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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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BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20210302T130000
DTEND;TZID=Europe/Sofia:20210302T143000
DTSTAMP:20260702T024704
CREATED:20210228T195213Z
LAST-MODIFIED:20210228T195213Z
UID:10215-1614690000-1614695400@math.bas.bg
SUMMARY:Семинар “Problems and Methods Related to Coding Theory“
DESCRIPTION:Семинарът  \nProblems and Methods Related to Coding Theory\nОрганизиран от \nИМИ – БАН\, Секция “Математически основи на информатиката”\, \n Novosibirsk State University\, Novosibirsk\, Russia\, и \n Sobolev Institute of Mathematics\, Siberian Branch of  the Russian Academy of Sciences\, Novosibirsk\, Russia \nВи кани на поредната си сбирка\, която ще се проведе онлайн на 02 март 2021 г. от 13:00 часа. \nПетър Бойваленков\, ИМИ-БАН\,\nще изнесе доклад на тема: \nUniversal Bounds for Cardinality and Energy of Codes of Given Minimum and Maximum Distances\nAbstract. We employ signed measures that are positive definite up to certain degrees to establish Levenshtein-type upper bounds on the cardinality of codes with given minimum and maximum distances\, and universal lower bounds on the potential energy (for absolutely monotone interactions) for codes with given maximum distance and cardinality. The distance distributions of codes that attain the bounds are found in terms of the parameters of Levenshtein-type quadrature formulas. Necessary and sufficient conditions for the optimality of our bounds are derived. Further\, we obtain upper bounds on the energy of codes of fixed minimum and maximum distances and cardinality. \nJoint work with Peter Dragnev\, Douglas Hardin\, Edward Saff\, Maya Stoyanova \nСтраница на семинара: http://www.math.bas.bg/moiuser/PMCT/ \nТеТ\nJoin Zoom Meeting \nZoom ID: 910 5863 2644 \nPassword: 12624120 \nhttps://zoom.us/j/91058632644?pwd=Q3FZa29SV0pTUTZ5bEl1WGwyQU8xUT09
URL:https://math.bas.bg/event/%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-problems-and-methods-related-to-coding-theory/
LOCATION:Zoom
CATEGORIES:Работен 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:20210305T160000
DTEND;TZID=Europe/Sofia:20210305T170000
DTSTAMP:20260702T024704
CREATED:20210227T110158Z
LAST-MODIFIED:20210227T110158Z
UID:10212-1614960000-1614963600@math.bas.bg
SUMMARY:Семинар "Алгебра и логика"
DESCRIPTION:На 5 март 2021 г. (петък) от 16:00 часа ще се проведе дистанционно заседание на семинара по „Алгебра и логика”. \nДоклад на тема \nFinite presentability for metabelian groups\, Lie algebras and restricted Lie algebras\nще изнесе Десислава Кошлукова (Университет в Кампинас\, Бразилия). \nРезюме. In the first part of the talk we revisе the already known classifications of finite presentability (in terms of generators and relations) for metabelian groups and metabelian Lie algebras. The case of groups was solved by Robert Bieri and Ralph Strebel in 1980s and that of Lie algebras was done by Roger Bryant and John Groves in late 1990s. In the last part of the talk we discuss new results about the classification of finitely presented metabelian restricted Lie algebras based on joint work with Adriana Leon\, J. Algebra\, 560 (2020)\, 1107-1145. \nСеминарът ще се проведе посредством платформата Zoom и всеки желаещ може да се присъедини като последва линка: \nhttps://us02web.zoom.us/j/85137375021?pwd=RE5QczdFTE1xL1R6MnI2b1lkcGczQT09 \nTopic: Онлайн семинар на секция “Алгебра и логика”\nTime: Feb 26\, 2021 01:00 PM Sofia\nMeeting ID: 851 3737 5021\nPasscode: 035647 \n  \n  \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%b0-42/
LOCATION:Zoom
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:20210309T171500
DTEND;TZID=Europe/Sofia:20210309T183000
