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木の上のランダムウォークと超距離空間上の確率過程

Research Project

Project/Area Number 14J01798
Research Category

Grant-in-Aid for JSPS Fellows

Allocation TypeSingle-year Grants
Section国内
Research Field Basic analysis
Research InstitutionKyoto University

Principal Investigator

鈴木 康平  京都大学, 理学研究科, 特別研究員(DC2)

Project Period (FY) 2014-04-25 – 2016-03-31
Project Status Completed (Fiscal Year 2015)
Budget Amount *help
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 2015: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2014: ¥1,000,000 (Direct Cost: ¥1,000,000)
KeywordsBrown運動 / Ricci曲率 / 弱収束 / GH収束 / Brown運動の収束 / 測度距離空間
Outline of Annual Research Achievements

本年度は, 測度距離空間上のBrown運動の収束について研究した. Brown運動は, 測度距離空間のdataだけから決まる標準的な拡散過程である. そのため, 空間の幾何学的な情報とBrown運動の確率過程としての振る舞いは関係しているはずである. 本年度は, 収束という点に着目して研究を行った . 測度距離空間上には, measured Gromov-Hausdorff収束という幾何学的な収束概念がある. 一方で, Brown運動には, 確率過程の弱収束という確率的な収束概念がある. 本年度の研究によって, この異なる2つの収束概念が, RCD条件と呼ばれるRicci曲率を下から抑えられた空間のクラスを考えた場合は同値であるという事がわかった. この結果によって, 空間の幾何学的収束とBrown運動の確率的な収束の関係が明らかになった. RCD条件を満たす空間は, Ricci曲率が下から抑えられたRiemann多様体だけでなく, そのmeasured Gromov-Hausdorff極限空間のような特異点をもつ多様体ではない空間などが含まれている. また, 今回の結果は有限次元空間だけでなく, 無限次元空間を含む設定で結果が得られている. 例えば, Ric曲率が下から抑えられた Riemann多様体上の配置空間などが含まれる. Riemann多様体上の配置空間は, Riemann多様体上の可算無限個の Bronw運動の配置全体を表現した空間である.

Research Progress Status

27年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

27年度が最終年度であるため、記入しない。

Report

(2 results)
  • 2015 Annual Research Report
  • 2014 Annual Research Report
  • Research Products

    (16 results)

All 2016 2015 2014 Other

All Journal Article (5 results) (of which Acknowledgement Compliant: 2 results,  Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (10 results) (of which Int'l Joint Research: 3 results,  Invited: 3 results) Remarks (1 results)

  • [Journal Article] リーマン的曲率次元条件を満たす測度距離空間上のBrown運動の収束2016

    • Author(s)
      鈴木康平
    • Journal Title

      第 7 回白浜研究 集会報告集

      Volume: 1 Pages: 39-46

    • Related Report
      2015 Annual Research Report
    • Acknowledgement Compliant
  • [Journal Article] Non-separability of the Lipschitz distance2015

    • Author(s)
      Kohei Suzuki, Yohei Yamazaki
    • Journal Title

      Pacific Journal of Mathematics for Industry

      Volume: 7 Issue: 1 Pages: 1-7

    • DOI

      10.1186/s40736-015-0013-5

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Convergence and projection Markov property of Markov processes on ultrametric spaces2014

    • Author(s)
      Kohei Suzuki
    • Journal Title

      RIMS Journal

      Volume: 50(3) Issue: 3 Pages: 569-588

    • DOI

      10.4171/prims/144

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed
  • [Journal Article] On instability of global path properties of symmetric Markov processes under Mosco convergence2014

    • Author(s)
      Kohei Suzuki, Toshihiro Uemura
    • Journal Title

      数理解析研究所講究録

      Volume: 1903 Pages: 193-197

    • Related Report
      2014 Annual Research Report
    • Open Access
  • [Journal Article] 超距離空間上のマルコフ過程について2014

    • Author(s)
      鈴木康平
    • Journal Title

      第5回白浜研究集会報告集

      Volume: 1 Pages: 141-144

    • Related Report
      2014 Annual Research Report
  • [Presentation] Convergence of Brownian motions on RCD spaces2016

    • Author(s)
      K.Suzuki
    • Organizer
      Workshop on Stochastic Analysis and Related Topics 2016
    • Place of Presentation
      Dresden工科大学
    • Year and Date
      2016-05-09
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Equivalence between convergence of Brownian motions and convergence of metric measure spaces satisfying RCD*(K,N) conditions2016

    • Author(s)
      K.Suzuki
    • Organizer
      KTGU Mathematics Workoshop for Young Researchers
    • Place of Presentation
      京都大学
    • Year and Date
      2016-02-23
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Convergence of Brownian motions on RCD*(K,N) spaces2015

    • Author(s)
      K.Suzuki
    • Organizer
      確率論シンポジウム
    • Place of Presentation
      岡山大学
    • Year and Date
      2015-12-15
    • Related Report
      2015 Annual Research Report
  • [Presentation] Convergence of Brownian motions on RCD*(K,N) spaces2015

    • Author(s)
      K.Suzuki
    • Organizer
      Stochastic seminar in Bonn University
    • Place of Presentation
      Bonn大学
    • Year and Date
      2015-11-04
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Convergence of Brownian motions on RCD*(K,N) spaces2015

    • Author(s)
      k.Suzuki
    • Organizer
      幾何学シンポジウム
    • Place of Presentation
      東京理科大学
    • Year and Date
      2015-08-27
    • Related Report
      2015 Annual Research Report
    • Invited
  • [Presentation] Convergence of continuous stochastic processes on compact metric spaces converging in the Lipschitz distance2015

    • Author(s)
      Kohei Suzuki
    • Organizer
      Stochastic Seminar in Bonn university
    • Place of Presentation
      Bonn 大学
    • Year and Date
      2015-01-29
    • Related Report
      2014 Annual Research Report
  • [Presentation] Convergence of continuous stochastic processes on compact metric spaces converging in the Lipschitz distance2014

    • Author(s)
      Kohei Suzuki
    • Organizer
      Dirichlet forms and Stochastic analysis
    • Place of Presentation
      Dresden工科大学
    • Year and Date
      2014-10-26
    • Related Report
      2014 Annual Research Report
  • [Presentation] Convergence of continuous stochastic processes on compact metric spaces converging in the Lipschitz distance2014

    • Author(s)
      Kohei Suzuki
    • Organizer
      確率論と幾何学
    • Place of Presentation
      東京工業大学
    • Year and Date
      2014-09-22
    • Related Report
      2014 Annual Research Report
  • [Presentation] A complete metric among pairs of compact metric spaces and probability measures on paths spaces2014

    • Author(s)
      Kohei Suzuki
    • Organizer
      東北大学確率論セミナー
    • Place of Presentation
      東北大学
    • Year and Date
      2014-08-01
    • Related Report
      2014 Annual Research Report
  • [Presentation] A complete metric among pairs of compact metric spaces and probability measures on paths spaces2014

    • Author(s)
      Kohei Suzuki
    • Organizer
      関西確率論セミナー
    • Place of Presentation
      京都大学
    • Year and Date
      2014-07-25
    • Related Report
      2014 Annual Research Report
  • [Remarks] Kohei Suzuki's Home page

    • URL

      http://www.genome.med.kyoto-u.ac.jp/~ksuzuki/index.html

    • Related Report
      2015 Annual Research Report

URL: 

Published: 2015-01-22   Modified: 2024-03-26  

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