Joseph Hoisington

Mathematics Department
University of Pennsylvania

Office: DRL 4C11
Email : jhois at

Research and Academic Background

I am a fifth-year PhD student in the Mathematics Department at the University of Pennsylvania. My research is in differential and complex geometry and geometric analysis, and my advisor is Christopher Croke. The central results in my dissertation are an upper bound for the sum of the Betti numbers of a complex projective manifold in terms of its total curvature, and a characterization of the manifolds whose total curvature is minimal.


India's Janani Suraksha Yojana, a conditional cash transfer programme to increase births in health facilities: an impact evaluation
Lim SS, Dandona L, Hoisington JA, James SL, Hogan MC, Gakidou E. The Lancet 2010 Jun 4; 375:2009–2023.


Making Matrices Better: Geometry and Topology of Polar and Singular Value Decomposition
Deturck D , Elsaify A , Gluck H, Grossman B, Hoisington JA, Krishnan AM, Zhang J
To appear in Notices of the American Mathematical Society


During the Spring 2018 Semester, I am the grader for Math 601: Algebraic Topology with Prof. Gluck, and Math 350: Number Theory with Prof. Karemaker. My office hours are Tuesdays from noon to 1pm, and will also be at another time during the week, to be determined based on students' availability.

During the Fall 2017 Semester, I was the TA and grader for Math 600: Geometric Analysis and Topology with Prof. Ziller.

During the 2016-2017 academic year I did not teach, but I was a graduate fellow with the Center for Teaching and Learning. You can find information about upcoming CTL events here.

In previous semesters at Penn, I have been a TA for the following classes:

Math 240 Calculus III, with Prof. Panova, Spring 2016
Math 202 Proving Things: Analysis, with Prof. Grassi, Fall 2015
Math 241 Calculus IV, with Prof. Kazdan, Spring 2015
Math 240 Calculus III, with Prof. Shaneson, Fall 2014

In the 2015 summer term, I taught a section of Math 170, Ideas in Mathematics, an introduction to math and mathematical reasoning for students from the humanities and social sciences.