1007/s10878-015-9950-2
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Efficient Stabilization of Cooperative Matching Games (2016)
  • Author(s): Takehiro Ito, Naonori Kakimura, Naoyuki Kamiyama, Yusuke Kobayashi, Yoshio Okamoto
  • Journal Title: Proc. of AAMAS 2016 Volume: 印刷中
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Linear-Time Algorithm for Sliding Tokens on Trees (2015)
  • Author(s): Erik D Demaine, Martin L Demaine, Eli Fox-Epstein, Duc A Hoang, Takehiro Ito, Hirotaka Ono, Yota Otachi, Ryuhei Uehara, and Takeshi Yamada
  • Journal Title: Theoretical Computer Science Volume: 600 Pages: 132-142
  • DOI: 10.1016/j.tcs.2015.07.037
  • NAID: 120006355793
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] The Complexity of Dominating Set Reconfiguration (2015)
  • Author(s): Arash Haddadan, Takehiro Ito, Amer E. Mouawad, Naomi Nishimura, Hirotaka Ono, Akira Suzuki, Youcef Tebbal
  • Journal Title: Lecture Notes in Computer Science Volume: 9214 Pages: 398-409
  • DOI: 10.1007/978-3-319-21840-3_33
  • ISBN: 9783319218397, 9783319218403
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Competitive Diffusion on Weighted Graphs (2015)
  • Author(s): Takehiro Ito, Yota Otachi, Toshiki Saitoh, Hisayuki Satoh, Akira Suzuki, Kei Uchizawa, Ryuhei Uehara, Katsuhisa Yamanaka, Xiao Zhou
  • Journal Title: Proc. 14th International Symposium on Algorithms and Data Structures (WADS 2015), Lecture Notes in Computer Science Volume: 9214 Pages: 422-433
  • DOI: 10.1007/978-3-319-21840-3_35
  • NAID: 120005850317
  • ISBN: 9783319218397, 9783319218403
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Algorithms for the Independent Feedback Vertex Set Problem (2015)
  • Author(s): Yuma Tamura, Takehiro Ito, Xiao Zhou
  • Journal Title: IEICE Trans. on Fundamentals of Electronics, Communications and Computer Sciences Volume: 印刷中
  • NAID: 130005071827
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] The List Coloring Reconfiguration Problem for Bounded Pathwidth Graphs (2015)
  • Author(s): Tatsuhiko Hatanaka, Takehiro Ito, Xiao Zhou
  • Journal Title: IEICE Trans. on Fundamentals of Electronics, Communications and Computer Sciences Volume: 印刷中
  • NAID: 130005071828
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Swapping Labeled Tokens on Graphs (2015)
  • Author(s): Katsuhisa Yamanaka, Erik D. Demaine, Takehiro Ito, Jun Kawahara, Masashi Kiyomi, Yoshio Okamoto, Toshiki Saitoh, Akira Suzuki, Kei Uchizawa, Takeaki Uno
  • Journal Title: Theoretical Computer Science Volume: 印刷中 Pages: 81-94
  • DOI: 10.1016/j.tcs.2015.01.052
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Deterministic Algorithms for the Independent Feedback Vertex Set Problem (2015)
  • Author(s): Yuma Tamura, Takehiro Ito, Xiao Zhou
  • Journal Title: Lecture Notes in Computer Science Volume: 印刷中
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Reconfiguration of Vertex Covers in a Graph (2015)
  • Author(s): Takehiro Ito, Hiroyuki Nooka, Xiao Zhou
  • Journal Title: Lecture Notes in Computer Science Volume: 印刷中
  • NAID: 130005131815
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Reconfiguration of Cliques in a Graph (2015)
  • Author(s): Takehiro Ito, Hirotaka Ono, Yota Otachi
  • Journal Title: Lecture Notes in Computer Science Volume: 印刷中
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Experimental Evaluations of Dynamic Algorithm for Maintaining Shortest-Paths Trees on Real-World Networks (2015)
  • Author(s): Takashi Hasegawa, Takehiro Ito, Akira Suzuki, Xiao Zhou
  • Journal Title: Interdisciplinary Information Sciences Volume: 21 Issue: 1 Pages: 25-35
  • DOI: 10.4036/iis.2015.25
  • NAID: 110009890454
  • ISSN: 1340-9050, 1347-6157
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Complexity of Finding Maximum Regular Induced Subgraphs with Prescribed Degree (2014)
  • Author(s): Yuichi Asahiro, Hiroshi Eto, Takehiro Ito, Eiji Miyano
  • Journal Title: Theoretical Computer Science Volume: 550 Pages: 21-35
  • DOI: 10.1016/j.tcs.2014.07.008
