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グラフとその上のランダムウォークの研究

Research Project

Project/Area Number 16J04213
Research Category

Grant-in-Aid for JSPS Fellows

Allocation TypeSingle-year Grants
Section国内
Research Field Basic analysis
Research InstitutionShinshu University (2017)
Kyoto University (2016)

Principal Investigator

岡村 和樹  信州大学, 全学教育機構, 助教 (20758784)

Project Period (FY) 2016-04-22 – 2019-03-31
Project Status Completed (Fiscal Year 2017)
Budget Amount *help
¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywordsランダムウォーク / パーコレーション / ウィナーソーセージ / 大偏差原理 / ランダムウォークレンジ / ディリクレ形式
Outline of Annual Research Achievements

1. Noam Berger(ヘブライ大学), Chiranjib Mukherjee(ミュンスター大学)両氏との共同研究によって得られた、ある種の長距離相間をもちうるパーコレーション上のランダムウォークのプロセスレベルの大偏差原理の論文があるが、その大幅な書き直しに時間を費やした。このことは査読者からの報告書に応えるために必要であった。この論文はCommunication in Mathematical Physics誌に掲載が決まった。なお、Tuan Anh Nguyen氏(ベルリン工科大学)との議論により、グラフ距離に関する仮定をDeuchel-Nguyen-Slowik (2018) によるクラスターの正則性条件に置き換えることで、我々の証明の一部分においてより簡単な別解が得られることがわかった。しかし彼らの議論はランダムクラスターモデルには適用できないという問題点があり今後の課題である。
2. スペクトル次元がちょうど2のグラフ上のランダムウォークの訪問点の個数の増大度について、almost surelyでの挙動について考察した。Kim-Kumagai-Wang (2017) の結果から、(劣)Gauss型の熱核評価が成立するグラフでは、適切にスケールされた訪問点の個数の上極限と下極限が(出発点に依らない)定数に概収束することが従うが、今の所は上極限の定数の上下評価にとどまり、最重要な下極限の定数の下からの評価は結局わからなかった。その他にも、分散の良い評価が得られていないこと、また、2次元の整数格子上のBernoulli型パーコレーションの無限クラスター上でも未知であるという課題もある。
3. Dirichlet空間上のWienerソーセージの体積のalmost surelyでの長時間挙動について考察した。前年度に得た結果と合わせて年度末に学術雑誌に投稿した。

Research Progress Status

翌年度、交付申請を辞退するため、記入しない。

Strategy for Future Research Activity

翌年度、交付申請を辞退するため、記入しない。

Report

(2 results)
  • 2017 Annual Research Report
  • 2016 Annual Research Report
  • Research Products

    (25 results)

All 2018 2017 2016 Other

All Int'l Joint Research (3 results) Journal Article (5 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 5 results,  Open Access: 1 results) Presentation (15 results) (of which Int'l Joint Research: 6 results,  Invited: 3 results) Remarks (2 results)

  • [Int'l Joint Research] ヘブライ大学イェルサレム校(イスラエル)

    • Related Report
      2017 Annual Research Report
  • [Int'l Joint Research] ミュンスター大学/ミュンヘン工科大学(ドイツ)

    • Related Report
      2017 Annual Research Report
  • [Int'l Joint Research] クーラント数理科学研究所(米国)

    • Related Report
      2017 Annual Research Report
  • [Journal Article] Quenched Large Deviations for Simple Random Walks on Percolation Clusters Including Long-Range Correlations2018

    • Author(s)
      Noam Berger, Chiranjib Mukherjee, Kazuki Okamura
    • Journal Title

      Communications in Mathematical Physics

      Volume: 358 Issue: 2 Pages: 633-673

    • DOI

      10.1007/s00220-017-3054-z

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Self-similar measures for iterated function systems driven by weak contractions2018

    • Author(s)
      Kazuki Okamura
    • Journal Title

      Proceedings of the Japan Academy, Series A, Mathematical Sciences

      Volume: 94 Issue: 4 Pages: 31-35

    • DOI

      10.3792/pjaa.94.31

    • NAID

      40021543237

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Enlargement of subgraphs of infinite graphs by Bernoulli percolation2017

    • Author(s)
      Kazuki Okamura
    • Journal Title

      Indagationes Mathematicae

      Volume: 28 Issue: 4 Pages: 832-853

    • DOI

      10.1016/j.indag.2017.06.005

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Enlargement of subgraphs of infinite graphs by Bernoulli percolation : A summary2016

    • Author(s)
      Kazuki Okamura
    • Journal Title

      RIMS Kokyuroku Bessatsu

      Volume: B59 Pages: 227-236

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed
  • [Journal Article] On regularity for de Rham's functional equations2016

