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X-WR-CALDESC:Събития за Institute of Mathematics and Informatics
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DTSTART;TZID=Europe/Sofia:20260424T130000
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DTSTAMP:20260418T174408
CREATED:20260417T152450Z
LAST-MODIFIED:20260417T152558Z
UID:19128-1777035600-1777041000@math.bas.bg
SUMMARY:Семинар "Алгебра и логика"
DESCRIPTION:На 24 април 2026 г. (петък) от 13:00 часа\nв зала 578 на ИМИ-БАН и онлайн чрез платформата zoom\nще се проведе дистанционно заседание на семинара по „Алгебра и логика”. \nДоклад на тема: \nSets preserved by a large subgroup of the special linear group\nще изнесе \nКалоян Славов (Медицински университет\, София).\nРезюме. The classical Kakeya problem in Euclidean space asks how “small” a set can be if it contains a unit line segment in every direction. More generally\, packing sets contain all images of a given set under a collection of transformations. Finite field analogues offer a combinatorial and algebraic perspective and motivate our work. \nWe study sets \(E\) in the affine plane over a finite field that are invariant under a large subgroup \(R\) of \(SL_2\). We prove that if \(|R|>c|E|^{3/2}\)\, then \(E\) must be contained in a line. The exponent \(3/2\) is sharp. We conclude with a remark on a related phenomenon in the Euclidean setting. This is joint work with Thang Pham and Le Quang-Hung. \n\nЛинк към zoom-стаята на семинара:\nhttps://us02web.zoom.us/j/88300991142?pwd=wGYl7VaD9RZKEm99sKzHMzl3bYCv3J.1\n\nПоканват се всички желаещи да присъстват. \nОт секция „Алгебра и логика” на ИМИ – БАН\nhttp://www.math.bas.bg/algebra/seminarAiL/\n============================== =====================
URL:https://math.bas.bg/event/%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%b0%d0%bb%d0%b3%d0%b5%d0%b1%d1%80%d0%b0-%d0%b8-%d0%bb%d0%be%d0%b3%d0%b8%d0%ba%d0%b0-126/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Редовен семинар
ORGANIZER;CN="%D0%A1%D0%B5%D0%BA%D1%86%D0%B8%D1%8F%20%D0%90%D0%BB%D0%B3%D0%B5%D0%B1%D1%80%D0%B0%20%D0%B8%20%D0%BB%D0%BE%D0%B3%D0%B8%D0%BA%D0%B0":MAILTO:algebra_logic_seminar@math.bas.bg
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