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Problems on varieties

Research Project

Project/Area Number 05452001
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field Algebra
Research InstitutionTohoku University

Principal Investigator

ODA Tadao  Tohoku University Faculty of Science Professor, 理学部, 教授 (60022555)

Co-Investigator(Kenkyū-buntansha) ISHIDA Masanori  Tohoku University Faculty of Science Associate Professor, 理学部, 助教授 (30124548)
NISHIKAWA Seiki  Tohoku University Faculty of Science Professor, 理学部, 教授 (60004488)
MORITA Yasuo  Tohoku University Faculty of Science Professor, 理学部, 教授 (20011653)
SUNADA Toshikazu  Tohoku University Faculty of Science Professor, 理学部, 教授 (20022741)
HOTTA Ryoshi  Tohoku University Faculty of Science Professor, 理学部, 教授 (70028190)
Project Period (FY) 1993 – 1994
Project Status Completed (Fiscal Year 1994)
Budget Amount *help
¥4,800,000 (Direct Cost: ¥4,800,000)
Fiscal Year 1994: ¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1993: ¥2,700,000 (Direct Cost: ¥2,700,000)
Keywordstoric variety / rational point / p-adic analytic space / equivariant holonomic system / quantum group / harmonic map / electro-magnetic field / Einstein-Hermitian metric / モーデル・ヴェイユ群 / 一般ヤコビ多様体 / ヤン・バックスター方程式 / スペクトル幾何 / アインシュタイン計量
Research Abstract

1. From the viewpoints of algebraic geometry, arithmetic geometry and complex analytic geometry, various important results were obtained on the intersection cohomology of toric varieties, Fano varieties, elliptic surfaces in positive characteristics and logarithmic schemes.
2. From the viewpoints of number theory and arithmetic geometry, new results were obtaied on rational points on algebraic varieties, algebraic surfaces in particular, as well as p-adic analytic surfaces.
3. From the viewpoints of algebraic analysis, representation theory and mathematical physics, progress was made on equivariant holonomic systems on alegbraic varieties, p-adic symmetric spaces, nonequilibrium models, representations of quantum groups and conformal field theory.
4. From the viewpoints of global analysis, differential geometry and complex geometry, new results were obtained on harmonic maps, harmonic foliations, the geometry and quantum ergodicity of eletro-magnetic fields, Einstein-Hermitian metrics, quivers as well as self-dual metrics.
We were able to obtain these results thanks to easy access to databases on voluminous results on varieties made possible through this grant. Specialists on various different viewpoints freely got together, provided individual insights and and ideas to build up comprehensive results. We tried to communicate our results to relevant experts throughout the world.

Report

(3 results)
  • 1994 Annual Research Report   Final Research Report Summary
  • 1993 Annual Research Report
  • Research Products

    (62 results)

All Other

All Publications (62 results)