DTSTAMP:20260702T024704
CREATED:20210308T093745Z
LAST-MODIFIED:20210308T094420Z
UID:10225-1615310100-1615314600@math.bas.bg
SUMMARY:Национален семинар по стохастика
DESCRIPTION:Националният семинар по стохастика  \nорганизира съвместна сбирка със \nсеминара по вероятности на Варшавския технически университет \nна 9 март 2021 г. (вторник) от 17:15 часа в платформата Zoom. \nДоклад на тема \nCharacterization properties of exponential distribution\nще изнесе Георги Янев (University of Texas Rio Grande Valley\, USA \nand Institute of Mathematics and Informatics\, Bulgarian Academy of Sciences). \nРЕЗЮМЕ \nLink to the Zoom meeting:\nhttps://zoom.us/j/427487575\nPasscode: HArN3sS
URL:https://math.bas.bg/event/%d0%bd%d0%b0%d1%86%d0%b8%d0%be%d0%bd%d0%b0%d0%bb%d0%b5%d0%bd-%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%bf%d0%be-%d1%81%d1%82%d0%be%d1%85%d0%b0%d1%81%d1%82%d0%b8%d0%ba%d0%b0-25/
LOCATION:Zoom
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20210311T160000
DTEND;TZID=Europe/Sofia:20210311T170000
DTSTAMP:20260702T024704
CREATED:20210308T095653Z
LAST-MODIFIED:20210308T095653Z
UID:10232-1615478400-1615482000@math.bas.bg
SUMMARY:Национален семинар по информатика
DESCRIPTION:На 11.03.2021 г. (четвъртък)\, 16:00 ч.\, ще се състои дистанционно заседание на Националния семинар по информатика\, на който \nдоц. д-р Велин Андонов – ИМИ-БАН \nще изнесе публична академична лекция на тема: \nНови модели на системи за обслужване.\nJoin Zoom Meeting\nhttps://us02web.zoom.us/j/81724360747?pwd=aXV0b0lFclBoQzl6VGZLR0k2dEZQQT09\nMeeting ID: 817 2436 0747\nPasscode: 008937 \n  \nИзпращайте вашите мнения\, както и предложения за доклади на Националния семинар по информатика на: \nПредседател: проф. Аврам Ескенази (eskenazi@math.bas.bg) \nСекретар: доц. Стоян Порязов (stoyan@math.bas.bg)
URL:https://math.bas.bg/event/%d0%bd%d0%b0%d1%86%d0%b8%d0%be%d0%bd%d0%b0%d0%bb%d0%b5%d0%bd-%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%bf%d0%be-%d0%b8%d0%bd%d1%84%d0%be%d1%80%d0%bc%d0%b0%d1%82%d0%b8%d0%ba%d0%b0/
LOCATION:Zoom
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:20210312T163000
DTEND;TZID=Europe/Sofia:20210312T180000
DTSTAMP:20260702T024704
CREATED:20210308T102223Z
LAST-MODIFIED:20210308T103205Z
UID:10235-1615566600-1615572000@math.bas.bg
SUMMARY:Съвместно заседание на семинара по „Алгебра и логика” и на общия семинар на секция „Анализ\, геометрия и топология”
DESCRIPTION:На 12 март 2021 г. (петък) от 16:30 часа ще се проведе съвместно дистанционно заседание на семинара по „Алгебра и логика” и на общия семинар на секция „Анализ\, геометрия и топология”. \nДоклад на тема \nAlgebraic Non-hyperbolicity of Hyperkähler Manifolds\nще изнесе Людмила Каменова (Stony Brook University\, USA). \nРезюме. A projective manifold is algebraically hyperbolic if the degree of any curve is bounded from above by its genus times a constant\, which is independent from the curve. This is a property which follows from Kobayashi hyperbolicity. We prove that hyperkahler manifolds are not algebraically hyperbolic when the Picard rank is at least 3\, or if the Picard rank is 2 and the SYZ conjecture on existence of Lagrangian fibrations is true. We also prove that if the automorphism group of a hyperkahler manifold is infinite\, then it is algebraically non-hyperbolic. These results are joint with Misha Verbitsky. \nСеминарът ще се проведе посредством платформата Zoom и всеки желаещ може да се присъедини като последва линка: \nhttps://us02web.zoom.us/j/85137375021?pwd=RE5QczdFTE1xL1R6MnI2b1lkcGczQT09 \nTime: Mar 12\, 2021 04:30 PM Sofia\nMeeting ID: 851 3737 5021\nPasscode: 035647 \nОт секция „Алгебра и логика” на ИМИ – БАН\nhttp://www.math.bas.bg/algebra/seminarAiL/
