I'm a faculty member at the Math Department of Ben-Gurion University.

Before that, 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: Office: 207, Building 58. E-mail: hartmany at bgu, then ac and il

Research interests:
Random walks on groups and Poisson boundary, Geometric Group Theory, Ergodic Theory, Invariant Random Subgroups, Symbolic Dynamics, Cellular Autoamta.

Papers

• Tight inclusions of C*-dynamical systems [arxiv]
  with Mehrdad Kalantar
• Random Walks on Dense Subgroups of Locally Compact Groups [arxiv]
  with Michael Björklund and Hanna Oppelmayer
  
• Kudo-Continuity Of Entropy Functionals [arxiv]
  with Michael Björklund and Hanna Oppelmayer
  
• The Stabilized Automorphism Group of a Subshift [journal | arxiv]
  with Bryna Kra and Scott Schmieding
  International Mathematics Research Notices, 2021, rnab204.
• Stationary C*-dynamical systems [arxiv]
  with Mehrdad Kalantar
  with an appendix with Uri Bader and Mehrdad Kalantar
  To appear in J. Eur. Math. Soc. (JEMS)
• Choquet-Deny groups and the infinite conjugacy class property [journal | arxiv]
  with Joshua Frisch, Omer Tamuz and Pooya Vahidi Ferdowsi
  Annals of Mathematics Vol. 190, No. 1 (July 2019), pp. 307-320
• Thompson'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. 925-929
• Furstenberg Entropy of Intersectional Invariant Random Subgroups [journal | arxiv]
  with Ariel Yadin
  Compositio Mathematica 154 (10), 2239-2265
• Generic stationary measures and actions [journal | arxiv]
  with Lewis Bowen and Omer Tamuz
  Trans. Amer. Math. Soc. 369 (2017) 4889-4929
• Stabilizer rigidity in irreducible group actions [journal | arxiv]
  with Omer Tamuz
  Israel Journal of Mathematics, October 2016, Volume 216, Issue 2, pp 679-705
• 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): 31-39
• Furstenberg 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 227-257
• An Abramov formula for stationary spaces [journal | arxiv]
  with Yuri Lima and Omer Tamuz
  Ergodic Theory and Dynamical Systems, 34 (2014), pp 837-853
• Large semigroups of cellular automata [journal | arxiv]
  Ergodic Theory and Dynamical Systems, 32 (2012), pp 1991-2010

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?