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] A 4.31-Approximation for the Geometric Unique Coverage Problem on Unit Disks (2014)
  • Author(s): Takehiro Ito, Shin-ichi Nakano, Yoshio Okamoto, Yota Otachi, Ryuhei Uehara, Takeaki Uno, Yushi Uno
  • Journal Title: Theoretical Computer Science Volume: 544 Pages: 14-31
  • DOI: 10.1016/j.tcs.2014.04.014
  • NAID: 120005893622
  • Peer Reviewed
• [Journal Article] Reconfigure on list L(2, 1)-labelings in a graph (2014)
  • Author(s): Takehiro Ito, Kazuto Kawamura, Hitotaka Ono and Xiao Zhou
  • Journal Title: Theoretical Computer Science (TCS) Volume: 544 Pages: 84-97
  • DOI: 10.1016/j.tcs.2014.04.011
  • NAID: 110009670153
  • Peer Reviewed
• [Journal Article] The Minimum Vulnerability Problem on Graphs (2014)
  • Author(s): Yusuke Aoki, Bjarni V. Halldorsson, Magnus M. Halldorsson, Takehiro Ito, Christian Konrad, Xiao Zhou
  • Journal Title: Lecture Notes in Computer Science Volume: 8881 Pages: 299-313
  • DOI: 10.1007/978-3-319-12691-3_23
  • ISBN: 9783319126906, 9783319126913
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] The List Coloring Reconfiguration Problem for Bounded Pathwidth Graphs (2014)
  • Author(s): Tatsuhiko Hatanaka, Takehiro Ito, Xiao Zhou
  • Journal Title: Lecture Notes in Computer Science Volume: 8881 Pages: 314-328
  • DOI: 10.1007/978-3-319-12691-3_24
  • NAID: 130005071828
  • ISBN: 9783319126906, 9783319126913
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Minimum-Cost b-Edge Dominating Sets on Trees (2014)
  • Author(s): Takehiro Ito, Naonori Kakimura, Naoyuki Kamiyama, Yusuke Kobayashi, and Yoshio Okamoto
  • Journal Title: Lecture Notes in Computer Science Volume: 8889 Pages: 195-207
  • DOI: 10.1007/978-3-319-13075-0_16
  • ISBN: 9783319130743, 9783319130750
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Fixed-Parameter Tractability of Token Jumping on Planar Graphs (2014)
  • Author(s): Takehiro Ito, Marcin Kaminski, Hirotaka Ono
  • Journal Title: Lecture Notes in Computer Science Volume: 8889 Pages: 208-219
  • DOI: 10.1007/978-3-319-13075-0_17
  • ISBN: 9783319130743, 9783319130750
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Polynomial-Time Algorithm for Sliding Tokens on Trees (2014)
  • Author(s): Erik D. Demaine, Martin L. Demaine, Eli Fox-Epstein, Duc A. Hoang, Takehiro Ito, Hirotaka Ono, Yota Otachi, Ryuhei Uehara, Takeshi Yamada
  • Journal Title: Lecture Notes in Computer Science Volume: 8889 Pages: 389-400
  • DOI: 10.1007/978-3-319-13075-0_31
  • NAID: 120005850324
  • ISBN: 9783319130743, 9783319130750
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] On the Minimum Caterpillar Problem in Digraphs (2014)
  • Author(s): Taku Okada, Akira Suzuki, Takehiro Ito and Xiao Zhou
  • Journal Title: IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences Volume: E97.A Issue: 3 Pages: 848-857
  • DOI: 10.1587/transfun.E97.A.848
  • NAID: 130003394790
  • ISSN: 0916-8508, 1745-1337
  • Peer Reviewed
• [Journal Article] Generalized rainbow connectivity of graphs (2014)
  • Author(s): Kei Uchizawa, Takanori Aoki, Takehiro Ito and Xiao Zhou
  • Journal Title: Theoretical Computer Science (TCS) Volume: 555 Pages: 35-42
  • DOI: 10.1016/j.tcs.2014.01.007
  • Peer Reviewed
• [Journal Article] Swapping Labeled Tokens on Graphs (2014)
  • Author(s): Katsuhisa Yamanaka, Erik D. Demaine, Takehiro Ito, Jun Kawahara, Masashi Kiyomi, Yoshio Okamoto, Toshiki Saitoh, Akira Suzuki, Kei Uchizawa, Takeaki Uno
  • Journal Title: Lecture Notes in Computer Science Volume: 印刷中
  • Peer Reviewed
• [Journal Article] Complexity of Finding Maximum Regular Induced Subgraphs with Prescribed Degree (2013)
  • Author(s): Yuichi Asahiro, Hiroshi Eto, Takehiro Ito, Eiji Miyano
  • Journal Title: Proceedings of the 19th International Symposium on Fundamentals of Computation Theory (FCT2013) Volume: 8070 Pages: 28-39
  • DOI: 10.1007/978-3-642-40164-0_6
  • ISBN: 9783642401633, 9783642401640
  • Peer Reviewed
• [Presentation] Efficient Stabilization of Cooperative Matching Games (2016)
  • Author(s): Takehiro Ito, Naonori Kakimura, Naoyuki Kamiyama, Yusuke Kobayashi, Yoshio Okamoto