URL:https://math.bas.bg/event/%d1%81%d1%8a%d0%b2%d0%bc%d0%b5%d1%81%d1%82%d0%bd%d0%be-%d0%b7%d0%b0%d1%81%d0%b5%d0%b4%d0%b0%d0%bd%d0%b8%d0%b5-%d0%bd%d0%b0-%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80%d0%b0-%d0%bf%d0%be-%d0%b0/
LOCATION:Zoom
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:20210315T143000
DTEND;TZID=Europe/Sofia:20210315T160000
DTSTAMP:20260702T024704
CREATED:20210313T113230Z
LAST-MODIFIED:20210313T113910Z
UID:10269-1615818600-1615824000@math.bas.bg
SUMMARY:Семинар "Дидактическо моделиране"
DESCRIPTION:Поредната сбирка на семинара \nДидактическо моделиране\nще се проведе на 15.03.2021 г. от 14:30 ч. в зала 278. Доклад на тема \n Обобщения на понятията умножение и триъгълник и на една геометрична теорема на Максуел  \nще изнесе \nдоц. Бойко Банчев \nАдрес за дистанционно участие в семинара: https://meet.jit.si/didmod-15-3-2021
URL:https://math.bas.bg/event/%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%b4%d0%b8%d0%b4%d0%b0%d0%ba%d1%82%d0%b8%d1%87%d0%b5%d1%81%d0%ba%d0%be-%d0%bc%d0%be%d0%b4%d0%b5%d0%bb%d0%b8%d1%80%d0%b0%d0%bd%d0%b5-8/
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:20210318T140000
DTEND;TZID=Europe/Sofia:20210318T153000
DTSTAMP:20260702T024704
CREATED:20210313T095508Z
LAST-MODIFIED:20210313T095508Z
UID:10264-1616076000-1616081400@math.bas.bg
SUMMARY:Семинар на секция "Математическо моделиране и числен анализ"
DESCRIPTION:На 18 март 2021 г. (четвъртък) от 14:00 часа ще се проведе семинар на секция “Математическо моделиране и числен анализ” в системата Zoom. \nДоклад на тема \nАпроксимация на параметрични модели за растеж и еволюция на тумори по метода на редуцирания базис\nще изнесе доц. Петър Рашков. \nАбстракт: Ще направя кратко въведение в метода на редуцирания базис (МРБ) за намиране на приближени решения на параметрични ЧДУ\, дискретизирани по метода на крайните елементи. Ще бъдат представени два класически подхода за построението на базиса: правилно ортогонално разлагане (POD) и алчен алгоритъм. За да бъде използван пълноценно\, алчният алгоритъм трябва да бъде придружен от оценка на грешката на апроксимация на численото решение с решението по МРБ. Направен е теоретичен анализ върху апостериорната оценка на грешката за две параметрични параболични задачи\, които описват а) модел за растеж на мозъчен тумор (Murray 2003) и б) модел за фенотипна еволюция в структурирана клетъчна популация (Chisholm et al 2015; Magal & Webb 2000). Дискретната задача е интегрирана по времето с IMEX схема от първи ред. Получените теоретични резултати дават основата за числени експерименти за построение на редуциран базис за тези модели\, както е вече направено за някои други параболични задачи (Grepl & Patera 2005; Haasdonk\, Ohlberger & Rozza 2008). \nТова изследване е подкрепено от Фонд „Научни изследвания“ по Националната научна програма „Петър Берон и НИЕ“ на МОН с договор № КП-06-ДБ-5.\n—————————— \nIMI BAS is inviting you to a scheduled Zoom meeting. \nTopic: семинар на секция ММЧА\nTime: Mar 18\, 2021 14:00 Sofia \nJoin Zoom Meeting\nhttps://us02web.zoom.us/j/86427551368?pwd=bEtvamh2Rm8yakZCYXJzZXpwTWMwZz09А \nMeeting ID: 864 2755 1368\nPasscode: 347055
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%bc%d0%b0%d1%82%d0%b5%d0%bc%d0%b0%d1%82%d0%b8%d1%87%d0%b5%d1%81%d0%ba%d0%be-%d0%bc%d0%be%d0%b4%d0%b5-9/
LOCATION:Zoom
CATEGORIES:Редовен семинар
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20210319T160000
DTEND;TZID=Europe/Sofia:20210319T173000
DTSTAMP:20260702T024704
CREATED:20210315T103255Z
LAST-MODIFIED:20210315T103255Z
UID:10274-1616169600-1616175000@math.bas.bg
SUMMARY:Семинар "Алгебра и логика"
