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2012 Fiscal Year Annual Research Report

写像の特異点論の新展開

Research Project

Project/Area Number 23244008
Research InstitutionKyushu University

Principal Investigator

佐伯 修  九州大学, マス・フォア・インダストリ研究所, 教授 (30201510)

Co-Investigator(Kenkyū-buntansha) 岩瀬 則夫  九州大学, 数理(科)学研究科(研究院), 教授 (60213287)
大本 亨  北海道大学, 理学(系)研究科(研究院), 教授 (20264400)
與倉 昭治  鹿児島大学, 理工学研究科, 教授 (60182680)
鎌田 聖一  広島大学, 理学(系)研究科(研究院), 教授 (60254380)
佐久間 一浩  近畿大学, 理工学部, 教授 (80270362)
Project Period (FY) 2011-05-31 – 2016-03-31
Keywords可微分写像 / 特異点 / 不変量 / 特異Lefschetz束 / 同境 / 特性類 / 国際研究者交流 / フランス:ドイツ:ブラジル
Research Abstract

写像の特異点論を,大域的観点,幾何構造付きでの観点等の新たな観点から見直し,数学の現代的潮流の中での特異点論の新たな展開・発展の様々な方向性をさぐることが大きな目的である.そのため平成24年度は,特異シンプレクティック構造と特異Lefschetz束構造の変形理論の研究を進め,4次元多様体から閉曲面へのどんな写像も特異Lefschetz束であって,折り目特異点像が埋め込まれているものにホモトピーで変形できることを構成的に示すことに成功した.また,ホモロジー的条件さえ満たせば,どのような1次元部分多様体も折り目特異点集合として実現可能であることを示した.さらに,複素超曲面特異点に付随した結び目の同境について調べ,Brieskorn型多項式で定義される場合,その指数が多くの場合に同境不変量となることを示した.これは特異点の同変指数が結び目の同境不変量であることを巧みに利用することによって示された.さらに,より一般の擬斉次多項式についても,ある場合には重みが同境不変量となることを示した.さらに,一般的な可微分写像のStein分解が三角形分割可能であることを示し,応用としていくつかのオイラー標数公式を得た.また,特異多様体の特性類の研究も進め,特にChern-Schwartz-MacPherson classについて詳しく調べた.モチビックHirzebruch classについても調べ,さらにproalgebraic varietiesの特性類と,モチビック測度の関係についても研究した.また,こうした特性類をThom多項式との関連の観点からも研究した.さらに,特異写像の特異点消去を,はめ込み・埋め込みリフトの観点からも研究し,スペシャル・ジェネリック写像についてそうしたリフトが存在するための条件について詳しく調べた.

Current Status of Research Progress
Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

平成24年度に予定していた研究がほぼ予定通りに進行している.特に,特異点解消の観点から,埋め込み・はめ込みリフトの存在性問題を考えると,微分トポロジーにおける古典的諸結果と大きな関係があり,そうした事柄が問題の解決に重要な役割を果たすことに気が付いたことは,今後につながる大きな収穫であった.また,Lefschetz束の変形理論を特異点論的立場から整備することができたことも大きな成果である.

Strategy for Future Research Activity

予定通り,多様体の大域的構造と写像の特異点について(特に,可微分構造の「差」の代数的表現について),多様体の同境理論に基づいた有限型不変量・量子不変量の定式化について,特異Lefschetz 束構造の変形理論の展開について,複素超曲面特異点の位相型について,特異多様体の特性類について,特異点・特異ファイバーの消去のためのホモトピー論的障害について,研究を進めてゆく.特に,埋め込み・はめ込みリフトの存在・非存在と可微分構造の差の関係について重点的に研究を進めて行く予定である.また,特異Lefschetz束を用いた4次元多様体の不変量についても,特異点論的観点から研究を進めて行く.

  • Research Products

    (48 results)

All 2013 2012 Other

All Journal Article (14 results) (of which Peer Reviewed: 13 results) Presentation (31 results) (of which Invited: 21 results) Book (1 results) Remarks (1 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Triangulating Stein factorizations of generic maps and Euler characteristic formulas2013

    • Author(s)
      J. T. Hiratuka and O. Saeki
    • Journal Title

      RIMS Kokyuroku Bessatsu

      Volume: B38 Pages: 61-89

    • Peer Reviewed
  • [Journal Article] Characteristic classes of Hilbert schemes of points via symmetric products2013

    • Author(s)
      L. Maxim, S. Cappell, T. Ohmoto, J. Schuermann, and S. Yokura
    • Journal Title

      Geometry and Topology

      Volume: 未定 Pages: 出版予定

    • Peer Reviewed
  • [Journal Article] Cobordism of exact links2012

    • Author(s)
      V. Blanloeil and O. Saeki
    • Journal Title

      Algebraic and Geometric Topology

      Volume: 12 Pages: 1443-1455

    • DOI

      10.2140/agt.2012.12.1443

    • Peer Reviewed
  • [Journal Article] Vassiliev type invariants for generic maps, revisited2012

    • Author(s)
      T. Ohmoto
    • Journal Title

      Contemporary Math., Amer. Math. Soc.

