[[],[{"title":"Excellence Day 2026 ","web":"https://www.math.bgu.ac.il/research/events/excellence-day-2026","description":"- 13:00-14:00 Lunch buffet on site\r\n- 14:05 Greetings by Prof. Gaby Lemcoff, Dean of Natural Sciences.\r\n- 14:10 Opening remarks: Michael Lin, Daniel Sternheimer,\r\n- 14:20 Award of Excellence certificates to Ph.D. students Guy Shtotland and Liran Ron by Prof. Orna Braun-Lewensohn, Dean of Kreitman school of advanced studies\r\nand Dean Lemcoff .\r\n- 14:30 Honorary lecture: *Prof. Benjy Weiss*, (Hebrew University) **The isomorphism problem in ergodic theory**\r\n- 15:40 Prof. Yair Hartman will present the prizes for the 2026 Mathematics video competition  to Itamar Har Even (first place) and Shahar Khudadadi (second place).\r\n- 15:45 Presentation by Itamar Har Even of the winning video. \r\n- 15:50 Prof. Tom Meyerovitch, Introducing the recipient of the Noriko Sakurai prize for  excellent Post-Doc. Prize presented by Prof. Sternheimer.\r\n- 15:55 Lecture by the 2026 Noriko Sakurai prize recipient Dr. Aidan Young \r\n     \r\n     *Title*: **Covering radii and games on graphs** \r\n     \r\n     *Abstract*: The covering radius of a shift space is a quantity arising from the study of error-correcting codes in information theory. We will describe how these quantities can be computed by game-theoretic methods, translating the quantity into the payout of a two-player zero-sum game on graphs. Based on joint work with Tom Meyerovitch\r\n- 16:20 Prof. Gili Golan, introducing Mr. Eitan Sapir, the recipient of the Zabey- Harzfeld Prize for excellent Master thesis. Prize presented by Prof. Lin. \r\n- 16:25 Professor Inna Entova- Eizenbod will present recognition certificates by the department to the BGU team to the 2025 International Math. Competition for students. *Gilad Ofek* (won third prize), *Yarden Gur Arieh*, *Roei Sharifie* and *Iftah Nave* (received a commendation). \r\n- 16:30 Prof. Inna Entova- Eizenbod and Mrs. Adaya Cohen will present the Mia Cohen prize for high-school student in the department to *Yasmin Ifrah*","location":"-101","centre":true,"slug":"excellence-day-2026","expires":"2028-06-24","online":"https://us02web.zoom.us/j/88396327411?pwd=RwsWNO1mLA7FWPDUkXvQdaX8hZpMjO.1","descfiles_signed_ids":"[\"eyJfcmFpbHMiOnsiZGF0YSI6MTM1MSwicHVyIjoiYmxvYl9pZCJ9fQ==--630a9c5c8ac2b821270e439d975015f1f60c17b1\"]","duration":"[2026-06-30 10:00:00 UTC,2026-06-30 14:00:00 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theory and dynamical systems,  in particular symbolic dynamics and related aspects of probability theory. ","phd_year":"2009","phd_from":"Tel Aviv University","student_ids":[303],"postdoc_ids":[279,322,351],"first_i18n":{"en":"Tom","he":"תם"},"last_i18n":{"en":"Meyerovitch","he":"מאירוביץ"},"research_group_ids":[8],"id":50,"created_at":"2015-02-12T08:40:22.000+02:00","updated_at":"2026-09-22T18:10:03.113+03:00","admin_users":[],"orcid":"0000-0003-1617-0955","scopus":"24468336400"}],"duration_text":{"en":"Jun 30, 13:00—17:00, 2026","he":"יוני 30, 13:00—17:00, 2026"}}],[{"title":"המדרשה המתמטית בנגב","web":"https://innaentova.wixsite.com/midrasha","description":"הנכם מוזמנים להשתתף במדרשה המתמטית הרביעית בנגב. זוהי הזדמנות להכיר חוקרים פעילים במתמטיקה, לשמוע הרצאות על תחום מחקרם באווירה ידידותית, לשוחח עימם ולשאול שאלות על מחקר מתמטי.