    • Author(s)
      Kazuki Okamura
    • Journal Title

      Aequationes mathematicae

      Volume: 90 Issue: 6 Pages: 1071-1085

    • DOI

      10.1007/s00010-016-0439-6

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed
  • [Presentation] Some results for range of random walk on graph with spectral dimension two2018

    • Author(s)
      Kazuki Okamura
    • Organizer
      Spin Systems: Discrete and Continuous
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Quenched large deviations for simple random walks on percolation models including long-range correlations2017

    • Author(s)
      岡村和樹 (joint work with Noam Berger and Chiranjib Mukherjee)
    • Organizer
      Kick off Meeting for Stochastic Analysis on Infinite Particle Systems I, Young Session
    • Place of Presentation
      九州大学、福岡県福岡市
    • Year and Date
      2017-01-24
    • Related Report
      2016 Annual Research Report
  • [Presentation] Long time behavior of the volume of the Wiener sausage on Dirichlet spaces2017

    • Author(s)
      岡村和樹
    • Organizer
      マルコフ過程とその周辺
    • Place of Presentation
      とくぎんトモニプラザ、徳島県徳島市
    • Year and Date
      2017-01-08
    • Related Report
      2016 Annual Research Report
  • [Presentation] 複雑なグラフの上のランダムウォークの諸性質について2017

    • Author(s)
      岡村和樹
    • Organizer
      日本数学会秋季総合分科会統計数学分科会特別講演
    • Related Report
      2017 Annual Research Report
    • Invited
  • [Presentation] Long time behavior of the volume of the Wiener sausage on Dirichlet spaces2017

    • Author(s)
      Kazuki Okamura
    • Organizer
      Potential Analysis and Related Fields 2017
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Some results for range of random walk on graph with spectral dimension two2017

    • Author(s)
      Kazuki Okamura
    • Organizer
      16th Stochastic Analysis on Large Scale Interacting Systems
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Quenched large deviations for simple random walks on percolation models including long-range correlations2017

    • Author(s)
      Kazuki Okamura
    • Organizer
      PIMS-CRM Probability Summer School 2017
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Some results for range of random walk on graph with spectral dimension two2017

    • Author(s)
      Kazuki Okamura
    • Organizer
      47th Saint-Flour Probability Summer school
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Some results for range of random walk on graph with spectral dimension two2017

    • Author(s)
      岡村和樹
    • Organizer
      東京確率論セミナー
    • Related Report
      2017 Annual Research Report
  • [Presentation] Quenched large deviations for simple random walks on percolation models including long-range correlations2017

    • Author(s)
      岡村和樹
    • Organizer
      関西確率論セミナー
    • Related Report
      2017 Annual Research Report
  • [Presentation] Long time behavior of the volume of the Wiener sausage on Dirichlet spaces2016

    • Author(s)
      岡村和樹
    • Organizer
      確率論シンポジウム
    • Place of Presentation
      京都大学、京都府京都市
    • Year and Date
      2016-12-19
    • Related Report
      2016 Annual Research Report
  • [Presentation] Long time behavior of the volume of the Wiener sausage on Dirichlet spaces2016

    • Author(s)
      岡村和樹
    • Organizer
      確率解析とその周辺
    • Place of Presentation
      九州大学、福岡県福岡市
    • Year and Date
      2016-11-09
    • Related Report
      2016 Annual Research Report
  • [Presentation] On the volume of the Wiener sausage in local Dirichlet spaces2016

    • Author(s)
      岡村和樹
    • Organizer
      確率論サマースクール
    • Place of Presentation
      信州大学、長野県松本市
    • Year and Date
      2016-09-07
    • Related Report
      2016 Annual Research Report
  • [Presentation] Unions of random walk and Bernoulli percolation2016

    • Author(s)
      岡村和樹
    • Organizer
      確率論ヤングサマーセミナー
    • Place of Presentation
      伊勢市二見公民館、三重県伊勢市
    • Year and Date
      2016-08-12
    • Related Report
      2016 Annual Research Report
  • [Presentation] Enlargement of subgraphs of infinite graphs by Bernoulli percolation2016

    • Author(s)
      Kazuki Okamura
    • Organizer
      Simons Conference on Random Graph processes 2016 (Poster session)
    • Place of Presentation
      テキサス州オースティン、アメリカ
    • Year and Date
      2016-05-11
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Remarks]

    • URL

      http://soar-rd.shinshu-u.ac.jp/profile/ja.ZefmuUkV.html

    • Related Report
      2017 Annual Research Report
  • [Remarks] Kazuki Okamura's homepage

    • URL

      http://www.kurims.kyoto-u.ac.jp/~kazukio/

    • Related Report
      2016 Annual Research Report

URL: 

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

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