      Volume: 569 Pages: 143-160

    • Peer Reviewed
  • [Journal Article] A note on Chern-Schwartz-MacPherson class2012

    • Author(s)
      T. Ohmoto
    • Journal Title

      IRMA Lectures in Mathematics and Theoretical Physics, European Math. Soc.

      Volume: 20 Pages: 117-132

    • Peer Reviewed
  • [Journal Article] The Milnor-Stasheff filtration on spaces and generalized cyclic maps2012

    • Author(s)
      N. Iwase, M. Mimura, N. Oda, and Yeon Soo Yoon
    • Journal Title

      Canad. Math. Bull.

      Volume: 55 Pages: 523-536

    • Peer Reviewed
  • [Journal Article] Grothendieck groups and a categorification of additive invariants2012

    • Author(s)
      J. Schurmann and S. Yokura
    • Journal Title

      Internat. J. Math.

      Volume: 23 Pages: 1250057 1-37

    • DOI

      10.1142/S0129167X12500577

    • Peer Reviewed
  • [Journal Article] Characteristic classes of proalgebraic varieties and motivic measures2012

    • Author(s)
      Shoji Yokura
    • Journal Title

      Algebraic & Geometric Topology

      Volume: 12 Pages: 601-641

    • DOI

      10.2140/agt.2012.12.601

    • Peer Reviewed
  • [Journal Article] Motivic bivariant characteristic classes and related topics2012

    • Author(s)
      J. Schurmann and S. Yokura
    • Journal Title

      J. Singul.

      Volume: 5 Pages: 124-152

    • DOI

      10.5427/jsing.2012.5j

    • Peer Reviewed
  • [Journal Article] Bivariant motivic Hirzebruch class and a zeta function of the motivic Hirzebruch class2012

    • Author(s)
      Shoji Yokura
    • Journal Title

      IRMA Lectures in Mathematics and Theoretical Physics, European Math. Soc.

      Volume: 20 Pages: 285-343

    • DOI

      10.4171/118-1/15

    • Peer Reviewed
  • [Journal Article] Chart description for genus-two Lefschetz fibrations and a theorem on their stabilization2012

    • Author(s)
      Seiichi Kamada
    • Journal Title

      Topology Appl.

      Volume: 159 Pages: 1041-1051

    • DOI

      10.1016/j.topol.2011.11.031

    • Peer Reviewed
  • [Journal Article] Biquandles with structures related to virtual links and twisted links2012

    • Author(s)
      Naoko Kamada and Seiichi Kamada
    • Journal Title

      J. Knot Theory Ramifications

      Volume: 21 Pages: ―

    • DOI

      10.1142/S0218216512400068

    • Peer Reviewed
  • [Journal Article] Braids and branched coverings of dimension three2012

    • Author(s)
      J. Scott Cater and Seiichi Kamada
    • Journal Title

      数理解析研究所講究録

      Volume: 1812 Pages: ―

  • [Journal Article] Erratum to "Topological complexity is a fibrewise L-S category"2012

    • Author(s)
      N. Iwase and M. Sakai
    • Journal Title

      Topology Appl.

      Volume: 159 Pages: 2810-2813

    • Peer Reviewed
  • [Presentation] Low dimensional braids and chart descriptions2013

    • Author(s)
      Seiichi Kamada
    • Organizer
      TAPU Winter Seminar
    • Place of Presentation
      慶北国立大学, テグ(Daegu), 韓国
    • Year and Date
      20130204-20130204
    • Invited
  • [Presentation] Associahedra, multiplihedra and units in A-infinity form2013

    • Author(s)
      Norio Iwase
    • Organizer
      Discrete Geometry and Dynamical Systems
    • Place of Presentation
      京都大学
    • Year and Date
      20130122-20130122
  • [Presentation] Three dimensional braids and their braid monodromies2013

