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2007 Fiscal Year Final Research Report Summary

Boundary value problems and Index Theorem for D Modules

Research Project

Project/Area Number 16540150
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Basic analysis
Research InstitutionOsaka University

Principal Investigator

UCHIDA Motoo  Osaka University, Graduate School of Science Depantment of Mathematics, Associate Professor (10221805)

Co-Investigator(Kenkyū-buntansha) NISHITANI Tatsuo  Osaka University, Graduate School of Science, Dept. Math., Professor (80127117)
Project Period (FY) 2004 – 2007
KeywordsD Modules / boundary value problem / microlocal analysis
Research Abstract

We have found an idea to formulate elliptic boundary value problems for systems of differential equations in terms of D-Modules and to construct their characteristic cycles (or microlocal Euler classes). Let us consider a system of differential equations M on a manifold M with boundary N. Let M_<tan> denote its pull back to the boundary. Given a system of differential equations N on the boundary and a D_N linear morphism α: N → M_<tan>. By definition, this boundary value problem is said to be elliptic if a induces an isomorphism from ε_N [○!×] N to a coherent quotient module M^+(tan)of ε_N [○!×] M^<tan> defined microlocally from the boundary. (ε_N is the sheaf of rings of microdifferential operators on the boundary.) It is still difficult to construct a characteristic cycle in this naive setting, and we want to translate this setting of BVP as a module (or an object of a derived category of modules) over some ring. If we introduce the ring BD as BD = D_M [○!+] D(N,M) [○!+]D_N, we can get an object B (M, N) of the derived category D^b(D_M [○!×] B), with B the ring of upper half triangle matrices of degree 2. One can possibly define a characteristic cycle (or a microlocal Euler class) associated to the pair of a D_M [○!×]B-module and a B-module (Z_M, Z_N) by the diagonal argument under the condition of ellipticity of α. We expect that one can prove (by chasing diagrams) an index theorem for boundary value problems in terms of characteristic classes defined here, since their construction is almost totally functorial.

  • Research Products

    (6 results)

All 2008 2007

All Journal Article (6 results) (of which Peer Reviewed: 3 results)

  • [Journal Article] On the Cauchy problem for non effectively hyperbolic operatone, the Iurii-Petkou-Hormandes cond-ition and the Gevrey2008

    • Author(s)
      T. Nishitani
    • Journal Title

      Serdica Math. Jowmal well posednees 34

      Pages: 1001-1024

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] On the Cauchy problem for non effectively Puypertolic operatore, the Iwcu-Petkov-Hormanden condition and the Gevreg well poeedness2008

    • Author(s)
      T., Nishitani
    • Journal Title

      Sendica Math. Journal 34

      Pages: 1001-1024

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] An example of the Canchy problem well posed in any Geviey claee2007

    • Author(s)
      F. Colombini・T. Nishitani
    • Journal Title

      Annali di Matematica 186

      Pages: 621-643

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] Second osdes weakly hyperbolic operators with coefficients sum of powers of functions2007

    • Author(s)
      F. Colombini・T. Nishitani
    • Journal Title

      Osaka Jownal of Mathematics 44

      Pages: 121-137

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] An example of the Canchy Problem well pored in any Georey class2007

    • Author(s)
      F., Colombini, T., Nishitani
    • Journal Title

      Annali di Matematica 186

      Pages: 621-643

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Second order weakly Puypertolic oreatoce with coefficiente sum of powers of functionce2007

    • Author(s)
      F., Colombini, T., Nishitani
    • Journal Title

      Osaka Journal of Matheratice 44

      Pages: 121-137

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2010-02-04  

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