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X-WR-CALDESC:Събития за Institute of Mathematics and Informatics
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BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20241001T140000
DTEND;TZID=Europe/Sofia:20241001T153000
DTSTAMP:20260625T234023
CREATED:20240926T125611Z
LAST-MODIFIED:20240926T125611Z
UID:16794-1727791200-1727796600@math.bas.bg
SUMMARY:Семинар по изследване на операциите
DESCRIPTION:На 1 октомври (вторник) от 14:00 ч. в зала 503 на ИМИ ще се състои сбирка на\nСеминара по Изследване на операциите. \nДоклад на тема \nGraphs as an universal modeling tool\nще изнесе проф. Никола Янев\, ИМИ-БАН. \nАбстракт: For a series of practical optimization problems\, we show that formulating them as graph optimization problems enables the development of competitive algorithms. The problems considered are known as: protein threading problem\, contact map overlap\, HP folding\, a new scheduling theory problem\, classification problem and the biclustering problem. The focus is on formulating them as graph optimization problems\, which are solved by using Integer programming techniques.
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%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%d1%86%d0%b8%d0%b8%d1%82%d0%b5-4/
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:20241002T140000
DTEND;TZID=Europe/Sofia:20241002T153000
DTSTAMP:20260625T234023
CREATED:20240926T130536Z
LAST-MODIFIED:20240926T130536Z
UID:16798-1727877600-1727883000@math.bas.bg
SUMMARY:Семинар на секция "Математически основи на информатиката"
DESCRIPTION:На 2 октомври 2024 г. (сряда) от 14:00 часа в зала 478 на ИМИ-БАН\nще се състои поредната сбирка на семинара на секция\n„Математически основи на информатиката”. \nДоклад на тема \nLipschitz Permutations on Certain Graphs\nще изнесе Драгомир Грозев. \nАбстракт
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%b8-%d0%be%d1%81%d0%bd%d0%be-22/
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:20241009T140000
DTEND;TZID=Europe/Sofia:20241009T153000
DTSTAMP:20260625T234023
CREATED:20241002T105535Z
LAST-MODIFIED:20241003T174002Z
UID:16822-1728482400-1728487800@math.bas.bg
SUMMARY:Семинар по изследване на операциите
DESCRIPTION:На 9 октомври (сряда) от 14:00 ч. в зала 503 на ИМИ ще се състои сбирка на\nСеминара по Изследване на операциите. \nДоклад на тема \nGraphs as an universal modeling tool\, част 2\nще изнесе проф. Никола Янев\, ИМИ-БАН. \nАбстракт: For a series of practical optimization problems\, we show that formulating them as graph optimization problems enables the development of competitive algorithms. The problems considered are known as: protein threading problem\, contact map overlap\, HP folding\, a new scheduling theory problem\, classification problem and the biclustering problem. The focus is on formulating them as graph optimization problems\, which are solved by using Integer programming techniques.
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%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%d1%86%d0%b8%d0%b8%d1%82%d0%b5-5/
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:20241014T143000
DTEND;TZID=Europe/Sofia:20241014T160000
DTSTAMP:20260625T234023
CREATED:20241002T080508Z
LAST-MODIFIED:20241002T080508Z
UID:16818-1728916200-1728921600@math.bas.bg
SUMMARY:Семинар "Дидактическо моделиране"
DESCRIPTION:Поредната сбирка на семинара \nДидактическо моделиране\nще се проведе на 14.10.2024 г. от 14:30 ч. в зала 278 на ИМИ. \nДоклад на тема \nСъстезателни задачи с покриващи оцветявания в СтруниМа\nще изнесe \nд-р Младен Вълков.
