Suraj Krishna M S

I am a postdoc in the Mathematics Department of the Technion.  My area of research is geometric group theory.  Previously, I was at the Tata Institute of Fundamental Research.

I graduated in September 2018 with a PhD from the  Université Paris-Sud. My advisors were Frédéric Haglund and Thomas Delzant.

Geometric group theory is the study of (infinite) groups via their actions on geometric objects. This approach brings out various connections between algebra and geometry/topology.

A class of groups of interest are "nonpositively curved groups",  particularly fundamental groups of nonpositively curved cube complexes.  A cube complex is an object built by gluing a collection of Euclidean cubes of various dimensions along their faces. 


My arXiv page.

6. Hyperbolic hyperbolic-by-cyclic groups are cubulable, with François Dahmani and Jean Pierre Mutanguha, accepted to Geometry & Topology (2023). 

5. Cubulating a free-product-by-cyclic group, with François Dahmani, accepted to Algebraic & Geometric Topology (2022).

4. Relatively hyperbolic groups with strongly shortcut parabolics are strongly shortcut, with Nima Hoda, Math. Proceedings of the Cambridge Phil. Society 175 (2023), no. 2, 367–380. 

3. Relative hyperbolicity of hyperbolic-by-cyclic groups, with François Dahmani, Groups, Geometry, and Dynamics 17 (2023), no. 2, 403–426. 

2. Immersed cycles and the JSJ decomposition, Algebraic & Geometric Topology 20 (2020), no. 4, 1877–1938. 

1. Vertex links and the Grushko decomposition, Annales de la Faculté des Sciences de Toulouse 6-32 (2023) no. 3, 555–576

0. Constructing Grushko and JSJ decompositions: a combinatorial approach, PhD thesis, 2018.

Contact details: 

E-mail - surajms at

Faculty of Mathematics

Technion - Israel Institute of Technology

Haifa 3200003 Israel