Chennai Mathematical Institute

Seminars




Today's Seminar
  • 17-01-19
    2.00 pm, Seminar Hall
    On representation theory of partition algebras for complex reflection groups
    Ashish Mishra
    Visiting professor, Universidade Federal do Para.
    Abstract
    In this talk, we define the partition algebra, denoted by T_{k}(r,p,n), for complex reflection group G(r,p,n) acting on the k-fold tensor product of the reflection representation C^n of G(r,p,n). A basis of the centralizer algebra of this action of G(r,p,n) was given by Tanabe and for p=1, the corresponding partition algebra was studied by Orellana. We also define a subalgebra T_{k+1/2}(r,p,n) and establish this subalgebra as partition algebra of a subgroup of G(r,p,n) acting on the k-fold tensor product of C^n. We call the algebras T_{k}(r,p,n) and T_{k+1/2}(r,p,n) as Tanabe algebras. Our aim is to study the representation theory of Tanabe algebras: parametrization of their irreducible modules by studying the decomposition of the k-fold tensor product of C^n as a G(r,p,n)-module, and construction of Bratteli diagram for the tower of Tanabe algebras.

    We also describe Jucys-Murphy elements of Tanabe algebras and their actions on the Gelfand-Tsetlin basis, determined by the multiplicity-free tower, of irreducible modules.


Today's Seminar
  • 17-01-19
    LECTURE SERIES ANNOUNCEMENT - every Tuesday and Thursday till early March
    3:30 pm, Seminar Hall
    Hyperplane sections of K3 surfaces and Bridgeland stability
    Enrico Arbarello
    Universita di Roma "La Sapienza.
    Abstract
    LECTURE SERIES ANNOUNCEMENT

    Professor Enrico Arbarello, Universita di Roma "La Sapienza", Italy, is visiting CMI for two months. He will give a series of lectures on "Hyperplane sections of K3 surfaces and Bridgeland stability”. The series will start on Thursday, 17th January at 3:30 pm and continue every Tuesday and Thursday till early March.

    Date/time: Tuesday, Thursday, 3:30 pm

    Venue: Lecture Hall 2


Forthcoming Seminars
  • 18-01-19
    10:30--11:45, Seminar Hall
    A 2-Approximation Algorithm for Weighted Feedback Vertex Set in Tournaments(Abstract)
    Geevarghese Philip
    Chennai Mathematical Institute.

  • 25-01-19
    3.30 pm, Lecture Hall 6
    A generalised Korovkin’s Theorem(Abstract)
    Pradipta Bandyopadhyay
    Indian Statistical Institute, Kolkata.

  • 08-02-19
    R.K. Rubugunday Distinguished Lecture
    2.00 pm, Seminar Hall
    R.P. Stanley’s solution of Anand-Dumir-Gupta Conjectures about Magic Squares(Abstract)
    J.K. Verma
    Indian Institute of Technology, Bombay.

Past Seminars (this year)
  • 16-01-19
    3.30 p.m., Seminar Hall
    Higgs bundles and higher Teichmueller spaces(Abstract)
    Oscar Garcia-Prada
    ICMAT, Madrid.

  • 16-01-19
    2:00 pm, Seminar Hall
    Algebraic cycles and the rationality problem(Abstract)
    Kalyan Banerjee
    HRI.

  • 16-01-19
    9:30 am, Seminar Hall
    Modeling Distributed Algorithms by Local Computations with Applications(Abstract)
    Mohamed Mosbah
    LaBRI, University of Bordeaux.

  • 14-01-19
    12:00 noon, Seminar Hall
    Foundations for Natural Proofs and Quantifier Instantiation(Abstract)
    Madhusudan Parthasarathy
    University of Illinois at Urbana-Champaign.

  • 11-01-19
    3.30 pm, Lecture Hall 6
    Hecke operators and the coherent cohomology of Shimura varieties(Abstract)
    Najmuddin Fakhruddin
    TIFR.

  • 11-01-19
    10:45 am, Seminar Hall
    The Lovász Vector of a Graph, with Applications to Isomorphism Testing(Abstract)
    Gaurav Rattan
    RWTH Aachen, Germany.

  • 09-01-19
    3.30 pm, Lecture Hall 6
    Soldering freedom and BMS like transformations(Abstract)
    Srijit Bhattacharjee
    IIIT Allahabad.

  • 09-01-19
    3.30 pm, Seminar Hall
    The minimal model program and the work of Caucher Birkar(Abstract)
    Najmuddin Fakhruddin
    TIFR.

  • 09-01-19
    12:00 noon, Seminar Hall
    Code Variants and Their Retrieval(Abstract)
    Venkatesh Vinayakarao
    IIIT Sri City.

  • 04-01-19
    10:30--11:45, Seminar Hall
    The Parameterized Complexity of Network Design Problems(Abstract)
    Pranabendu Misra
    University of Bergen.

  • 03-01-19
    3:30 pm, Seminar Hall
    Gromov-Witten Theory and Virtual Fundamental Classes(Abstract)
    Mohan Swaminathan
    Princeton University.