\r\n\r\n​המדרשה תכלול ארבע סדרות של הרצאות על ידי חברי סגל מהמחלקה למתמטיקה באוניברסיטת בן-גוריון בנגב, וכן טיול באזור שדה בוקר (בהתאם לתנאי מזג 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                                      \r\n\r\n##### מארכימדס ועד ל-CHAT GPT. איחוד נוסחאות לפאי.\r\n\r\nהקבוע המתמטי פאי (π) ריתק מתמטיקאים לאורך הדורות. נוסחאות לקירובים רציונליים לפאי הופיעו במקומות וזמנים שונים ובמגוון הקשרים מדעיים. מארכימדס ועד מדהווה, ליבניץ, גאוס, אוילר, רמנוג'אן ועד לנוסחאות מודרניות שמגיעות מתורת המיתרים, כל נוסחת קירוב היא עדות לתופעה מתמטית מעניינת. השפע הזה של נוסחאות מעורר שאלות מסקרנות: האם הן מקושרות זו לזו? כיצד הן שונות? מה משותף להן, ואיזו נוסחה מציעה את הקירוב \"הטוב ביותר\"?\r\n\r\nבשנת 2021, צוות מדענים מהטכניון יצר מגוון רחב של נוסחאות חדשות לפאי, מה שהוביל  לגילוי מבנה מתמטי חדש: שדה משמר מטריציאלי (Conservative Matrix Field - CMF).  בהרצאה זו נציג את ה-CMF ונראה כיצד נוסחאות הקירוב המפורסמות לפאי של לייבניץ,  לורד ברונקר, וואליס, גאוס, אוילר, רמנוג'אן ואחרים ניתנות לפירוש כ\"כיוונים\" שונים בתוך שדה משמר ייחודי.\r\n\r\nלקינוח, ניצור  פאי משלנו—הביאו סכו\"ם ומחשב נייד!\r\n\r\nההרצאה מבוססת על המאמר [From Euler to AI: Unifying Formulas for Mathematical Constants](https://arxiv.org/pdf/2502.17533) המתאר את תהליך ה\"קצירה\" (harvesting) וה\"עימור\" (Clustering)","location":"-101","centre":false,"slug":"piday25","expires":"2027-03-12","online":null,"descfiles_signed_ids":"[\"eyJfcmFpbHMiOnsiZGF0YSI6MTA1MCwicHVyIjoiYmxvYl9pZCJ9fQ==--2be82e91c8230f118d53f056846d12b209205240\"]","duration":"[2025-03-18 11:50:00 UTC,2025-03-18 13:50:00 UTC]","id":75,"created_at":"2025-03-12T12:16:48.238+02:00","updated_at":"2025-03-12T15:00:05.127+02:00","admin_users":[],"duration_text":{"en":"Mar 18, 13:50—15:50, 2025","he":"מרץ 18, 13:50—15:50, 2025"}},{"title":"המדרשה המתמטית בנגב","web":"https://innaentova.wixsite.com/midrasha","description":"הנכם מוזמנים להשתתף במדרשה המתמטית השלישית בנגב, אשר צפויה להתקיים בתאריכים 9-11 במרץ 2025 (ט'-י\"א באדר תשפ\"ה). זוהי הזדמנות להכיר חוקרים פעילים במתמטיקה, לשמוע הרצאות על תחום מחקרם באווירה ידידותית, לשוחח עימם ולשאול שאלות על מחקר מתמטי.\r\n\r\n​המדרשה תכלול ארבע סדרות של הרצאות על ידי חברי סגל מהמחלקה למתמטיקה באוניברסיטת בן-גוריון בנגב, וכן טיול באזור שדה בוקר (בהתאם לתנאי מזג האוויר).","location":"מדרשת בן-גוריון","centre":true,"slug":"midrasha25","expires":"2026-11-25","online":null,"descfiles_signed_ids":"[]","duration":"[2025-03-08 22:00:00 UTC,2025-03-10 22:00:00 UTC]","id":74,"created_at":"2024-11-25T15:24:31.303+02:00","updated_at":"2024-11-25T15:24:31.303+02:00","admin_users":[{"pure":"4bd29fc8-a415-46c4-a798-33145c0d008d","gs":null,"wos":"D-4557-2016","arxiv":null,"mathscinet":"927596","state":"_active","first":"Yaar 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The purpose of my talk is to present a new proof (which is part of current joint reflexions with E. Hrushovski and F. Loeser) of the following classical fact (Grauert, Kuhlmann, Temkin,...) : let $(k,\\|.\\|)$ be a stable valued field, and let $(r_1,\\dots,r_n)$ be elements of an ordered abelian group $G$ containing $\\|k^*\\|$. Let $\\|.\\|'$ be the $G$-valued valuation on $k(T_1,\\dots,T_n)$ that sends $\\sum a_I T^I$ to $\\max_I \\|a_I\\|\\cdot r^I$. Then $(k(T_1,\\dots,T_n),\\|.\\|')$ is stable too.\r\n\r\nOur general strategy is purely geometric, but the proof is based upon model-theoretic tools coming from model theory (which I will first present; no knowledge of model theory will be assumed). 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