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I'm a faculty member at the Math Department of Ben-Gurion University.
During the academic year 2024-2025 I was a visiting professor at the Katok Center in Penn State University.
I was a postdoc at Northwestern University, a Ph.D. student of Omri Sarig at the Weizmann Institute, and an M.Sc. student of Hillel Furstenberg at the Hebrew University.
Contact information:
Contact information:
Office: 207, Building 58.
E-mail: hartmany at bgu, then ac and il
Research interests:
Research interests:
Random walks on groups and Poisson boundary, Geometric Group Theory, Ergodic Theory, and Operator Algebras.
Papers
Papers
On the Inclusion of Bounded Harmonic Functions of Random Walks [arxiv]
with Aranka Hrušková, and Omer Segev
preprintRetraction Theorems for Group Compactifications [arxiv]
with Aranka Hrušková, Mehrdad Kalantar and Tomer Zimhoni
preprintOn the amenable subalgebras of the group von Neumann algebras [journal| arxiv]
with Tattwamasi Amrutam and Hanna Oppelmayer
Journal of Functional Analysis, Volume-288, Issue-2, 2025Subalgebras, subgroups, and singularity [journal | arxiv]
with Tattwamasi Amrutam
Bulletin of the London Mathematical Society, https://doi.org/10.1112/blms.12939Tight inclusions of C*-dynamical systems [journal | arxiv]
with Mehrdad Kalantar
Groups, Geometry, and Dynamics (2023), doi10.4171/GGD/739Random Walks on Dense Subgroups of Locally Compact Groups [journal | arxiv]
with Michael Björklund and Hanna Oppelmayer
Trans. Amer. Math. Soc. (2023)Kudo-Continuity Of Entropy Functionals [arxiv]
with Michael Björklund and Hanna Oppelmayer
Ann. Inst. H. Poincaré Probab. Statist. 59(3): 1677-1687 (August 2023). DOI: 10.1214/22-AIHP1313The Stabilized Automorphism Group of a Subshift [journal | arxiv]
with Bryna Kra and Scott Schmieding
International Mathematics Research Notices, 2021, rnab204.Stationary C*-dynamical systems [journal |arxiv]
with Mehrdad Kalantar
with an appendix with Uri Bader and Mehrdad Kalantar
J. Eur. Math. Soc. 25 (2023), no. 5, pp. 1783–1821Choquet-Deny groups and the infinite conjugacy class property [journal | arxiv]
with Josh Frisch, Omer Tamuz and Pooya Vahidi Ferdowsi
Annals of Mathematics Vol. 190, No. 1 (July 2019), pp. 307-320Thompson's group F is not strongly amenable [journal | arxiv]
with Kate Juscheno, Omer Tamuz and Pooya Vahidi Ferdowsi
Ergodic Theory and Dynamical System Journal, 39 (2019) , pp. 925-929Furstenberg Entropy of Intersectional Invariant Random Subgroups [journal | arxiv]
with Ariel Yadin
Compositio Mathematica 154 (10), 2239-2265Generic stationary measures and actions [journal | arxiv]
with Lewis Bowen and Omer Tamuz
Trans. Amer. Math. Soc. 369 (2017) 4889-4929Stabilizer rigidity in irreducible group actions [journal | arxiv]
with Omer Tamuz
Israel Journal of Mathematics, October 2016, Volume 216, Issue 2, pp 679-705Property (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): 31-39Furstenberg entropy realizations for virtually free groups and lamplighter groups [journal|arxiv]
with Omer Tamuz
Journal d'Analyse Mathématique, April 2015, Volume 126, Issue 1, pp 227-257An Abramov formula for stationary spaces [journal | arxiv]
with Yuri Lima and Omer Tamuz
Ergodic Theory and Dynamical Systems, 34 (2014), pp 837-853Large semigroups of cellular automata [journal | arxiv]
Ergodic Theory and Dynamical Systems, 32 (2012), pp 1991-2010
From the web
From the web
A talk in the GGD seminar at University of Illinois at Urbana-Champaign.
A popular article in Popular Mechanics.
הרצאת מבוא על תחום המחקר שלי: רגע, לאן נעלמו כל הפונקציות ההרמוניות?
Teaching
Teaching
Stationary Dynamics: link to the course's website. The course was based on the preliminary version of my lecture notes. Use with caution: there might be mistakes there and you're welcome to let me know about them!
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