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Current Colloquia & Seminars

  1. Bowen Lecture Series -1- Symmetries of polynomial equations.

    Location: UC Berkeley - Banatao Auditorium, Sutardja Dai Hall
    Speakers: James McKernan (University of California, San Diego)

    The symmetries of systems of polynomial equations can be be understood in terms of the geometry of the variety of zeroes (or solution set) of the polynomials. Roughly speaking, there are 3 kinds of geometries corresponding to positive, zero and negative curvature giving rise to 3 different kinds of symmetry groups. In this lecture, I will discuss recent advances in algebraic geometry that lead to very precise results on the structure of these symmetry groups.

    Updated on Feb 11, 2019 10:18 AM PST
  2. BGMS Seminar: The integral Hodge conjecture for curve classes

    Location: MSRI: Simons Auditorium
    Speakers: John Ottem (University of Oslo)

    The integral Hodge conjecture predicts which integral cohomology classes on a smooth complex projective variety can be represented by linear combinations of complex subvarieties. This statement is known to be false in general, as shown first by Atiyah and Hirzebruch. I'll give a short introduction to this conjecture, and present some new counterexamples. This is joint work with Olivier Benoist.

    Created on Feb 14, 2019 02:33 PM PST