    • Author(s)
      Seiichi Kamada
    • Organizer
      The Ninth East Asian School of Knots and Related Topics
    • Place of Presentation
      東京大学
    • Year and Date
      20130116-20130116
    • Invited
  • [Presentation] A-infinity structures on coalgebras2013

    • Author(s)
      Norio Iwase
    • Organizer
      Geometry and Topology Seminar, University of Glasgow
    • Place of Presentation
      Glasgow, United Kingdom
    • Year and Date
      20130107-20130107
  • [Presentation] 非単純2次元ブレイドのチャート表示について2013

    • Author(s)
      鎌田聖一
    • Organizer
      Hurwitz action とその周辺
    • Place of Presentation
      群馬大学
    • Year and Date
      20130105-20130105
    • Invited
  • [Presentation] Associahedra, multiplihedra and units in A-infinity form2012

    • Author(s)
      Norio Iwase
    • Organizer
      Topology Seminar, University of Aberdeen
    • Place of Presentation
      Aberdeen, United Kingdom
    • Year and Date
      20121220-20121220
  • [Presentation] Geometry of plane-to-plane map-germs2012

    • Author(s)
      大本亨
    • Organizer
      可微分写像の特異点論とその応用
    • Place of Presentation
      日本大学文理学部
    • Year and Date
      20121212-20121212
    • Invited
  • [Presentation] How trees make a shadow in the lattice2012

    • Author(s)
      Norio Iwase
    • Organizer
      Topology Seminar, University of Southampton
    • Place of Presentation
      Southampton, United Kingdom
    • Year and Date
      20121211-20121211
    • Invited
  • [Presentation] Topology of quasi-homogeneous isolated hypersurface singularities2012

    • Author(s)
      佐伯修
    • Organizer
      可微分写像の特異点論とその応用
    • Place of Presentation
      日本大学文理学部
    • Year and Date
      20121210-20121210
    • Invited
  • [Presentation] Branched coverings and braided manifolds of low dimensions2012

    • Author(s)
      Seiichi Kamada
    • Organizer
      Knots in Washington XXXV
    • Place of Presentation
      George Washington University, Washington, DC, USA
    • Year and Date
      20121209-20121209
    • Invited
  • [Presentation] Associahedra, multiplihedra and units in A-infinity form2012

    • Author(s)
      Norio Iwase
    • Organizer
      Topology Seminar, Universidad de Malaga
    • Place of Presentation
      Malaga, Spain
    • Year and Date
      20121205-20121205
    • Invited
  • [Presentation] Associahedra, multiplihedra and units in A-infinity form2012

    • Author(s)
      Norio Iwase
    • Organizer
      Topology Seminar, Universitat Autonoma de Barcelona
    • Place of Presentation
      Barcelona, Spain
    • Year and Date
      20121130-20121130
    • Invited
  • [Presentation] Novas aplicacoes das matematicas na industria2012

    • Author(s)
      Osamu Saeki
    • Organizer
      Palestra, ICMC-USP
    • Place of Presentation
      ICMC-USP, Brazil
    • Year and Date
      20121128-20121128
    • Invited
  • [Presentation] Desingularizar aplicacoes genericas especiais2012

    • Author(s)
      Osamu Saeki
    • Organizer
      Seminario de Singularidades
    • Place of Presentation
      ICMC-USP, Brazil
    • Year and Date
      20121127-20121127
    • Invited
  • [Presentation] Associahedra, multiplihedra and units in A-infinity form2012

    • Author(s)
      Norio Iwase
    • Organizer
      Topology Seminar, Universidade de Santiago de Compostela
    • Place of Presentation
      Santiago de Compostela, Spain
    • Year and Date
      20121127-20121127
    • Invited
  • [Presentation] Desingularizing special generic maps2012

    • Author(s)
      佐伯修
    • Organizer
      東京工業大学 大岡山談話会
    • Place of Presentation
      東京工業大学
    • Year and Date
      20121107-20121107
    • Invited
  • [Presentation] オイラー標数とモチビック特性類2012

    • Author(s)
      與倉昭治
    • Organizer
      2012年度ホモトピー論シンポジウム
    • Place of Presentation
      山口大学
    • Year and Date
      20121102-20121102
  • [Presentation] Motivic Hirzebruch class and its Donaldson-Thomas type analogue2012

    • Author(s)
      Shoji Yokura
    • Organizer
      Harvard/MIT Algebraic Geometry Seminar
    • Place of Presentation
      Harvard University, USA
    • Year and Date
      20121009-20121009
  • [Presentation] Motivic Hirzebruch class and its zeta function2012

