About me

I am a post-doctoral lecturer in the Department of Mathematics at the University of Pennsylvania. I received my Ph.D. in May 2010 from Duke University under the direction of Hubert Bray. Prior to that, I received my bachelor's degree from Harvey Mudd College.

teaching

  • Spring 2012: Math 104: Calculus I
  • Spring 2012: Math 313/513: Computational Linear Algebra
  • Fall 2011: Math 660: Differential Geometry
  • Spring 2011: Math 180: Analytical Methods in Economics, Law, and Medicine
  • Spring 2011: Math 312: Linear Algebra
  • Fall 2010: Math 500: Topology
  • research

    Broadly speaking, my research is in the fields of differential geometry and general relativity. Einstein's theory of general relativity asserts that space and time should be understood through their geometry, particularly their curvature. In Riemannian geometry, scalar curvature is interesting to study because it is arguably the simplest local Riemannian invariant. In general relativity, scalar curvature is intimately connected with energy density. Inspired by such physical considerations, a number of results in geometric analysis, such as the positive mass theorem and Riemannian Penrose inequality, have global implications for manifolds of nonnegative scalar curvature.

    The over-arching goal of my research is to better understand the geometry of manifolds of nonnegative scalar curvature, including manifolds that may have singularities. I am also interested in quasi-local mass/energy and static metrics.

    papers

  • Penrose-type inequalities with a Euclidean background
  • Fill-ins of nonnegative scalar curvature, static metrics, and quasi-local mass
  • Invariants of the harmonic conformal class of an asymptotically flat manifold
  • (thesis) Mass estimates, conformal techniques, and singularities in general relativity
  • (with H. Bray) A geometric theory of zero area singularities in general relativity
  • invited talks

            Please click on titles below for the abstracts, where available.
  • Syracuse U, 4/19/12. Mass and scalar curvature in general relativity, (Analysis seminar).
  • U Miami, 4/11/12. An axiomatic approach to quasi-local mass in general relativity, (Geometry and physics seminar).
  • CUNY Graduate Center, 11/1/11. Quasi-local mass, static vacuum metrics, and fill-ins of nonnegative scalar curvature, (Differential Geometry Seminar).
  • Knoxville, TN, 5/14/11. Quasi-local mass, static vacuum metrics, and fill-ins of nonnegative scalar curvature, (UTK Barrett Lectures on Mathematical Relativity).
  • Worcester, MA, 4/10/11. Nonnegative scalar curvature on compact manifolds with boundary, (AMS Eastern meeting).
  • Lafayette C., 3/26/11. Nonnegative scalar curvature on compact manifolds with boundary, (Lafayette-Lehigh Geometry-Topology Seminar).
  • SUNY Stony Brook, 3/18/11. Nonnegative scalar curvature on compact manifolds with boundary, (GR seminar joint with Columbia).
  • Haverford C., 2/14/11. Mathematical relativity and nonnegative scalar curvature, (Colloquium joint with Bryn Mawr).
  • Temple U., 9/29/10. Penrose-type inequalities for conformally flat manifolds, (Global analysis seminar).
  • Newark, NJ, 5/23/10. The harmonic conformal class and the Penrose inequality, (AMS Eastern meeting).
  • Johns Hopkins U., 3/15/10. An extension of the Riemannian Penrose inequality, (Workshop on mean curvature flows and related...).
  • San Francisco, CA, 1/13/10. Optimization problems within a harmonic conformal class, (Joint Math Meetings).
  • UNC Chapel Hill, 12/2/09. Mass estimates in general relativity, (Analysis/PDE seminar).
  • Boca Raton, FL, 10/30/09. A generalization of the Riemannian Penrose inequality, (AMS Southeastern meeting).
  • Snowbird, UT, 6/18/09. The Penrose inequality and inverse mean curvature flow, (Mathematical research communities).
  • other links

  • Barrett Lectures in Mathematical Relativity (UT Knoxville, May 11-14)
  • 2012 Geometry Festival at Duke (videos available)
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