Previous Learning Seminars
Spring 2025 | Discrete Groups, Expanding Graphs, and Measure Invariants
In the spring of 2025, the Midrasha learning seminar focused on Discrete Groups, Expanding Graphs, and Measure Invariants.
Students who are interested in giving talks are welcome to contact the organizers.
Main Reference
[Lub] Alexander Lubotzky, Discrete Groups, Expanding Graphs and Invariant Measures. With an appendix by Jonathan D. Rogawski. Progress in Mathematics, 125. Birkhäuser Verlag, Basel, 1994.
Topics and Speakers
The topics and speakers of each week are here.
Fall 2024–25 | Measured Group Theory
In the fall of 2024–25, our Midrasha reading seminar aimed to learn some topics in Measured Group Theory.
Main References
[Fur] Furman, A surevy of measured group. Geometry, rigidity, and group actions, 296–374, 2011.
[Kerr-Li] Ergodic Theory: Independence and Dichotomies. Springer Monographs in Mathematics. Springer, Cham, 2016.
Secondary References
[Ioa] Ioana, Orbit equivalence of ergodic group actions (lecture notes).
[Loh] Löh, Ergodic Theory of Groups (lecture notes), 2020.
Topics and Speakers
The topics and speakers of each week are here.
Spring 2024 | On Expanders, Ramanujan Graphs, Property Testing, Stability, and Group Approximation
In the spring of 2024, the Midrasha learning seminar focused on various topics ranging from expanders and Ramanujan graphs to property testing, locally testable codes, stability, group approximation, and soficity. Above all, he will focus on the connection between them. The primary speaker was Alex Lubotzky.
Topics and Speakers
The topics and speakers of each week are here.
Fall 2023–24 | The Spectrum of Hyperbolic Surfaces
In the fall of 2023–24, our Midrasha reading seminar aimed to learn some topics on the spectrum of hyperbolic surfaces.
Main References
[Ber] Bergeron, The spectrum of hyperbolic surfaces. Translated from the 2011 French original by Brumley. Universitext. Springer, 2016.
Topics and Speakers
The topics and speakers of each week are here.
Spring 2023 | Hyperbolic Geometry
In the spring of 2023, our Midrasha reading seminar aimed to learn some topics in hyperbolic geometry.
Main References
[BP] Benedetti and Petronio. Lectures on hyperbolic geometry. Universitext. Springer-Verlag, Berlin, 1992
Topics and Speakers
The topics and speakers of each week are here.
Special Meeting on October 2, 2023
On October 2, we had a special event with a special talk by Uri Bader on optional topics for next semester's morning session. We chose our winning topic for next semester: the spectrum of hyperbolic surfaces.
Fall 2022–23 | Harmonic Analysis
In the fall of 2022–23, our Midrasha reading seminar aimed to learn some topics in harmonic analysis.
Main References
[Fol] Folland. A course in abstract harmonic analysis. Second edition. Textbooks in Mathematics. CRC Press, Boca Raton, FL, 2016
Topics and Speakers
The topics and speakers of each week are here.
Special Meeting on February 27, 2023
On February 27, we had a special event with the last talks in harmonic analysis, followed by a special talk by Uri Bader on potential topics for next semester's morning session. We chose our winning topic for next semester: hyperbolic geometry.
Previous Research Seminars
Spring 2025
| March 24, 2025 | Rotem Yaari (TAU) |
| March 31, 2025 | Tsachik Gelander |
| April 7, 2025 | Cancelled |
| April 21, 2025 | Yair Glasner (BGU) |
| April 28, 2025 | Yuval Gorfine (Weizmann) |
| May 5, 2025 | Corentin Le Bars (Weizmann) |
| May 12, 2025 | Michael Glasner (Weizmann) |
| May 19, 2025 | Tomer Zimhoni (BGU) |
| May 26, 2025 | Yaar Solomon (BGU) |
| June 9, 2025 | No Midrasha (Walkshop) |
| June 16, 2025 | Aranka Hrušková (Weizmann) |
| June 23, 2025 | Alon Dogon (Weizmann) |
| June 30, 2025 | 11:15 Saar Bader (Technion) 14:15 Elyasheev Leibtag (Technion) |
