Hangjun Xu, Graduate Student

Please note: Hangjun has left the Mathematics department at Duke University; some info here might not be up to date.

Contact Info: 

Office Location:	037 Physics
Email Address:
Starting Year:	2009
Mentor(s):	Richard Hain
Advisor(s):	Hubert Bray

Typical Courses Taught:

• MATH 111L, LABORATORY CALCULUS I

• MATH 122L, INTRO CALCULUS II WITH APPLICA

• MATH 32L, LABORATORY CALCULUS II

• MATH 25L, LAB CALC/FUNCTIONS I

• MATH 107, LINEAR ALGEBRA & DIFF EQUATION

• MATH 25L, LAB CALC/FUNCTIONS I

• Math 31L.01L, Laboratory Calculus I/Lab Assistant

  The Instructor is Professor Lewis D Blake

Education:

Ph.D. in Mathematics	Duke University (advisor: Hubert Bray)	2014
M.S. in Computer Science	Duke University (advisor: Pankaj K. Agarwal)	2014
B.S. Honors in Pure and Applied Mathematics	Zhejiang University (advisor: Weimin Sheng)	2009

Specialties:

Geometry

Research Interests: Differential Geometry and Geometric Analysis

Areas of Interest:

-Geometric PDE, Analysis on Manifolds
-Interplay Between Geometry, Topology and Analysis
-Geometric and Data Mining Algorithms

Curriculum Vitae

Recent Publications

1. H. Xu, Uniformly Area Expanding Flows in Spacetimes (theis, Duke University) (April, 2014) [Xu_duke_0066D_12371.pdf]

Selected Outreach Activities

1. Academic Outreach Visit, February, 2007, University of Washington, Seattle    

Selected Talks

1. Inverse Mean Curvature Vector Flows in Spacetimes, April 25, 2014, Duke University Graduate/Faculty Seminar [video.html]    
2. An Algorithm for Comparing Similarity Between Two Trees: Edit Distance with Gaps, April 7, 2014, D344 LSRC, Duke University [available here]     [M.S. Defense Presentation Scripts] [M.S. Defense Presentation Slides]
3. Inverse Mean Curvature Vector Flows in Spacetimes, April 1, 2014, Social Sciences 228, Duke University     [Ph.D. Defense Presentation]
4. Constant Mean Curvature Surface in Asymptotically Flat Manifolds, April 5, 2013, Duke University Graduate/Faculty Seminar [video.html]     [1. Talk Notes] [2. Foliation in Schwarzschild Manifold by Stable CMC Spheres, PDF] [3.Variation of Surfaces along Normal Direction, PDF]
5. Applications of Jacobi Field Estimates on Topology and Curvature, November 20, 2011, Duke University Morse Theory Seminar     [Talk Notes]
6. Path Space and Variation of Energy, October 23, 2011, Duke University Morse Theory Seminar     [Talk Notes]
7. The Automorphism Group of a Compact Hyperbolic Riemann Surface is Finite, April 19, 2011, Duke University Algebraic Topology Seminar     [Talk Notes]
8. Harmonic Map and its Applications, June 22, 2010, Zhejiang University Differential Geometry Seminar [news.asp]