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Study on spherical functions on Lie groups and automorphic L-functions

Research Project

Project/Area Number 21740028
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeSingle-year Grants
Research Field Algebra
Research InstitutionSeikei University

Principal Investigator

ISHII Taku  成蹊大学, 理工学部, 准教授 (60406650)

Project Period (FY) 2009 – 2011
Project Status Completed (Fiscal Year 2011)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2011: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2010: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2009: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords保型形式 / 保型 L 関数 / Rankin-Selberg 法 / Whittaker 模型 / Whittaker 関数 / 主系列表現 / Rankin-Selberg法 / アルキメデスゼータ積分 / Whittaker関数
Research Abstract

The aim of our study is to establish fundamental results on zeta functions for automorphic forms (automorphic L-functions) such as the analytic continuations and the functional equations, through their integral representations (zeta integrals). Using explicit formulas for generalized spherical functions, that is, special functions appearing in the Fourier expansions of automorphic forms, we have computed archimedean zeta integrals. Especially we calculate the archimedean zeta integrals for the L-functions on SO(2n+1)×GL(m) and the standard L-function on GL(3) and obtained the local and the global functional equations.

Report

(4 results)
  • 2011 Annual Research Report   Final Research Report ( PDF )
  • 2010 Annual Research Report
  • 2009 Annual Research Report
  • Research Products

    (13 results)

All 2013 2012 2011 2010 2009 Other

All Journal Article (6 results) (of which Peer Reviewed: 5 results) Presentation (7 results) (of which Invited: 2 results)

  • [Journal Article] Archimedean zeta integrals on GL_n × GL_m and SO_{2n+1} × GL_m2013

    • Author(s)
      Taku Ishii and Eric Stade
    • Journal Title

      Manuscripta Mathematica

      Volume: 141 Issue: 3-4 Pages: 485-536

    • DOI

      10.1007/s00229-012-0581-y

    • Related Report
      2011 Final Research Report
    • Peer Reviewed
  • [Journal Article] Whittaker functions on orthogonal groups of odd degree2013

    • Author(s)
      ku Ishii
    • Journal Title

      Journal of Lie Theory

      Volume: 23 Pages: 85-112

    • URL

      http://www.heldermann.de/JLT/JLT23/jlt23.htm

    • Related Report
      2011 Final Research Report
    • Peer Reviewed
  • [Journal Article] The Archimedean Whittaker functions on GL_3, Geometry and analysis of automorphic forms of several variables2012

    • Author(s)
      Miki Hirano, Taku Ishii and Takayuki Oda
    • Journal Title

      World Scientific Publication, Hackensack, NJ

      Volume: volume 7 Pages: 77-109

    • URL

      http://www.worldscientific.com/worldscibooks/10.1142/8192

    • Related Report
      2011 Final Research Report
    • Peer Reviewed
  • [Journal Article] The Archimedean Whittaker functions on GL(3)2012

    • Author(s)
      Miki Hirano, Taku Ishii and Tadashi Miyazaki
    • Journal Title

      Series on Number Theory and its Applications

      Volume: 7 Pages: 77-109

    • Related Report
      2011 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Whittaker functions on real semisimple Lie groups of rank two2010

    • Author(s)
      Taku Ishi
    • Journal Title

      Canadian Journal of Mathematics

      Volume: 62 Issue: 3 Pages: 563-581

    • DOI

      10.4153/cjm-2010-030-4

    • Related Report
      2011 Final Research Report 2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Uniqueness of generalized Whittaker models for GSp(2,R) and the outer automorphism group of Sp(2,R)2010

    • Author(s)
      Taku Ishii and Tomonori Moriyama
    • Journal Title

      京都大学数理解析研究所講究録

      Volume: 1715 Pages: 121-126

    • URL

      http://www.kurims.kyoto-u.ac.jp/~kyodo/kokyuroku/contents/pdf/1715-13.pdf

    • Related Report
      2011 Final Research Report
  • [Presentation] Archimedean zeta integrals for automorphic L-functions2012

    • Author(s)
      Taku Ishii
    • Organizer
      L-functions of automorphic forms and related problems
    • Place of Presentation
      東京大学数理科学研究科
    • Year and Date
      2012-03-10
    • Related Report
      2011 Final Research Report
  • [Presentation] Archimedean zeta integrals for exterior square L-functions on GL(4)2011

    • Author(s)
      Taku Ishii
    • Organizer
      第6回福岡数論研究集会
    • Place of Presentation
      九州大学
    • Year and Date
      2011-08-24
    • Related Report
      2011 Final Research Report
  • [Presentation] Calculus of archimedean zeta integrals for L-functions on GL(4)2011

    • Author(s)
      Taku Ishii
    • Organizer
      有界対称領域の算術商のコホモロジーとモジュラーサイクル
    • Place of Presentation
      東京大学玉原国際セミナーハウス
    • Year and Date
      2011-08-06
    • Related Report
      2011 Final Research Report
  • [Presentation] リー群上の球関数とアルキメデスゼータ積分2010

    • Author(s)
      Taku Ishii
    • Organizer
      談話会
    • Place of Presentation
      京都大学
    • Year and Date
      2010-12-01
    • Related Report
      2011 Final Research Report
  • [Presentation] Archimedean L-factors for automorphic L-functions2009

    • Author(s)
      Taku Ishii
    • Organizer
      Number theory seminar
    • Place of Presentation
      University of Colorado at Boulder米国
    • Year and Date
      2009-10-15
    • Related Report
      2011 Final Research Report
  • [Presentation] Archimedean zeta integrals for exterior square L-functions on GL(4)

    • Author(s)
      石井卓
    • Organizer
      第6回福岡数論研究集会
    • Place of Presentation
      九州大学
    • Related Report
      2011 Annual Research Report
    • Invited
  • [Presentation] Archimedean zeta integrals for automorphic L-functions

    • Author(s)
      石井卓
    • Organizer
      L-functions of automorphic forms and related problems
    • Place of Presentation
      東京大学数理科学研究科
    • Related Report
      2011 Annual Research Report
    • Invited

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Published: 2009-04-01   Modified: 2016-04-21  

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