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%b5-39/
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:20241015T140000
DTEND;TZID=Europe/Sofia:20241015T153000
DTSTAMP:20260625T234023
CREATED:20241003T141157Z
LAST-MODIFIED:20241003T141242Z
UID:16844-1729000800-1729006200@math.bas.bg
SUMMARY:Общ семинар на секция "Анализ\, геометрия и топология"
DESCRIPTION:Поредното заседание на Общия семинар на секция “Анализ\, геометрия и топология” ще се проведе\nна 15 октомври 2024 г. от 14:00 часа в зала 478 на ИМИ – БАН.\nДоклад на тема: \nUnimodality Preservation by Ratios of Functional Series and Integral Transforms\nще изнесе Dmitrii Karp\, Holon Institute of Technology\, Holon\, Israel. \nПоканват се всички интересуващи се. \nРезюме. Elementary\, but very useful lemma due to Biernacki and Krzyz (1955) asserts that the ratio of two power series inherits monotonicity from that of the sequence of ratios of their corresponding coefficients. Over the last two decades it has been realized that\, under some additional assumptions\, similar claims hold for more general series ratios and integral transforms as well as for unimodality in place of monotonicity. In the talk\, we discuss conditions on the functional sequence and the kernel of an integral transform ensuring such property. Numerous series and integral transforms appearing in applications satisfy our sufficient conditions\, including Dirichlet\, factorial and inverse factorial series\, Laplace\, Mellin and generalized Stieltjes transforms\, among many others. The key role in our considerations is played by the notion of sign regularity. \n\n 
URL:https://math.bas.bg/event/copy-%d0%be%d0%b1%d1%89-%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%b0%d0%bd%d0%b0%d0%bb%d0%b8%d0%b7-%d0%b3%d0%b5%d0%be%d0%bc%d0%b5%d1%82/
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%BD%D0%B0%D0%BB%D0%B8%D0%B7%2C%20%D0%B3%D0%B5%D0%BE%D0%BC%D0%B5%D1%82%D1%80%D0%B8%D1%8F%20%D0%B8%20%D1%82%D0%BE%D0%BF%D0%BE%D0%BB%D0%BE%D0%B3%D0%B8%D1%8F":MAILTO:vmil@math.bas.bg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20241015T140000
DTEND;TZID=Europe/Sofia:20241015T153000
DTSTAMP:20260625T234023
CREATED:20241009T142051Z
LAST-MODIFIED:20241009T142051Z
UID:16881-1729000800-1729006200@math.bas.bg
SUMMARY:Семинар по изследване на операциите
DESCRIPTION:На 15 октомври (вторник) от 14:00 ч. в зала 503 на ИМИ ще се състои сбирка на\nСеминара по Изследване на операциите. \nДоклад на тема \nAsymptotic covariance matrix of Capon’s Maximum likelihood estimator and application of steered response power phase alignment algorithm in seismic array data processing\nще изнесе Александр Варипаев от секция ИОСВ. \nАбстракт: Capon’s estimator was originally developed for frequency-wavenumber power spectral density analysis. Theoretically\, it can be treated as maximum likelihood estimator of unknown vector parameter of multidimensional linear system (MLS) model with one input and m outputs.  Practically important and non-trivial case is considered\, when the number of nuisance parameters\, which are values of input deterministic signal\, tends to infinity. Under assumptions that MLS output signals distorted by random Gaussian stationary  EMBED Equation.DSMT4 -dimensional noise with known matrix power spectrum and the likelihood function of observations satisfies the conditions of local asymptotic normality\, the analytical form of limiting covariance matrix of the Capon’s estimate is given.Steered response power phase alignment algorithm (SRP-PHAT) is devoted to subclass of so called phase-based robust estimators. Mathematical basis of SRP-PHAT estimator shows its applicability to small-aperture seismic array data to solve two different tasks: frequency-wavenumber analyses and seismic source localization problems. Several experiments with real data demonstrate its advantage compared to conventional methods that are involved in most of free and commercial seismological software.
