December, 2011

  • Frozen Gaussian approximation for high frequency wave propagation

    Seminar/Colloquium/Special Talk
    Talk Series: 
    Special Talk
    Speaker: 
    Xu Yang (Courant Institute)
    Place : 
    511 Lake Hall, Northeastern University
    Date: 
    Thursday, December 1, 2011 - 4:30pm - 5:30pm

     

  • Moduli Space of Marked Cubic Surfaces

    Seminar/Colloquium/Special Talk
    Speaker: 
    Laurent Gruson (University of Versailles)
    Place : 
    511 Lake Hall, Northeastern University
    Date: 
    Friday, December 2, 2011 - 10:00am - 11:00am

     

    (Notice unusual time)
     
    Abstract: I will first explain what marked cubic surfaces are and the action of the Weyl group of the root system E6 on their moduli space. Then I will describle an equivariant rational map from this moduli space to the projectivised complexified root lattice.
     
  • Finite-Dimensional Representations of osp(2n+1,2n) in Small Rank

    Seminar/Colloquium/Special Talk
    Speaker: 
    Caroline Gruson (University of Nancy)
    Place : 
    511 Lake Hall, Northeastern University
    Date: 
    Friday, December 2, 2011 - 11:00am - 12:00pm
    (Notice unusual time)
     
    Abstract: I will explain algorithms computing the character of a simple module and composition series of indecomposable projective modules.
  • Delta-modules and syzygies of Segre embeddings

    Seminar/Colloquium/Special Talk
    Talk Series: 
    Special Talk
    Speaker: 
    Andrew Snowden (MIT)
    Place : 
    544 Nightingale Hall, Northeastern University
    Date: 
    Friday, December 2, 2011 - 3:00pm - 4:00pm

     

  • Equivariant Analogues of the Ham Sandwich Theorem

    Seminar/Colloquium/Special Talk
    Speaker: 
    Steve Simon, Courant Institute and Cooper Union
    Place : 
    511 Lake Hall
    Date: 
    Monday, December 5, 2011 - 12:15pm - 1:15pm

    The Ham Sandwich Theorem states that under generic conditions any n finite Borel measures on R^n can be bisected by a single hyperplane. Viewing this theorem as a Z_2-symmetry statement for measures, we generalize the theorem to other finite groups, notably the finite subgroups of the spheres S^1 and S^3, in each case realizing group symmetries on Euclidian space as group symmetries of its Borel measures by studying the topology of associated spherical space forms. Direct equipartition statements for measures are given as special cases. We shall also discuss the contributions of the tangent bundles of these manifolds in answering similar questions.