    • Author(s)
      Shoji Yokura
    • Organizer
      Algebraic Geometry Seminar
    • Place of Presentation
      Courant Institute of Mathematical Sciences, New York University, USA
    • Year and Date
      20121005-20121005
  • [Presentation] 結び目のカンドル彩色2012

    • Author(s)
      鎌田聖一
    • Organizer
      2012琉球結び目セミナー
    • Place of Presentation
      那覇市ぶんかテンブス館
    • Year and Date
      20120904-20120904
  • [Presentation] On the equivariant systolic category2012

    • Author(s)
      Norio Iwase
    • Organizer
      6th European Congress of Mathematics
    • Place of Presentation
      Krakow, Poland
    • Year and Date
      20120903-20120903
    • Invited
  • [Presentation] Broken Lefschetz fibrations and their moves2012

    • Author(s)
      佐伯修
    • Organizer
      第59回トポロジーシンポジウム
    • Place of Presentation
      佐賀大学
    • Year and Date
      20120813-20120813
    • Invited
  • [Presentation] Presentations of racks, quandles and symmetric quandles2012

    • Author(s)
      Seiichi Kamada
    • Organizer
      TAPU Summer School on Quandle Theory
    • Place of Presentation
      釜山, 韓国
    • Year and Date
      20120724-20120724
    • Invited
  • [Presentation] Singularities and Characteristic Classes for Differentiable Maps I, II, III (course lecture)2012

    • Author(s)
      T. Ohmoto
    • Organizer
      The 12th International Workshop on Real and Complex Singularities
    • Place of Presentation
      ICMC-USP, Brazil
    • Year and Date
      20120723-20120725
    • Invited
  • [Presentation] A-infinity structures on spaces and coalgebras2012

    • Author(s)
      岩瀬則夫
    • Organizer
      トポロジー金曜セミナー,九州大学
    • Place of Presentation
      九州大学
    • Year and Date
      20120720-20120720
  • [Presentation] Graphical description of branched coverings and 2-dimensional braids2012

    • Author(s)
      Seiichi Kamada
    • Organizer
      Mini-symposium, "Knot Theory and its ramifications" at The 6th European Congress of Mathematics
    • Place of Presentation
      Krakow, Poland
    • Year and Date
      20120706-20120706
    • Invited
  • [Presentation] Broken Lefschetz fibrations with embedded fold image2012

    • Author(s)
      佐伯修
    • Organizer
      特異点論と幾何構造
    • Place of Presentation
      長野市生涯学習センター
    • Year and Date
      20120530-20120530
  • [Presentation] A-infinity structures on spaces and coalgebras2012

    • Author(s)
      岩瀬則夫
    • Organizer
      トポロジーセミナー,東京都市大学
    • Place of Presentation
      東京都市大学
    • Year and Date
      20120526-20120526
    • Invited
  • [Presentation] Braids and branched coverings of dimension three2012

    • Author(s)
      Seiichi Kamada
    • Organizer
      Intelligence of Low-dimensional Topology
    • Place of Presentation
      京都大学
    • Year and Date
      20120518-20120518
    • Invited
  • [Presentation] Motivic Hirzebruch classes of singular varieties and related topics2012

    • Author(s)
      Shoji Yokura
    • Organizer
      Algebraic Geometry and Complex Analysis Joint Seminar
    • Place of Presentation
      Univerisitat Wien, オーストリア
    • Year and Date
      20120503-20120503
  • [Presentation] Cobordism of knots associated with complex hypersurface singularities2012

    • Author(s)
      佐伯修
    • Organizer
      トポロジー金曜セミナー,九州大学
    • Place of Presentation
      九州大学
    • Year and Date
      20120413-20120413
    • Invited
  • [Book] Singularities in Geometry and Topology - Strasbourg 2009, IRMA Lectures in Mathematics and Theoretical Physics, Vol. 202012

    • Author(s)
      V. Blanloeil, T. Ohmoto (eds.)
    • Total Pages
      362
    • Publisher
      European Math. Soc.
  • [Remarks] 佐伯修のホームページ

    • URL

      http://imi.kyushu-u.ac.jp/~saeki/index-j.html

  • [Patent(Industrial Property Rights)] 材料組織の幾何学形状の特徴量抽出方法、評価方法、抽出装置及びプログラム2012

    • Inventor(s)
      中川淳一、佐伯修、他、計8名
    • Industrial Property Rights Holder
      新日鐵住金株式会社、国立大学法人九州大学
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      特願2012-260136
    • Filing Date
      2012-11-28

URL: 

Published: 2014-07-24  

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