Fall 2024–25
| November 4, 2024 | Petr Naryshkin (Alfréd Rényi Inst. of Mathematics) |
| November 11, 2024 | Andreas Thom (Dresden) |
| November 18, 2024 | Michael Chapman (NYU) |
| November 25, 2024 | Shachar Carmeli (Weizmann) |
| December 2, 2024 | Bennie Bachner (Weizmann) |
| December 9, 2024 | Zvi Shem-Tov (IAS) |
| December 16, 2024 | Gil Goffer (UCSD) |
| December 23, 2024 | Shaked Bader (Oxford) |
| December 30, 2024 | No Midrasha (Dynamics & NT Workshop at HUJI) On that note, on Dec 25, there will be Action Now at HIT. |
| January 6, 2025 | No Midrasha (Winter School at Weizmann) On Jan 5–8, Winter School on Group expansion, combinatorics & complexity. |
| January 13, 2025 | Guy Blachar (Weizmann) |
| January 20, 2025 | Arie Levit (TAU) |
| January 27, 2025 | Ariel Yadin (BGU) |
Spring 2024
| April 8, 2024 | Barak Weiss (TAU) |
| April 15, 2024 | Arielle Leitner (Afeka) |
| April 22, 2024 | Passover |
| April 29, 2024 | Passover |
| May 6, 2024 | Elon Lindenstrauss (HUJI) |
| May 13, 2024 | Yom HaZikaron |
| May 20, 2024 | Omri Solan (HUJI) |
| May 26–28, 2024 | Walkshop |
| June 3, 2024 | Zachary Munro (Technion) |
| June 10, 2024 | Alon Dogon (Weizmann) |
| June 17, 2024 | Gal Yehuda (Yale) |
| June 24, 2024 | Yuval Grofine (Weizman) |
| July 1, 2024 | Dan Rockmore (Dartmouth College) |
| July 8, 2024 | Gil Goffer (UCSD) |
Fall 2023–24
| December 11, 2023 | Nir Lazarovich (Technion) |
| December 18, 2023 | Alex Furman (U of Illinois at Chicago) |
| December 25, 2023 |
Action Now! 11:00–11:50 Doron Puder (TAU) |
| January 1, 2024 | Corentin Le Bars (Weizmann) |
| January 8, 2024 | Chen Meiri (Technion) |
| January 15, 2024 | Shmuel Weinberger (U of Chicago) |
| January 22, 2024 | Alex Lubotzky (Weizmann) |
| January 29, 2024 | Mark Shusterman (Weizmann) |
| February 5, 2024 | Devora Zalaznik (HUJI) |
| February 12, 2024 | Aranka Hrušková (BGU) |
| February 19, 2024 | Orr Shalit (Technion) |
| February 26, 2024 | Yuval Yifrach (Technion) |
Spring 2023
| April 17, 2023 | 11:15 Igor Spiridonov (Weizmann & National Research University Higher School of Economics) 14:15 Uri Bader (Weizmann) |
| April 23 – 24, 2023 | Faculty Trip |
| April 30 – May 2, 2023 | Walkshop |
| May 8, 2023 | Andrei Alpeev (Weizmann) |
| May 15,2023 | Biao Ma (Technion) |
| May 22, 2023 | 11:15 Leonardo Lerer (Weizmann) 14:15 Tom Meyerovich (BGU) |
| May 29, 2023 | Itamar Vigdorovich (Weizmann) |
| June 5, 2023 | Bharat Rangarjan (HUJI) |
| June 12, 2023 | Special Midrasha Meeting 10:00–11:00 Amir Behar (HUJI) 11:15–13:00 Michael Glasner - LS (Weizmann) 13:00–14:00 Lunch 14:00–15:00 Bharat Rangarjan (HUJI) 15:15–16:15 Arghya Mondal (Krea) 16:30–17:30 Michael Farber (Queen Mary) |
| June 19, 2023 | Elyasheev Leibtag (Weizmann) |
| June 26, 2023 | Benjamin Bachner (Weizmann) |
| July 3, 2023 | Yair Hartman (BGU) |
| July 10, 2023 | Noam Kolodner (TAU) |
| July 17, 2023 | Izhar Oppenheim (BGU) |
Fall 2022–23
| November 7, 2022 | No Midrasha (Action Now!) |
| November 14, 2022 | Alon Dogon (Weizmann) |
| November 21, 2022 | Or Landesberg (Yale) |
| November 28, 2022 | No Midrasha |
| December 5, 2022 | Ilan Hirshberg (BGU) |
| December 12, 2022 | Josh Frisch (École Normale Supérieure) |
| December 19, 2022 | Carlos De La Cruz Mengual (Weizmann) |
| December 26, 2022 | Tobias Hartnick (Karlsruher Institut für Technologie) |
| January 2, 2023 | 11:15 Nikolay Bogachev (Weizmann & Institute for Information Transmission Problems) 14:15 Daniel Wise (McGill) |
| January 9, 2023 | Arie Levit (TAU) |
| January 16, 2023 | Orr Shalit (Technion) |
| January 23, 2023 | Ido Grayevsky (BGU) |
| January 30, 2023 | 11:15 Michael Glasner (Weizmann) 14:15 Alex Furman (University of Illinois at Chicago) |
| February 6, 2023 | No Midrasha |