


I'm a Boas Assistant Professor (postdoc) at the department of mathematics, Northwestern University.
I completed my
PhD at the Weizmann Institute under the
supervision of Omri Sarig.
My M.Sc. is from the Hebrew University and
my adviser was Hillel Furstenberg.
Contact information:
Office: Lunt 312.
Email: hartman at math.northwestern.edu
 
Research interests: Random walks on groups and Poisson boundary, Geometric Group Theory, Ergodic Theory, Invariant Random Subgroups, Symbolic Dynamics, Cellular Autoamta.


Papers
 ChoquetDeny groups and the infinite conjugacy class property [arxiv]
with Joshua Frisch, Omer Tamuz and Pooya Vahidi Ferdowsi

Stationary C*dynamical systems [arxiv]
with Mehrdad Kalantar
with an appendix with Uri Bader and Mehrdad Kalantar

Furstenberg Entropy of Intersectional Invariant Random Subgroups [arxiv]
with Ariel Yadin

Thompson's group F is not strongly amenable
[arxiv]
with Kate Juscheno, Omer Tamuz and Pooya Vahidi Ferdowsi
to appear in Ergodic Theory and Dynamical System Journal

Generic stationary measures and actions
[arxiv]
with Lewis Bowen and Omer Tamuz
Trans. Amer. Math. Soc. 369 (2017) 48894929

Stabilizer rigidity in irreducible group actions [journal  arxiv]
with Omer Tamuz
Israel Journal of Mathematics, October 2016, Volume 216, Issue 2, pp 679705

Property (T) and the Furstenberg Entropy of Nonsingular Actions
[journal  arxiv]
with Lewis Bowen and Omer Tamuz
Proceedings of the American Mathematical Society, 144, no. 1 (2016): 3139

Furstenberg entropy realizations for virtually free groups and lamplighter groups [journalarxiv]
with Omer Tamuz
Journal d'Analyse Mathématique, April 2015, Volume 126, Issue 1, pp 227257

An Abramov formula for stationary spaces [journal  arxiv]
with Yuri Lima and Omer Tamuz
Ergodic Theory and Dynamical Systems, 34 (2014), pp 837853
 Large semigroups of cellular automata [journal  arxiv]
Ergodic Theory and Dynamical Systems, 32 (2012), pp 19912010
Activities
Teaching
Winter 2018: FurstenbergPoisson boundaries and Stationary Dynamical Systems. Here is a preliminary version of my lecture notes (19).
Fall 2017: Differential Calculus of Multivariable Functions (Math 230).
I worked as a TA at the Department of Mathematics, BenGurion University, teaching the courses
Algebra 1, Algebra 2 and Discrete math.





