Video Lectures

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Given a one-parameter degenerating family of rational maps on the projective line, it is possible to construct a non-archimedean limit which captures how this family degenerates.  Recently, Luo used ultrafilters to construct limits for an arbitrary...

I will discuss the path integral of pure 3D gravity on a finite region of spacetime, with boundary conditions that fix dihedral angles or geodesic lengths. This amplitude calculates corrections to the Gaussian statistics of OPE coefficients in the...

Consider a point mass traveling in a polygon. It travels in a straight line, with constant speed, until it hits a side, at which point it obeys the rules of elastic collision. What can we say about this? When all the angles of the polygon are...