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X-ORIGINAL-URL:https://math.bas.bg
X-WR-CALDESC:Събития за Institute of Mathematics and Informatics
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TZID:Europe/Sofia
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DTSTART:20250330T010000
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BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20250314T130000
DTEND;TZID=Europe/Sofia:20250314T143000
DTSTAMP:20260622T082408
CREATED:20250309T104623Z
LAST-MODIFIED:20250309T104623Z
UID:17437-1741957200-1741962600@math.bas.bg
SUMMARY:Семинар "Алгебра и логика"
DESCRIPTION:На 14 март 2025 г. (петък) от 13:00 часа в зала 578 на ИМИ\nи онлайн чрез Zoom ще се проведе хибридно заседание на семинара по „Алгебра и логика”. \nДоклад на тема: \nProtection Against Noise for a Type of Quantum Computation\nще изнесе \nВалентин Илиев (ИМИ-БАН). \nАбстракт. In this presentation we establish necessary and sufficient conditions for some pairs of quantum logic gates which operate on one qubit to be protected against crosstalk. More precisely\, it is devoted to the protection against noise for measurement-based quantum computation. We use the notions of (in)dependence of two events in an appropriate classical probability space and the related informational (in)dependence. \n  \nЛинк към zoom-стаята на семинара:\n\nHttps://us02web.zoom.us/j/85137375021?pwd=RE5QczdFTE1xL1R6MnI2b1lkcGczQT09\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%b0-117/
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
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20250318T140000
DTEND;TZID=Europe/Sofia:20250318T153000
DTSTAMP:20260622T082408
CREATED:20250311T201727Z
LAST-MODIFIED:20250317T175529Z
UID:17483-1742306400-1742311800@math.bas.bg
SUMMARY:Семинар на секция "Изследване на операциите\, вероятности и статистика"
DESCRIPTION:На 18-ти март (вторник) от 14:00 ч. в зала 503 на ИМИ\nще се състои сбирка на Семинара на секция ИОВС.  Доклад на тема: \nЧислено обратно моделиране за идентифициране на волатилността от опционни котировки\nще изнесе гл. ас. Слави Георгиев Георгиев\, ИМИ-БАН. \nРезюме. Волатилитетът е един от най-важните параметри\, като едновременно с това не е пряко наблюдаем на пазара. В този доклад представяме някои подходи за идентифициране на изменчивостта като функция на времето\, когато се знае някаква информация за опционната премия. Използваме усредняваща линеаризация по времето на дифузионните членове на начално-граничните задачи. След това разлагаме приближеното решение по отношение на волатилността\, за да пристъпим към новия времеви слой в дискретната задача. Тези подходи са тествани с реални и симулирани данни за европейски и други типове опции.
URL:https://math.bas.bg/event/%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%bd%d0%b0-%d1%81%d0%b5%d0%ba%d1%86%d0%b8%d1%8f-%d0%b8%d0%b7%d1%81%d0%bb%d0%b5%d0%b4%d0%b2%d0%b0%d0%bd%d0%b5-%d0%bd%d0%b0-%d0%be%d0%bf%d0%b5%d1%80%d0%b0-6/
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%98%D0%B7%D1%81%D0%BB%D0%B5%D0%B4%D0%B2%D0%B0%D0%BD%D0%B5%20%D0%BD%D0%B0%20%D0%BE%D0%BF%D0%B5%D1%80%D0%B0%D1%86%D0%B8%D0%B8%D1%82%D0%B5%2C%20%D0%B2%D0%B5%D1%80%D0%BE%D1%8F%D1%82%D0%BD%D0%BE%D1%81%D1%82%D0%B8%20%D0%B8%20%D1%81%D1%82%D0%B0%D1%82%D0%B8%D1%81%D1%82%D0%B8%D0%BA%D0%B0":MAILTO:jeni@math.bas.bg;
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20250325T140000
DTEND;TZID=Europe/Sofia:20250325T153000
DTSTAMP:20260622T082408
CREATED:20250319T152833Z
LAST-MODIFIED:20250319T152833Z
UID:17502-1742911200-1742916600@math.bas.bg
SUMMARY:Семинар на МЦМН
DESCRIPTION:Дата: 25.03.2025 г.\, 14:00 ч. \nМясто: Зала 403\, ИМИ – БАН \nДокладчик: Михаил Школников\, ИМИ – БАН \nДоклад: Affine distance function \nДопълнителна информация: https://icms.bg/category/icms-seminar/ \nРезюме. Affine geometry is sometimes described as “what remains of Euclidean geometry when distances are forgotten”. In this talk\, I will report on a very recent discovery of an affine-invariant notion\, which may be viewed as a distance from a point inside a convex domain to its boundary. This new concept stems from a suggestion of Conan Leung\, who proposed to average the canonical tropical series\, a fundamental notion of tropical optics\, over the manifold of all tropical structures of fixed covolume on the given affine space. Very little of what we (Nikita Kalinin\, Ernesto Lupercio and me) currently know\, as well as necessary preliminaries\, some observations and precise conjectures\, will be covered during the talk\, which mainly serves as an invitation to participate in developing this exciting new topic.
