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X-WR-CALNAME:Institute of Mathematics and Informatics
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X-WR-CALDESC:Събития за Institute of Mathematics and Informatics
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DTSTART;TZID=Europe/Sofia:20230124T150000
DTEND;TZID=Europe/Sofia:20230124T163000
DTSTAMP:20260427T194503
CREATED:20230120T214839Z
LAST-MODIFIED:20230120T214839Z
UID:13707-1674572400-1674577800@math.bas.bg
SUMMARY:Съвместен семинар на МЦМН и секция МОИ
DESCRIPTION:Във вторник от 15:00 часа в зала 403 ще състои съвместна сбирка на семинарите на\nМЦМН и секция МОИ.\nДоклад на тема:\nЛинейни и циклични кодове над пръстени\nще изнесе д-р Мариам Бажалан\, която започва постдокторантура в ИМИ-БАН по програма ПИКОМ.\n\n\nAbstract: The study of codes over the rings (ring-linear codes) attracted great interest after the work of Calderbank\, Hammons\, Kumar\, Sloane\, and Sole in the early 1990s. In this seminar\, the basic theory of linear codes over finite commutative rings will be presented including the importance of codes over rings\, various kinds of rings for ring-linear coding theory\, the weight functions on finite rings\, MacWilliams equivalence theorem and the connection between these codes and codes over fields via the Gray maps. Moreover\, the cyclic codes over finite commutative rings will be considered. Finally\, some well-known generalizations of cyclic codes such as negacyclic\, quasi-cyclic\, polycyclic\, multivariable\, polynomial and Abelian codes will be introduced.
URL:https://math.bas.bg/event/%d1%81%d1%8a%d0%b2%d0%bc%d0%b5%d1%81%d1%82%d0%b5%d0%bd-%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-%d0%b8-%d1%81%d0%b5%d0%ba%d1%86%d0%b8%d1%8f-%d0%bc%d0%be%d0%b8/
LOCATION:Международна конференция Quantum Groups and Cluster Algebras
CATEGORIES:Работен семинар
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20230131T150000
DTEND;TZID=Europe/Sofia:20230131T163000
DTSTAMP:20260427T194503
CREATED:20230127T140512Z
LAST-MODIFIED:20230127T140512Z
UID:13720-1675177200-1675182600@math.bas.bg
SUMMARY:Съвместен семинар на МЦМН и секция МОИ
DESCRIPTION:Във вторник\, 31.01.2023 г.\, от 15:00 часа в зала 403 ще състои съвместна сбирка на семинарите на\nМЦМН и секция МОИ.\nДоклад на тема:\nВърху оптимално пакетиране на кълба на Минковски и приложения\nще изнесе проф. Николай Глазунов (ИМИ-БАН\, Институт по Кибернетика\, Киев).\n\n\nAbstract: We investigate lattice packings of Minkowski balls and domains. By results of the proof of Minkowski conjecture about the critical determinant we divide the balls and domains on 3 classes: Minkowski\, Davis and Chebyshev-Cohn. The optimal lattice packings of the balls and domains are obtained. The minimum areas of hexagons inscribed in the balls and domains and circumscribed around them are given. These results lead to algebro-geometric structures in the framework of Pontrjagin duality theory.
URL:https://math.bas.bg/event/%d1%81%d1%8a%d0%b2%d0%bc%d0%b5%d1%81%d1%82%d0%b5%d0%bd-%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-%d0%b8-%d1%81%d0%b5%d0%ba%d1%86%d0%b8%d1%8f-%d0%bc%d0%be%d0%b8-2/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Работен семинар
END:VEVENT
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