  • [Publications] 小田忠雄: "トーリック多様体論の最近の発展" 数学. 46. 35-47 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Tadao Oda: "Recent topics on toric varieties" Sugaku Expositions,Amer.Math.Soc.22GD02:(印刷中).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Kazuo Akutagawa: "Harmonic maps of unbounded convex polyhedra in hyperbolic spaces" Invent.Math.115. 391-404 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Toshikazu Sunada: "A discrete analogue of periodic magnetic Schrodinger operators" Contemporary Math.173. 283-299 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Toshikazu Sunada: "Euclidean versus non‐Euclidean aspects in spectral geometry" Progress in Theoretical Phys.Supplement. 116. 235-250 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Shigetoshi Bando: "Stable sheaves and Einstein‐Hermitian metrics" “Geometry and Analysis on Complex Manifolds". (印刷中).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Hiraku Nakajima: "Homology of moduli spaces of instantons on ALE spaces(I)" J.of Differential Geom.40. 105-127 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Hiraku Nakajima: "Instantons on ALE spaces,quiver varieties,and Kac‐Moody algebras" Duke Math.J.76. 365-416 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Shin Nayatani: "Morse indices of Yang‐Mills connections over the unit sphere" Compositio Mathematica.(印刷中).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Koji Hasegawa: "L‐opeators for Belavin's R‐matrix acting on the space of theta functions" J.Math.Phys.35. 6158-6171 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Yasuhiro Nakagawa: "Classification of Einstein‐Kahler toric Fano fourfolds" Tohoku Math.J.46. 125-133 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Hiroyuki Ito: "The Mordell‐Weil groups of unirational quasi‐elliptic surfaces in characteristic 2" Tohoku Math.J.46. 221-251 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 堀田良之 谷崎俊之: "D加群と代数群" シュプリンガー・フェアラーク東京., 300 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Takeshi Kotake,Seiki Nishikawa and Richard Schoen: "Geometry and Global Analysis." 東北大学理学部数学教室, 510 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Ryoshi Hotta and Toshiyuki Tanisaki: "D-modules and Algebraic Groups (in Japanese)" Springer, Tokyo. (to appear). 300 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Takeshi Kotake, Seiki Nishikawa and Richard Schoen: "Geometry and Global Analysis, Report of the First MSJ International Research Institute" Mathematical Institute, Tohoku University. 510 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Tadao Oda: "Recent developments on toric varieties (in Japanese)" Sugaku. 46, No.4. 35-47 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Tadao Oda: "Recent topics on toric varieties" Sugaku Expositions, Amer.Math.Soc.(to appear).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Kazuo Akutagawa, Seiki Nishikawa and Atsushi Tachikawa: "Harmonic maps of unbounded convex polyhedra in hyperbolic spaces" Invent.Math.115. 391-404 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Toshikazu Sunada: "A discrete analogue of periodic magnetic Schrodinger operators" Contemporary Math.173. 283-299 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Toshikazu Sunada: "Euclidean versus non-Euclidean aspects in spectral geometry" Progress in Theoretical Phys.Supplement. 116. 235-250 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Shigetoshi Bando and Yum-Tong Siu: "Stable sheaves and Einstein-Harmitian metrics" "Geometry and Analysis on Complex Manifelds"(T.Mabuchi, J.Noguchi and T.Ochiai, eds.), World Scientific Publ.Co., Inc., London, Singapore. (to appear). (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] N.Inui, M.Katori and Tohru Uzawa: "Duality and universality in nonequilibrium models" J.Phys.A. : Math.Gen.to appear.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Hiraku Nakajima: "Homology of moduli spaces of instantons on ALE spaces(I)" J.of Differential Geom.40. 105-127 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Hiraku Nakajima: "Resolutions of moduli spaces of ideal instantons on R^4" Topology, Geometry and Fied Theory, World Scientific. 129-136 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Hiraku Nakajima: "Instantons on ALE spaces, quiver varieties, and Kac-Moody algebras" Duke Math.76. 365-416 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Shin Nayatani and Hajime Urakawa: "Morse indices of Yang-Mills connections over the unit sphere" Compositio Mathematica. (to appear).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Koji Hasegawa: "L-opeators for Belavin's R-matrix acting on the space of theta functions" J.Math. Phys.35(11). 6158-6171 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Yasuhiro Nakagawa: "Classification of Einstein-Kahler toric Fano fourfolds" Tohoku Math.J.46. 125-133 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Hiroyuki Ito: "The Mordell-Weil groups of unirational quasi-elliptic surfaces in characteristic 2" Tohoku Math.J.46. 221-251 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 小田忠雄: "トーリック多様体論の最近の発展" 数学. 46. 35-47 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Tadao Oda: "Recent topics on toric varieties" Sugaku Expositions,Amer.Math.Soc.(印刷中).

    • Related Report
      1994 Annual Research Report
  • [Publications] Kazuo Akutagawa: "Harmonic maps of unbounded convex polyhedra in hyperbolic spaces" Invent.Math.115. 391-404 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Toshikazu Sunada: "A discrete analogue of periodicmagnetic Schrodinger operators" Contemporary Math.173. 283-299 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Toshikazu Sunada: "Euclidean versus non-Euclidean aspects in spectral geometry" Progress in Theoretical Phys.Supplement.116. 235-250 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Shigetoshi Bando: "Stable sheaves and Einstein-Hermitian metrics" “Geometry and Analysis on Complex Manifolds"World Scientific. (印刷中).

    • Related Report
      1994 Annual Research Report
  • [Publications] Hiraku Nakajima: "Homology of moduli spaces of instantons on ALE spaces(1)" J.of Differential Geom.40. 105-127 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Hiraku Nakajima: "Instantons on ALE spaces,quivervarieties,and Kac-Moody algebras" Duke Math.J.76. 365-416 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Shin Nayatani: "Morse indices of Yang-Mills connections over the unit sphere" Compositio Mathematica.(印刷中).