DESCRIPTION:На 19 март 2021 г. (петък) от 16:00 часа ще се проведе дистанционно заседание на семинара по „Алгебра и логика”. \nДоклад на тема \nSome applications of transfinite numbers to algebra and some applications of number theory to transfinite numbers\nще изнесе Andreas Weiermann (Ghent University\, Belgium). \nРезюме. In the first part we will survey the role of transfinite numbers in the study of Hilbert’s basis theorem and its extension by MacLagan. To this end we associate ordinals to some natural well partial orderings related Cartesian products of the set of natural numbers and we apply this apparatus to monomial ideals in F[X_1\,…\,X_n] where F is a field. \nIn the second part we use the machinery of Tauberian theorems to prove some structural results about transfinite numbers regarding limit laws and phase transitions. \nThe talk will be non technical and it is aimed at a general mathematical audience. \nСеминарът ще се проведе посредством платформата Zoom и всеки желаещ може да се присъедини като последва линка: \nhttps://us02web.zoom.us/j/85137375021?pwd=RE5QczdFTE1xL1R6MnI2b1lkcGczQT09 \nTopic: Онлайн семинар на секция “Алгебра и логика”\nTime: Mar 19\, 2021 04:00 PM Sofia\nMeeting ID: 851 3737 5021\nPasscode: 035647 \n  \n  \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%b0-43/
LOCATION:Zoom
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:20210326T130000
DTEND;TZID=Europe/Sofia:20210326T143000
DTSTAMP:20260702T024704
CREATED:20210321T105155Z
LAST-MODIFIED:20210321T110102Z
UID:10330-1616763600-1616769000@math.bas.bg
SUMMARY:Семинар "Алгебра и логика"
DESCRIPTION:На 26 март 2021 г. (петък) от 13:00 часа ще се проведе дистанционно заседание на семинара по „Алгебра и логика”. \nДоклад на тема \nSome axioms about rationality in infinite concurrent multiplayer games with ordered objectives and temporary coalitions in QCTL*\nще изнесе Димитър Гелев (ИМИ – БАН). \nРезюме. Temporal winning conditions appear in both terminating and infinite games. Reachability (guarantee) winning conditions appear in terminating games. Safety conditions and conditions higher up in the (Manna & Pnueli\, 1989) hierarchy appear in non-terminating games. In a multiplayer game\, the latter classes of winning conditions are natural to drive players into forming permanent coalitions as the longevity of a coalition needs to match the duration of its agenda\, which may take entire infinite plays to implement. However\, a lifelong joint agenda is often inconsistent with the ability of players to change alliances\, especially if there are multiple objectives with preference. The dedicated constructs of established logical notations for strategic behaviour such as Alternating-time Temporal Logic (ATL\, Alur Henzinger and Kupferman\, ICALP 1997\, J. of the ACM\, 2002) and Strategy Logic (SL\, Chatterjee\, Henzinger and Piterman\, I& C\, 2010\, Mogavero\, Murano and Vardi\, FST TCS 2010)\, in their now many variants and extensions\, are off-the-shelf for permanent coalitions only. To the best of our knowledge\, no dedicated constructs such as those of ATL and SL are available for temporary coalitioning. \nIn this talk we fall back onto Quantified Computation Tree Logic\, QCTL*\, which admits embeddings of both ATL and SL\, and is now an established intermediate notation for logics for strategic ability\, largely because of its decidability on the unwindings of finite models (French\, Australian AI 2001\, Ph.D. Thesis 2006\, Laroussinie and Markey\, LMCS 2014). The embedding of ATL was introduced in (Da Costa Lopez et al\, CONCUR 2012)\, and independently by myself in (Guelev\, SR 2013). Elements can be identified already in the correspondence between ATL’s 2002 and 1997 semantics in (Goranko and Jamroga\, Synthese 2004). \nWe propose a vocabulary which extends this embedding to allow temporary coalitions. We illustrate its use to formulate example sufficient conditions for the rationality of shifting coalition structure and