I am currently a lecturer-researcher at the Department of Mathematics, FPT University, DaNang. Before this, I was a lecturer at the Department of Mathematics, University of DaNang. Before this, I was  Boya Postdoc at Beijing International Center for Mathematical Research-Peking University. I received my doctorate at the University of Wisconsin-Milwaukee in May 2019 under the guidance of Prof.Chris Hruska. Here is a copy of my CV.

My research interests are in geometric group theory and low-dimensional topology.  In particular, quasi-isometric classification, quasi-isometric rigidity, commensurability classification, and geometric relationship between a group and its subgroups (subgroup distortions, quasiconvexity,...), groups acting on a finite product of quasi-trees.

I am supported by Project ICRTM04_2021.07 of the International Centre for Research and Postgraduate Training in Mathematics, Vietnam and was partially supported by the National key program for the development of Mathematics under grant number B2024-CTT-04

Email: nthoang.math@gmail.com / hoangnt63@fe.edu.vn 

Distinction: 

Scientific Prize of the Institute of Mathematics, Vietnam Academy of Science and Technology, 2021.

Publications and preprints:

1. Sublinearly Morse boundary of CAT(0) admissible groups (with Yulan Qing). arXiv:2203.00935. To appear in Journal of Group Theory. [Pdf]

2.  Quasi-isometric rigidity of extended admissible groups (with Alex Margolis). arXiv:2401.03635 [Pdf] Submitted.

3. Largest hyperbolic action of 3-manifold groups (with Carolyn Abbott and Alex Ramussen). arXiv:2305.07425 . Submitted.

4. Finite height subgroups of extended admissible groups. [Pdf]

5. Embedding Croke-Kleiner admissible groups into finite product of trees (with Suzhen  Han and Wenyuan Yang). To appear in Algebraic & Geometric Topology, arXiv:2108.03361::2108.03361

6. Strongly quasiconvex subgroups in amalgams and HNN extension (with Hung Cong Tran). arXiv:2204.09242. International Journal of Algebra and Computation, Vol. 33, No. 03, pp. 435-444 (2023) 

7. Croke-Kleiner admissible groups: Property (QT) and quasiconvexity (with Wenyuan Yang). Michigan Mathematical Journal, 73 (2023), 971-1019  arXiv:2009.02863

8. Quasiconvexity in 3-manifold groups (with Hung Cong Tran and  Wenyuan Yang). Arxiv:1911.07807. Mathematische Annalen, 381, 405-437 (2021).

9. Subgroup distortion of 3-manifold groups. (with Hongbin Sun) Transactions of the American Mathematical Society., 373 (2020), no. 9, 6683-6711 .

10. Distortion of surfaces in 3-manifolds. Journal of Topology, (2019) 12(4): 1115-1145

11. On the relative hyperbolicity and manifold structure of certain right-angled Coxeter groups. ( with H.C.Tran, M. Haulmark.)  International Journal of Algebra and Computation, 30 (2020), no.3, 501-537.  

12. On the coarse geometry of certain right-angled Coxeter groups. (with H.C.Tran) Algebraic & Geometric Topology 19-6(2019) 3075-3118

13. Quasi-isometry of pairs: surfaces in graph manifolds.  International Journal of Algebra and Computation, Vol.29, No.04, pp 681-698 (2019)

14. Distortion of surfaces in graph manifolds. (with Chris Hruska.)  Algebraic  & Geometric Topology 19 (2019), no. 1, 363–395

Teaching Experience:

Fall 2023, Sping 2024: FPT University

• Math MAE101, Mathematics for Engineering

Summer 2022 : Duy Tan University

• Calculus II

2019-present: 

• Introduction to 3-manifolds (Fall 2019): Beijing Jiaotong University.

2014-2019: University of Wisconsin-Milwaukee

-  Survey in Calculus and Analytic Geometry (4 semesters include 2 semesters for discussion and 2 semesters for the online course)

 - Calculus and Analytic Geometry I (1 semester)

 - Calculus and Analytic Geometry II (1 semester)

 - Calculus and Analytic Geometry III (3 semesters)

 - Intermediate Algebra (1 semester)

 - College Algebra (1 semester)

Service:

• Reviewer for Mathematical Reviews 

• Referee for the following journals: Groups Geometry and Dynamics, Geometriate Dedicata