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Classifications of compact complex manifolds admitting non-isomorphic endomorphisms

Research Project

Project/Area Number 20K03518
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 11010:Algebra-related
Research InstitutionNara Medical University

Principal Investigator

Fujimoto Yoshio  奈良県立医科大学, 医学部, 教授 (90192731)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2022: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2021: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2020: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Keywordsendomorphism / extremal ray / minimal model program / ESP / Atiyah surface / 自己正則写像 / 端射線 / 極小モデル計画 / ベクトル束 / Atiyah 曲面 / FESP / 極小モデルプログラム
Outline of Research at the Start

複素数をn乗する操作は1:1でなく,複素平面に1点を添加して得られる1次元射影代数多様体, リーマン球面上の非同型自己正則写像に延長される. この一般化として, 私の研究目的は、非同型な自己正則写像を数多く持つコンパクト複素多様体の構造を分類論の視点から出来る限り具体的に調べることである. それは楕円曲線やアーベル多様体,トーリック多様体を含むクラスであり, 非常に簡明な構造を持つと予想される. 自己正則写像の系統的研究方法を確立させ,非同型な自己正則写像を持つ多様体の構造研究の一般論を構築したい.

Outline of Final Research Achievements

Classificatioins of smooto projective 3-folds with negative Kodaira dimension which admit a nonisomorphic \'{e}tale endomorphism f has been done: Such varieties can be classified into 6 types. We show that such a variety has at most finite extremal rays R or R is presereved some power of f^k(k > 0). As a consequence, we can apply the eequivariant minimal model program compatibly with \'{e}tale endomorphisms.

Academic Significance and Societal Importance of the Research Achievements

非特異3次元射影代数多様体で非同型な自己正則写像を許す類の分類を完全に遂行した点が際立っている。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (3 results)

All 2023 2022

All Journal Article (3 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 3 results,  Open Access: 3 results)

  • [Journal Article] {E}tale Endomorphisms of 3-Folds. III2023

    • Author(s)
      Yoshio Fujimoto
    • Journal Title

      Kyoto Jounal of Math に掲載予定

      Volume: -

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] \{E}tale Endomorphisms of 3-Folds. II2022

    • Author(s)
      Yoshio Fujimoto
    • Journal Title

      Osaka Journal of Math

      Volume: 59 Pages: 1-14

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Some remarksa on finiteness of extremal rays of divisorial type2022

    • Author(s)
      Yoshio Fujimoto
    • Journal Title

      Proc. of the Japan Acad

      Volume: 98, Ser A, No.1 Pages: 7-12

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access

URL: 

Published: 2020-04-28   Modified: 2024-01-30  

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