    • Related Report
      1994 Annual Research Report
  • [Publications] Koji Hasegawa: "L-opeators for Belavin's R-matrix acting on the space of theta functions" J.Math.Phys.35(11). 6158-6171 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Yasuhiro Nakagawa: "Classification of Einstein-Kahler toric Fano fourfolds" Tohoku Math.J.46. 125-133 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Hiroyuki Ito: "The Mordell-Weil groups of uniratonal quasi-elliptic aurfaces in characteristic 2" Tohoku Math.J.46. 221-251 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 堀田良之 谷崎俊之: "D加群と代数群" シュプリンガー・フェアラーク東京(1995年春刊行予定), 300

    • Related Report
      1994 Annual Research Report
  • [Publications] Takeshi Kotake,Seiki Nishikawa and Richard Schoen 東北大学理学部数学教室: "Geometry and Global Analysis," 510 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Tadao Oda: "The algebraic de Rham theorem for toric varieties." Tohoku Math.J.45. 231-247 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] Ryoshi Hotta: "Equivariant D-modules." Proc.ICPAM Wuhan Spring School,Hermann,Paris. (出版予定).

    • Related Report
      1993 Annual Research Report
  • [Publications] Seiki Nishikawa(K.Akutagawa): "Harmonic maps between unbounded convex polyhedra in hyperbolic spaces." Invent.Math.(出版予定).

    • Related Report
      1993 Annual Research Report
  • [Publications] Toshikazu Sunada(T.Adachi): "The densities of states in spectral geometry." Comment.Math.Helvetici. 68. 480-493 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] Toshikazu Sunada: "A discrete analogue of periodic magnetic Schrodinger operators." Contemporary Math.(出版予定).

    • Related Report
      1993 Annual Research Report
  • [Publications] Toshikazu Sunada: "Magnetic flows on a Riemann surface." Proc.of KAIST Symposium. (出版予定).

    • Related Report
      1993 Annual Research Report
  • [Publications] Shin Nayatani(S.Kato): "Complete conformal metrics with prescribed scalar curvature on subdomains of a compact manifold." Nagoya Math.J.132. 155-173 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] Koji Hasegawa: "Crossing symmetry in elliptic solution of the Yang-Baxter equation and a new L operator for Belavin's solution." J.Physics,A:Math.Gen.26. 3211-3228 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] Hiroyuki Ito: "The Mordell-Weil groups of unirational quasi-elliptic surfaces in characteristic 2." Tohoku Math.J.46(出版予定). (1994)

    • Related Report
      1993 Annual Research Report
  • [Publications] Yasuhiro Nakagawa: "Einstein-Kahler toric Fano fourfolds." Tohoku Math.J.45. 297-310 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] Yasuhiro Nakagawa: "Classification of Einstein-Kahler toric Fano fourfolds." Tohoku Math.J.46. 125-133 (1994)

    • Related Report
      1993 Annual Research Report
  • [Publications] Takeshi Kajiwara: "Logarithmic compactifications of the generalized Jacobian variety." J.Fac.Sci.Univ.Tokyo,Sect.IA,Math.40. 473-502 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] Toshikazu Sunada: "Euclidean versus non-Euclidean aspects in spectral geometry." Progress in Theoretical Physics. (出版予定).

    • Related Report
      1993 Annual Research Report
  • [Publications] Shigetoshi Bando: "Einstein-Hermitian metrics on open Kahler manifolds." Lecture Notes in Pure and Appl.Math.,Marcel Dekker. 27-33 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] Hiraku Nakajima: "Monopoles and Nahm's equations." Lecture Notes in Pure and Appl.Math.,Marcel Dekker. 193-211 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] Hiraku Nakajima: "Homology of moduli spaces of instantons on ALE spaces(1)" J.Dirrerential Geom.(出版予定).

    • Related Report
      1993 Annual Research Report
  • [Publications] Hiraku Nakajima: "Gauge theory on resolutions of simple singularities and simple Lie algebras." International Math.Research Notes. (出版予定).

    • Related Report
      1993 Annual Research Report
  • [Publications] Shin Nayatani: "Morse index and Gauss maps of complete minimal surfaces in Euclidean 3-space." Comment.Math.Helvetici. 68. 511-537 (1993)

    • Related Report
      1993 Annual Research Report

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Published: 1993-04-01   Modified: 2016-04-21  

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