URL:https://math.bas.bg/event/%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%bd%d0%b0-%d0%bc%d1%86%d0%bc%d0%bd-28/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Редовен семинар
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20250327T140000
DTEND;TZID=Europe/Sofia:20250327T153000
DTSTAMP:20260622T082408
CREATED:20250325T195400Z
LAST-MODIFIED:20250325T195400Z
UID:17514-1743084000-1743089400@math.bas.bg
SUMMARY:Семинар по Приложна математика
DESCRIPTION:About m-ary Gray codes\nДокладчик: д-р Мария Пашинска\, ИМИ – БАН\nДата: 27.03.2025 г.\nЧас: 14:00 ч.\nМясто: зала 503 \nРезюме: We present several systemized implementations of the Gray code over an alphabet with m ≥ 2 elements. Gray codes are widely used in digital communications and effective generation of combinatorial objects. We consider two variants – reflected and modular m-ary Gray codes. We present algorithms for their generation and other important functions such as ranking and unranking and functions for generation of a maximal set of non-proportional vectors of length n over the given alphabet. Some applications of the m-ary Gray codes are also considered. \nThis talk is based on joined work with Stefka Bouyuklieva \, Iliya Bouyukliev and Valentin Bakoev. \n 
URL:https://math.bas.bg/event/%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%bf%d0%be-%d0%bf%d1%80%d0%b8%d0%bb%d0%be%d0%b6%d0%bd%d0%b0-%d0%bc%d0%b0%d1%82%d0%b5%d0%bc%d0%b0%d1%82%d0%b8%d0%ba%d0%b0-13/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Редовен семинар
ORGANIZER;CN="%D0%98%D0%BD%D1%81%D1%82%D0%B8%D1%82%D1%83%D1%82%20%D0%BF%D0%BE%20%D0%BC%D0%B0%D1%82%D0%B5%D0%BC%D0%B0%D1%82%D0%B8%D0%BA%D0%B0%20%D0%B8%20%D0%B8%D0%BD%D1%84%D0%BE%D1%80%D0%BC%D0%B0%D1%82%D0%B8%D0%BA%D0%B0%20-%20%D0%91%D0%90%D0%9D":MAILTO:office@math.bas.bg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20250327T160000
DTEND;TZID=Europe/Sofia:20250327T173000
DTSTAMP:20260622T082408
CREATED:20250325T192815Z
LAST-MODIFIED:20250326T082005Z
UID:17506-1743091200-1743096600@math.bas.bg
SUMMARY:Семинар на МЦМН
DESCRIPTION:Дата: 27.03.2025 г.\, 16:00 ч. \nМясто: Зала 403\, ИМИ – БАН \nДокладчик: Luis Ugarte\, University of Zaragoza\, Spain \nДоклад: Complex structures on Lie algebras and its application to the Hull-Strominger system \nДопълнителна информация: https://icms.bg/category/icms-seminar/ \nРезюме. In this talk we will explain the role that the Lie algebras play in the construction of 6-dimensional compact quotient spaces M=G/Γ\, where Γ is a lattice\, endowed with an invariant complex structure with holomorphically trivial canonical bundle.We will use the approach of stable forms in six dimensions to provide a classification of unimodular Lie algebras admitting a complex structure with non-zero closed (3\,0)-form. Some of these spaces can be equipped with balanced Hermitian metrics and they provide invariant solutions of the Hull-Strominger system\, even with non-flat connection on the tangent bundle satisfying the Hermitian-Yang-Mills condition.
URL:https://math.bas.bg/event/%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%bd%d0%b0-%d0%bc%d1%86%d0%bc%d0%bd-29/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Редовен семинар
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20250328T130000
DTEND;TZID=Europe/Sofia:20250328T143000
DTSTAMP:20260622T082408
CREATED:20250325T194351Z
LAST-MODIFIED:20250325T194351Z
UID:17510-1743166800-1743172200@math.bas.bg
SUMMARY:Семинар "Алгебра и логика"
DESCRIPTION:На 28 март 2025 г. (петък) от 13:00 часа в зала 578 на ИМИ\nи онлайн чрез Zoom ще се проведе хибридно заседание на семинара по „Алгебра и логика”. \nДоклад на тема: \nGraded algebras that are the sum of two homogeneous subalgebras\nще изнесе \nПламен Кошлуков (State University of Campinas\, Brazil). \nАбстракт. Let A be an algebra over a field F\, graded by a group G\, and let B and C be two homogeneous subalgebras of A such that A=B+C. We study the following problem: If B and C satisfy graded identities\, does the same also hold for A? \nThe analogous problem for algebras without any grading was proposed in 1994 by Beidar and Mikhalev; in implicit form it appeared in a paper by O. Kegel\, in 1963. Several particular cases were considered in a series of papers by various authors. In 2016\, Kępczyk gave an affirmative answer to this problem (without grading). \nWe show that if B and C satisfy graded identities\, and also B is a (one-sided) ideal of A then A=B+C also satisfies graded identities. We also study the situation where A satisfies specific graded semi-identities. In this case\, if C satisfies some graded identity in neutral variables\, we show that A satisfies graded identities. We also find upper bounds for the degrees of such identities. Here we use methods that go back to the classical Regev theorem on the growth of the codimensions of an associative algebra. \nFinally we exhibit an example that shows that the graded version of the Kępczyk theorem is no longer valid.\nThis is a joint work with P. S. Fagundes.\n  \nЛинк към zoom-стаята на семинара:\n\nHttps://us02web.zoom.us/j/85137375021?pwd=RE5QczdFTE1xL1R6MnI2b1lkcGczQT09\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%b0-118/
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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