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X-WR-CALDESC:Събития за Institute of Mathematics and Informatics
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BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20240214T140000
DTEND;TZID=Europe/Sofia:20240214T153000
DTSTAMP:20260503T013016
CREATED:20240212T233345Z
LAST-MODIFIED:20240212T234428Z
UID:15964-1707919200-1707924600@math.bas.bg
SUMMARY:Национален семинар по стохастика
DESCRIPTION:Поредната сбирка на \nНационалния семинар по стохастика\nще се проведе на 14 февруари 2024 г. (сряда) от 14:00 часа в зала 503 на ИМИ – БАН. \nДоклад на тема \nComputable inference for generalised Wright-Fisher processes\nще изнесе \nNathan Judd (University of Warwick\, UK). \nАбстракт.In this talk\, we will introduce a class of [0\,1]-valued Markov processes with jumps that\, as signals in hidden Markov models\, admits a computable (exact) filter. By computable filter we mean that each filtering distribution\, i.e.\, the law of the signal at a time t given the data up to time t\, is explicitly and exactly available as a finite mixture of Dirichlet distributions. We exploit the tractability of the Wright-Fisher diffusion\, in particular\, its infinite-sum transition function and its dual process\, as a base to construct a generalised version thereof\, for which we derive the (exact\, predictive and smoothing) filters of the associated hidden Markov model. In addition\, we construct an exact sampling scheme to draw samples from the transition functions of this process. \n\n 
URL:https://math.bas.bg/event/copy-%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/
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:20240214T160000
DTEND;TZID=Europe/Sofia:20240214T173000
DTSTAMP:20260503T013016
CREATED:20240212T133658Z
LAST-MODIFIED:20240212T133658Z
UID:15958-1707926400-1707931800@math.bas.bg
SUMMARY:Семинар по геометрия на МЦМН
DESCRIPTION:Следващата сбирка на Семинара по геометрия на МЦМН\nще се проведе в сряда\, 14 февруари 2024 г. от 16:00 ч. в зала 403 и онлайн в Zoom: \nДоклад на тема \nRefined curve counting\n\nще изнесе Михаил Школников\, ИМИ – БАН. \n\nZoom link:\n\nhttps://us02web.zoom.us/j/83740034721?pwd=VnBtcVpGUktscHQ4a09jZkNZTURyZz09\n\nAbstract: Refining an enumerative problem upgrades the numerical solution to a polynomial so that its specialization gives the original number. A prototypical example of such refinement arises in the tropical curve counting from replacing Mikhalkin multiplicities\, corresponding to counting complex curves\, with Block-Goettsche multiplicities. I will speak about the invariance of this count and its various interpretations.
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%b3%d0%b5%d0%be%d0%bc%d0%b5%d1%82%d1%80%d0%b8%d1%8f-%d0%bd%d0%b0-%d0%bc%d1%86%d0%bc%d0%bd-9/
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
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