Technion - Israel Institute of Technology Department of Mathematics ===================================== PDE AND APPLIED MATHEMATICS SEMINAR ===================================== Two Talks Please note also the unusual time and place First Talk DATE: Tuesday, December 20, 2011 Time: 13:30 Place: Amado 919 SPEAKER: Tomio Umeda, University of Hyogo TITLE: Non-existence of threshold resonances of magnetic Dirac operators ABSTRACT: I would like to talk about threshold energies of magnetic Dirac operators on R^3. After giving a brief review of the study of threshold eigenfunctions, I state our recent results on the non-existence of threshold resonances and illustrate the outline of the proof. (This talk is based on a joint work with Yoshimi Saito.) ============================== Second Talk Time: 14:30 Place: Amado 919 SPEAKER: Yoshinori Kametaka, Osaka University TITLE: The best constant of discrete Sobolev inequality on C60 Fullerene ABSTRACT: The best constant of discrete Sobolev inequality on a finite graph with good symmetry is obtained. Regular polyhedra, truncated regular polyhedra are treated. The most important is the truncated icosahedron, C60 Fullerene. Triangular, square and hexagonal lattices on a torus of small size are also treated. Among these Carbon Nanotubes on a torus are also very interesting. For further info: Yehuda Pinchover <pincho@techunix.technion.ac.il> For past and future Applied Math/PDE seminars see: <http://www.math.technion.ac.il/pde/seminar.html> --------------------------------------------------------- Technion Math. Net (TECHMATH) Editor: Michael Cwikel <techm@math.technion.ac.il> Announcement from: Yehuda Pinchover <pincho@tx.technion.ac.il>