Matthew Haulmark

Visiting Assistant Professor

Research Focus

Topology and geometric group theory

My primary area of research is in geometric group theory. In particular, I am interested in boundaries of relatively hyperbolic and CAT(0) groups, JSJ-splittings of groups, right-angled Coxeter groups, and the topology at infinity of finitely presented groups.


  • Haulmark M., Hruska G. C., On canonical splittings of relatively hyperbolic groups, To appear, Israel Journal of Mathematics (31 pages)

  • Haulmark M., Schreve K., Minimal volume entropy of RAAG’s, Bulletin of the LMS 55 (2023), no. 2, 879-885 (6 pages)

  • Dani P., Haulmark M., Walsh G., Right-angled Coxeter groups with non-planar boundary, Groups, Geometry, and Dynamics 17 (2023) 127-155 (28 pages)

  • Haulmark M., Mihalik M., On relatively hyperbolic groups with semistable peripherals, International Journal of Algebra and Computation 32 (2022) no. 4, 753-783

  • Haulmark M., Mihalik M., Piecewise visual, linearly connected metrics on boundaries of relatively hyperbolic groups, J. of Topology and Analysis Vol 0 (2021) no. 0, 1-47

  • Haulmark M., Nguyen H., Tran H.C., On the relative hyperbolicity and manifold structure of certain right-angled Coxeter groups, International Journal of Algebra and Computation 30 (2020) no.3 501-53

  • Haulmark M., Hruska G. C., Sayathe B., Non-hyperbolic groups with Menger curve boundary, L’Enseignement Mathématique (2) 65 (2019) 207-220

  • Haulmark M., Local cut points and splittings of relatively hyperbolic groups, Algebraic & Geometric Topology, 19-6 (2019), 2795–2836

  • Haulmark M., Boundary classification and 2-ended splittings of groups with isolated flats, Journal of Topology, 11(3):645-665 (2018)

MATH Courses - Fall 2023

MATH Courses - Spring 2024