decisions in the extension of QCTL* by a temporal form of a binary preference operator after (Von Wright\, 1963) which we introduced in (Guelev\, CoRR 2020). The conditions reflect naive game-theoretic reasoning and are considered to become part of analogons to backward induction to infinite concurrent games with ordered objectives. We adopt ordered objectives from the thorough study of pure Nash equilibria concurrent ω-regular games without coalitioning in (Bouyer\, Brenguier and Markey and Ummels\, FoSSaCS 2012\, LMCS 2015). \nKeywords: strategic ability\, temporary coalitions\, rational synthesis\, ordered objectives\, concurrent multiplayer games \nСеминарът ще се проведе посредством платформата Zoom и всеки желаещ може да се присъедини като последва линка: \nhttps://us02web.zoom.us/j/85137375021?pwd=RE5QczdFTE1xL1R6MnI2b1lkcGczQT09 \nTopic: Онлайн семинар на секция “Алгебра и логика”\nTime: Mar 26\, 2021 01:00 PM Sofia\nMeeting ID: 851 3737 5021\nPasscode: 035647 \n  \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%b0-44/
LOCATION:Zoom
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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BEGIN:VEVENT
DTSTART;VALUE=DATE:20210329
DTEND;VALUE=DATE:20210403
DTSTAMP:20260702T024704
CREATED:20210325T102042Z
LAST-MODIFIED:20210325T102042Z
UID:10384-1616976000-1617407999@math.bas.bg
SUMMARY:Recent Developments in Hodge Theory - виртуална конференция
DESCRIPTION:Международният център по математически науки (МЦМН) към ИМИ-БАН \nВи кани да вземете участие във виртуална конференция \nRecent Developments in Hodge Theory\,\nMarch 29 – April 02\, 2021\,\nорганизирана съвместно с \nInstitute of the Mathematical Sciences of the Americas at the University of Miami (IMSA)\nПодробности ще намерите на сайта на международния център: https://icms.bg/recent-developments-in-hodge-theory/
URL:https://math.bas.bg/event/recent-developments-in-hodge-theory-%d0%b2%d0%b8%d1%80%d1%82%d1%83%d0%b0%d0%bb%d0%bd%d0%b0-%d0%ba%d0%be%d0%bd%d1%84%d0%b5%d1%80%d0%b5%d0%bd%d1%86%d0%b8%d1%8f/
LOCATION:Онлайн
CATEGORIES:Конференция
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BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20210329T143000
DTEND;TZID=Europe/Sofia:20210329T160000
DTSTAMP:20260702T024704
CREATED:20210329T091847Z
LAST-MODIFIED:20210329T091958Z
UID:10406-1617028200-1617033600@math.bas.bg
SUMMARY:Семинар "Дидактическо моделиране"
DESCRIPTION:Поредната сбирка на семинара \nДидактическо моделиране\nще се проведе на 29.03.2021 г. от 14:30 ч. в зала 278. Доклад на тема \n Анализ на педагогически практики на ръководители на школи по математическа лингвистика – изследване на случаи\n\nще изнесе \nас. Веселин Златилов Стамов\n \nJoin Zoom Meeting \nhttps://us02web.zoom.us/j/81081205303?pwd=ZVY5RU40Q09KVjdwWGhIOGpMQ1Bydz09 \nTopic: Семинар Дидактическо моделиране\nTime: Mar 29\, 2021 14:00 Sofia\nMeeting ID: 810 8120 5303\nPasscode: 030043 \n 
URL:https://math.bas.bg/event/%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%b4%d0%b8%d0%b4%d0%b0%d0%ba%d1%82%d0%b8%d1%87%d0%b5%d1%81%d0%ba%d0%be-%d0%bc%d0%be%d0%b4%d0%b5%d0%bb%d0%b8%d1%80%d0%b0%d0%bd%d0%b5-9/
LOCATION:Zoom
CATEGORIES:Редовен семинар
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20210330T130000
DTEND;TZID=Europe/Sofia:20210330T143000
DTSTAMP:20260702T024704
CREATED:20210324T184126Z
LAST-MODIFIED:20210324T184126Z
UID:10375-1617109200-1617114600@math.bas.bg
SUMMARY:Семинар “Problems and Methods Related to Coding Theory“