  • Organizer: 15th International Conference on Autonomous Agents and Multi-Agent Systems (AAMAS 2016)
  • Place of Presentation: シンガポール （シンガポール共和国）
  • Year and Date: 2016-05-11
  • Int'l Joint Research
• [Presentation] Competitive Diffusion on Weighted Graphs (2015)
  • Author(s): Takehiro Ito, Yota Otachi, Toshiki Saitoh, Hisayuki Satoh, Akira Suzuki, Kei Uchizawa, Ryuhei Uehara, Katsuhisa Yamanaka, Xiao Zhou
  • Organizer: 14th Algorithms and Data Structures Symposium (WADS 2015)
  • Place of Presentation: ビクトリア （カナダ）
  • Year and Date: 2015-08-06
  • Int'l Joint Research
• [Presentation] The Complexity of Dominating Set Reconfiguration (2015)
  • Author(s): Arash Haddadan, Takehiro Ito, Amer E. Mouawad, Naomi Nishimura, Hirotaka Ono, Akira Suzuki, Youcef Tebbal
  • Organizer: 14th Algorithms and Data Structures Symposium (WADS 2015)
  • Place of Presentation: ビクトリア （カナダ）
  • Year and Date: 2015-08-05
  • Int'l Joint Research
• [Presentation] Reconfiguration of Cliques in a Graph (2015)
  • Author(s): Takehiro Ito, Hirotaka Ono, Yota Otachi
  • Organizer: 12th Annual Conference on Theory and Applications of Models of Computation
  • Place of Presentation: シンガポール
  • Year and Date: 2015-05-19
• [Presentation] The Minimum Vulnerability Problem on Graphs (2014)
  • Author(s): Yusuke Aoki, Bjarni V. Halldorsson, Magnus M. Halldorsson, Takehiro Ito, Christian Konrad, Xiao Zhou
  • Organizer: 8th Annual International Conference on Combinatorial Optimization and Applications
  • Place of Presentation: ハワイ（アメリカ）
  • Year and Date: 2014-12-20
• [Presentation] The List Coloring Reconfiguration Problem for Bounded Pathwidth Graphs (2014)
  • Author(s): Tatsuhiko Hatanaka, Takehiro Ito, Xiao Zhou
  • Organizer: 8th Annual International Conference on Combinatorial Optimization and Applications
  • Place of Presentation: ハワイ（アメリカ）
  • Year and Date: 2014-12-20
• [Presentation] Polynomial-Time Algorithm for Sliding Tokens on Trees (2014)
  • Author(s): Erik D. Demaine, Martin L. Demaine, Eli Fox-Epstein, Duc A. Hoang, Takehiro Ito, Hirotaka Ono, Yota Otachi, Ryuhei Uehara, Takeshi Yamada
  • Organizer: 25th Annual International Symposium on Algorithms and Computation
  • Place of Presentation: 全州（韓国）
  • Year and Date: 2014-12-16
• [Presentation] Minimum-Cost b-Edge Dominating Sets on Trees (2014)
  • Author(s): Takehiro Ito, Naonori Kakimura, Naoyuki Kamiyama, Yusuke Kobayashi, Yoshio Okamoto
  • Organizer: 25th Annual International Symposium on Algorithms and Computation
  • Place of Presentation: 全州（韓国）
  • Year and Date: 2014-12-15
• [Presentation] Fixed-Parameter Tractability of Token Jumping on Planar Graphs (2014)
  • Author(s): Takehiro Ito, Marcin Kaminski, Hirotaka Ono
  • Organizer: 25th Annual International Symposium on Algorithms and Computation
  • Place of Presentation: 全州（韓国）
  • Year and Date: 2014-12-15
• [Presentation] Deterministic Algorithms for the Independent Feedback Vertex Set Problem (2014)
  • Author(s): Yuma Tamura, Takehiro Ito, Xiao Zhou
  • Organizer: 25th International Workshop on Combinatorial Algorithms
  • Place of Presentation: ダルース（アメリカ）
  • Year and Date: 2014-10-17
• [Presentation] Reconfiguration of Vertex Covers in a Graph (2014)
  • Author(s): Takehiro Ito, Hiroyuki Nooka, Xiao Zhou
  • Organizer: 25th International Workshop on Combinatorial Algorithms
  • Place of Presentation: ダルース（アメリカ）
  • Year and Date: 2014-10-15
• [Presentation] Complexity of Finding Maximum Regular Induced Subgraphs with Prescribed Degree
  • Author(s): Yuichi Asahiro, Hiroshi Eto, Takehiro Ito, Eiji Miyano
  • Organizer: 19th International Symposium on Fundamentals of Computation Theory
  • Place of Presentation: イギリス，リバプール
• [Presentation] Swapping Labeled Tokens on Graphs
  • Author(s): Katsuhisa Yamanaka, Erik D. Demaine, Takehiro Ito, Jun Kawahara, Masashi Kiyomi, Yoshio Okamoto, Toshiki Saitoh, Akira Suzuki, Kei Uchizawa, Takeaki Uno
  • Organizer: 7th International Conference on FUN with Algorithms
  • Place of Presentation: イタリア，シチリア島