Tamas Kalman

Kálmán Tamás


Home page

(magyar nyelven itt)                                                    日本語版
photograph by Seiichi Majima


Contact information

Email address:
my family name at math dot titech dot ac dot jp
Postal Address:
mail code H-214
Department of Mathematics
Tokyo Institute of Technology
2-12-1 Ookayama, Meguro-ku
Tokyo 152-8551


Current activity

In the Spring and Fall semesters of 2014, I am teaching a lecture course in first-year linear algebra. Please visit the class website for further information.

In Spring 2014, I am also teaching a graduate course on knots and Floer homology (officially called Algebraic Topology). There is a website for that class as well.


Professional Information

I am a researcher and instructor of mathematics. I live with my wife Makiko and our two daughters.

I am fortunate to have spent time at the following great institutions:

For more detailed information, please see my CV.



My main research interests are in low-dimensional geometric topology, in particular in contact 3-manifolds and Legendrian knots (and their Floer homologies), as well as in classical knot invariants such as the Homfly polynomial. Recently I started doing work on graphs and hypergraphs, too. Through combinatorics, I found interesting new connections between knot polynomials and Floer homology.

trinity with special alternating link
visualizing the interior polynomial



  1. Part of my undergraduate thesis (Stable maps of surfaces into the plane) was published at Topology and its Applications.
  2. With my undergraduate advisor András Szűcs, we co-authored another paper (On double points of immersed surfaces) in the same journal.
  3. My doctoral dissertation (Contact homology and one parameter families of Legendrian knots) was published at Geometry and Topology.
  4. A follow-up paper (Braid-positive Legendrian links) appeared in the International Mathematics Research Notices.
  5. This manuscript (Maximal Thurston-Bennequin number of +adequate links) was published in the Proceedings of the American Mathematical Society.
  6. This article (Rulings of Legendrian knots as spanning surfaces) appeared in the Pacific Journal of Mathematics.
  7. This paper (Isotopies of Legendrian 1-knots and Legendrian 2-tori), joint with Tobias Ekholm, was published in the Journal of Symplectic Geometry.
  8. The manuscript Meridian twisting of closed braids and the Homfly polynomial appeared in the Mathematical Proceedings of the Cambridge Philosophical Society. Here are the slides of a talk I gave on the subject.
  9. The paper Inner products on the Hecke algebra of the braid group was published in Topology and its Applications.
  10. My first paper on combinatorics, A version of Tutte's polynomial for hypergraphs, appeared in Advances in Mathematics. I gave several versions of this talk on the results in it.
  11. Our joint paper with András Juhász and Jake Rasmussen, Sutured Floer homology and hypergraphs, was published at Mathematical Research Letters. It is summarized in these slides.
  12. With Tobias Ekholm and Ko Honda, we wrote a paper on Legendrian knots and exact Lagrangian cobordisms that is due to appear in the Journal of the European Mathematical Society. I discussed its contents in this talk.