DESCRIPTION:Семинарът  \nProblems and Methods Related to Coding Theory\,\nорганизиран от \nИМИ – БАН\, Секция “Математически основи на информатиката”\, \n Novosibirsk State University\, Novosibirsk\, Russia\, и \n Sobolev Institute of Mathematics\, Siberian Branch of  the Russian Academy of Sciences\, Novosibirsk\, Russia \nВи кани на поредната си сбирка\, на която \nAssist. Prof. Ivan Mogilnykh\, Novosibirsk State University\,\nще изнесе доклад на тема: \nCompletely regular codes in Johnson and Grassmann graphs\nAbstract. Completely regular codes in Johnson and Grassmann graph are interrelated with t-designs. In this talk we give an introduction to these codes and discuss several old and recent results. Martin noted that any (k-1)-(n\,k\,1)-design D is a completely regular code in the Johnson graph J(n\,k). Avgustinovich and Mogilnykh showed that {B:|B|=k+1\, B does not contain any blocks of D} is a completely regular code in J(n\,k+1). \nWe prove that when D is the Steiner quadruple system of the extended Hamming code of length n one can obtain the following completely regular code in J(n\,6): {B:|B|=6\, B does not contain any blocks of D}. \nAnalogous ideas yield a completely regular code in Grassmann graph Jq(n\,4) from Desarguesian line spread. \nСтраница на семинара: http://www.math.bas.bg/moiuser/PMCT/ \n Семинарът ще се проведе онлайн на 30 март (вторник) 2021 г. от 13:00 часа. \nJoin Zoom Meeting \nhttps://us02web.zoom.us/j/85193428253?pwd=NzIycEVQb0NEMzFReVE1aTVOU3JWQT09\nZoom ID: 851 9342 8253\nPasscode: 970063
URL:https://math.bas.bg/event/%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-problems-and-methods-related-to-coding-theory-2/
LOCATION:Zoom
CATEGORIES:Работен семинар,Редовен семинар
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BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20210330T180000
DTEND;TZID=Europe/Sofia:20210330T193000
DTSTAMP:20260702T024704
CREATED:20210324T185435Z
LAST-MODIFIED:20210324T185539Z
UID:10378-1617127200-1617132600@math.bas.bg
SUMMARY:Семинар на секция “Математически основи на информатиката”
DESCRIPTION:Секция „МАТЕМАТИЧЕСКИ ОСНОВИ НА ИНФОРМАТИКАТА“ \nорганизира семинар по проект \n„Стратегии за подобряване на качеството на моделите\, намерени от алгоритми за машинно обучение с приложение към квантовата томография“. \nДоклад ще изнесат: \nВиолета Иванова-Ролинг и Никлас Ролинг\nна тема: \nQuantum state tomography as a numerical optimization problem\nАбстракт: We present a framework that formulates the quest for the most efficient quantum state tomography scheme as an optimization problem which can be solved numerically. This approach can be applied to a broad spectrum of relevant setups including measurements restricted to a subsystem. To illustrate the power of this method we present results for the six-dimensional Hilbert space constituted by a qubit-qutrit system\, which could be realized e.g. by the N-14 nuclear spin-1 and two electronic spin states of a nitrogen-vacancy center in diamond. Measurements of the qubit subsystem are expressed by projectors of rank three\, i.e.\, projectors on half-dimensional subspaces. For systems consisting only of qubits\, it was shown analytically that a set of projectors on half-dimensional subspaces can be arranged in an informationally optimal fashion for quantum state tomography\, thus forming so-called mutually unbiased subspaces. Our method goes beyond qubits-only systems and we find that in dimension six such a set of mutually-unbiased subspaces can be approximated with a deviation irrelevant for practical applications. \nСеминарът ще се проведе на 30 март (вторник) 2021 г. от 18:00 часа онлайн чрез Zoom. \nJoin Zoom Meeting\nhttps://us02web.zoom.us/j/89537593729?pwd=Wm9LYmhNeEZ5YlNkaGQvblNwMnlZdz09 \nMeeting ID: 895 3759 3729\nPasscode: 021763
URL:https://math.bas.bg/event/%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-problems-and-methods-related-to-coding-theory-3/
LOCATION:Zoom
CATEGORIES:Работен семинар,Редовен семинар
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END:VCALENDAR