Events for 03/05/2018 from all calendars
Geometry Seminar
Time: 3:00PM - 4:00PM
Location: BLOC 628
Speaker: Frank Sottile, Texas A&M University
Title: Intersection Theory in Numerical Algebraic Geometry
Abstract: I will describe how some ideas from intersection theory are useful in numerical algebraic geometry. The fundamental data structure in numerical algebraic geometry is that of a witness set, which is considered to be an instantiation of Weil’s notion of a generic point. Reinterpreting a witness set in terms of duality of the intersection pairing in intersection theory leads to a generalization of the notion that makes sense on many spaces and leads to a general notion of a witness set. I will also describe how rational equivalence is linked to homotopy methods.
These notions are most productive for homogenous spaces, such as projective spaces, Grassmannians, and their products. After explaining the general theory, I will sketch what this means for the Grassmannian. This is joint work with Bates, Hauenstein, and Leykin.
Working Seminar in Groups, Dynamics, and Operator Algebras
Time: 3:00PM - 3:50PM
Location: BLOC 506A
Speaker: Jintao Deng, Texas A&M University
Title: Groupoid III
Student/Postdoc Working Geometry Seminar
Time: 5:00PM - 6:00PM
Location: BLOC 628
Speaker: JM Landsberg, TAMU
Title: Asymptotic spectra III