Email: bahtoh ~at~ gatech.edu
Office: Skiles 221
Welcome!
I am an Assistant Professor in the School of Mathematics at the Georgia Institute of Technology.
You can find my CV here (last update: July 18, 2021). Here's my Math Genealogy entry.
I am currently coorganizing (together with Zhiyu Wang and Xingxing Yu) the Georgia Tech Graph Theory Seminar. Please shoot any of us an email if you'd like to give a talk! I am also maintaining a list of online lectures and talks in mathematical logic and related areas.
Research
My main areas of research are combinatorics and descriptive set theory. Some particular topics I am interested in include: graph coloring, probabilistic methods, extremal combinatorics, and Borel/measurable combinatorics with applications to ergodic theory.
Papers and Preprints
 With J. Anderson and A. Dhawan. Coloring graphs with forbidden bipartite subgraphs. Preprint (submitted).
 Equivariant maps to subshifts whose points have small stabilizers. Preprint (submitted).
 Borel fractional colorings of Schreier graphs. Preprint (submitted).
 With E. Lee. Searching for an intruder on graphs and their subdivisions. Preprint (submitted).
 Probabilistic constructions in continuous combinatorics and a bridge to distributed algorithms. Preprint (submitted).
 A fast distributed algorithm for (Δ+1)edgecoloring. Preprint (submitted).
 Distributed algorithms, the Lovász Local Lemma, and descriptive combinatorics. Preprint (submitted).
 With C.T. Conley. Equitable colorings of Borel graphs. Preprint (submitted).
 Local coloring problems on smooth graphs. Fundamenta Mathematicae (to appear).
 With M. Delcourt and A. Tserunyan. Independent sets in algebraic hypergraphs. Journal of the European Mathematical Society (to appear).
 On Baire measurable colorings of group actions. Ergodic Theory and Dynamical systems (2021).
 A short proof of Bernoulli disjointness via the Local Lemma. Proceedings of the American Mathematical Society (2020).
 Ergodic theorems for the shift action and pointwise versions of the Abért–Weiss theorem. Israel Journal of Mathematics (2020).
 With O. Khormali, R.R. Martin, J. Rollin, D. Rorabaugh, S. Shan, and A.J. Uzzell. Regular colorings in regular graphs. Discussiones Mathematicae Graph Theory (2020).
 With A. Kostochka and X. Zhu. Fractional DPcolorings of sparse graphs. Journal of Graph Theory (2020).
 Multiplication of weak equivalence classes may be discontinuous. Transactions of the American Mathematical Society (2019).
 Building large free subshifts using the Local Lemma. Groups, Geometry, and Dynamics (2019).
 With A. Kostochka. DPcolorings of hypergraphs. European Journal of Combinatorics (2019).
 With M. Tait. Improved lower bound for difference bases. Journal of Number Theory (2019).
 Measurable versions of the Lovász Local Lemma and measurable graph colorings. Advances in Mathematics (2019).
 The JohanssonMolloy Theorem for DPcoloring. Random Structures and Algorithms (2019).
 With M. Delcourt, H. Towsner, and A. Tserunyan. A short nonalgorithmic proof of the containers theorem for hypergraphs. Proceedings of the American Mathematical Society (2019).
 With A. Kostochka. On differences between DPcoloring and list coloring (in Russian). Matematicheskie Trudy (2018); English version.
 With A. Kostochka. Sharp Dirac's theorem for DPcritical graphs. Journal of Graph Theory (2018).
 With A. Kostochka and X. Zhu. DPcolorings of graphs with high chromatic number. European Journal of Combinatorics (2017).
 The Local Cut Lemma. European Journal of Combinatorics (2017).
 With A. Kostochka and S. Pron. On DPcoloring of graphs and multigraphs (in Russian). Siberian Mathematical Journal (2017); English version.
 The asymptotic behavior of the correspondence chromatic number. Discrete Mathematics (2016).
 New bounds for the acyclic chromatic index. Discrete Mathematics (2016).
 With A. Kostochka. On the number of edges in a graph with no (k+1)connected subgraphs. Discrete Mathematics (2016).
 3Regular subgraphs and (3,1)colorings of 4regular pseudographs (in Russian). Discrete Analysis and Operations Research (2014).
 With N. Shilov. Robots in Space Multiagent Problem: complexity, information and cryptographic aspects (in Russian). Modeling and Analysis of Information Systems (2013).
Other Writing
Reading groups and seminars
I am currently coorganizing (together with Zhiyu Wang and Xingxing Yu) the Georgia Tech Graph Theory Seminar. Please shoot any of us an email if you'd like to give a talk! I am also maintaining a list of online lectures and talks in mathematical logic and related areas. Here are some other resources for online talks:
Mentoring
Current Ph.D. Students
Teaching
Current Teaching
Undergraduate Research (MATH2699BER and MATH4699BER).
Highlights of Past Teaching
At Georgia Tech:
 2021, Spring Combinatorial Analysis (MATH 4032).
 2020, Fall Introduction to Graph Theory (MATH 4022).
At CMU:
 2019, Fall Combinatorics (21301) and Algebraic Structures (21373).
 2019, Summer Research Topics in Combinatorics (21499).
 2019, Spring Set Theory (21329).
 2018, Fall Linear Algebra (21341).
At UIUC:
 2017, Fall A Mathematical World (MATH 181), Primary Instructor.
 2015, Spring Applied Linear Algebra (MATH 415), TA.
 2014, Fall Applied Linear Algebra (MATH 415), TA.
School of Mathematics
Georgia Institute of Technology
College of Science
