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Establishing Circuit Complexity Theory of Nondeterministic Circuits

Research Project

Project/Area Number 15K11986
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Theory of informatics
Research InstitutionShimane University

Principal Investigator

Morizumi Hiroki  島根大学, 学術研究院理工学系, 助教 (50463782)

Project Period (FY) 2015-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Keywords計算量理論 / 回路計算量 / 非決定性回路
Outline of Final Research Achievements

We studied nondeterministic circuits to explore the circuit complexity. In this study, Boolean circuits are considered as a mathematical model of computation, and studied from the viewpoint of computational complexity theory, on the background that there are many open problems of computational complexity such as the P vs. NP problem. As the conclusion, we obtained several results for nondeterministic circuits and related problems.

Academic Significance and Societal Importance of the Research Achievements

計算機の進歩とともに計算機を活用して問題を解くことが広く行われるようになり多くのアルゴリズムが開発されているが,その一方,問題の本質的な難しさについては,P対NP問題をはじめとして解明されていない事が多く残されている.回路計算量は問題の本質的な難しさを証明するのに有力と考えられている手法の一つであり,30年以上に渡り広く研究が行われている.本研究は,非決定性回路に着目し,その研究を確立することで,難問とされている問題の難しさに関する未解決問題の解決へとつなげることを目的として実施した.

Report

(5 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • 2015 Research-status Report
  • Research Products

    (5 results)

All 2019 2018 2015

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Acknowledgement Compliant: 1 results) Presentation (3 results)

  • [Journal Article] Zero-Suppression and Computation Models2018

    • Author(s)
      Hiroki Morizumi
    • Journal Title

      Lecture Notes in Computer Science

      Volume: 10979 Pages: 263-272

    • DOI

      10.1007/978-3-319-94667-2_22

    • ISBN
      9783319946665, 9783319946672
    • Related Report
      2018 Annual Research Report 2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Lower Bounds for the Size of Nondeterministic Circuits2015

    • Author(s)
      Hiroki Morizumi
    • Journal Title

      Lecture Notes in Computer Science

      Volume: 9198 Pages: 289-296

    • DOI

      10.1007/978-3-319-21398-9_23

    • ISBN
      9783319213972, 9783319213989
    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] Some Results on the Power of Nondeterministic Computation2019

    • Author(s)
      Hiroki Morizumi
    • Organizer
      2018年度冬のLAシンポジウム
    • Related Report
      2018 Annual Research Report
  • [Presentation] Lower Bounds and Satisfiability Algorithms for Bounded Width Circuits2019

    • Author(s)
      Hiroki Morizumi
    • Organizer
      電子情報通信学会コンピュテーション研究会(2019年3月)
    • Related Report
      2018 Annual Research Report
  • [Presentation] ZDDと論理式に関する一考察2018

    • Author(s)
      森住 大樹
    • Organizer
      情報処理学会 第167回アルゴリズム研究会
    • Related Report
      2017 Research-status Report

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Published: 2015-04-16   Modified: 2020-03-30  

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