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%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%d1%86%d0%b8%d0%b8%d1%82%d0%b5-6/
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:20241022T140000
DTEND;TZID=Europe/Sofia:20241022T153000
DTSTAMP:20260625T234023
CREATED:20241009T121248Z
LAST-MODIFIED:20241009T121248Z
UID:16877-1729605600-1729611000@math.bas.bg
SUMMARY:Общ семинар на секция "Анализ\, геометрия и топология"
DESCRIPTION:Поредното заседание на Общия семинар на секция “Анализ\, геометрия и топология” ще се проведе\nна 22 октомври 2024 г. от 14:00 часа в зала 478 на ИМИ – БАН.\nДоклад на тема: \nHigher order estimates for Monge-Ampere type equations motivated by quaternionic geometry\nще изнесе Marcin Sroka\, Jagiellonian University\, Kraków\, Poland. \nПоканват се всички интересуващи се. \nРезюме. In the talk I will discuss obstacles for obtaining higher order a priori estimates for equation introduced by Alesker and Verbitsky in 2010 on HKT manifolds in relation to Calabi type conjecture on those manifolds (and similar type PDEs studied since on hypercomplex manifolds). After presenting the state of art\, I will focus on the key second order estimate. For the real Monge-Ampere equation on Riemannian manifolds it follows essentially by Pogorelov calculation\, for the complex Monge-Ampere equation\, in relation to Calabi conjecture\, it was proven by Aubin and Yau. I will use those two as comparison to underline new difficulties related to concavity properties of quaternionic Monge-Ampere operator. \nПосещението на лектора е финансирано по Научна програма ” Повишаване на изследователския капацитет в областта на математическите науки (ПИКОМ)”\, № ДО1-67/05.05.2022. \n\n 
URL:https://math.bas.bg/event/%d0%be%d0%b1%d1%89-%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%b0%d0%bd%d0%b0%d0%bb%d0%b8%d0%b7-%d0%b3%d0%b5%d0%be%d0%bc%d0%b5%d1%82%d1%80%d0%b8-23/
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%BD%D0%B0%D0%BB%D0%B8%D0%B7%2C%20%D0%B3%D0%B5%D0%BE%D0%BC%D0%B5%D1%82%D1%80%D0%B8%D1%8F%20%D0%B8%20%D1%82%D0%BE%D0%BF%D0%BE%D0%BB%D0%BE%D0%B3%D0%B8%D1%8F":MAILTO:vmil@math.bas.bg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20241022T140000
DTEND;TZID=Europe/Sofia:20241022T153000
DTSTAMP:20260625T234023
CREATED:20241015T211136Z
LAST-MODIFIED:20241015T211136Z
UID:16891-1729605600-1729611000@math.bas.bg
SUMMARY:Семинар по изследване на операциите
DESCRIPTION:На 22 октомври (вторник) от 14:00 ч. в зала 503 на ИМИ ще се състои сбирка на\nСеминара по Изследване на операциите. \nДоклад на тема \nAsymptotic covariance matrix of Capon’s Maximum likelihood estimator and application of steered response power phase alignment algorithm in seismic array data processing – част 2\nще изнесе Александр Варипаев от секция ИОСВ. \n\nАбстракт: Capon’s estimator was originally developed for frequency-wavenumber power spectral density analysis. Theoretically\, it can be treated as maximum likelihood estimator of unknown vector parameter of multidimensional linear system (MLS) model with one input and m outputs.  Practically important and non-trivial case is considered\, when the number of nuisance parameters\, which are values of input deterministic signal\, tends to infinity. Under assumptions that MLS output signals distorted by random Gaussian stationary  EMBED Equation.DSMT4 -dimensional noise with known matrix power spectrum and the likelihood function of observations satisfies the conditions of local asymptotic normality\, the analytical form of limiting covariance matrix of the Capon’s estimate is given.Steered response power phase alignment algorithm (SRP-PHAT) is devoted to subclass of so called phase-based robust estimators. Mathematical basis of SRP-PHAT estimator shows its applicability to small-aperture seismic array data to solve two different tasks: frequency-wavenumber analyses and seismic source localization problems. Several experiments with real data demonstrate its advantage compared to conventional methods that are involved in most of free and commercial seismological software.
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%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%d1%86%d0%b8%d0%b8%d1%82%d0%b5-7/
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:20241028T143000
DTEND;TZID=Europe/Sofia:20241028T160000
DTSTAMP:20260625T234023
CREATED:20241019T201028Z
LAST-MODIFIED:20241019T201028Z
UID:16916-1730125800-1730131200@math.bas.bg
SUMMARY:Семинар "Дидактическо моделиране"
DESCRIPTION:Поредната сбирка на семинара \nДидактическо моделиране\nще се проведе на 28.10.2024 г. от 14:30 ч. в зала 278 на ИМИ. \nДоклад на тема \nСтарият (не)познат Logo: примери\, идеи\, пропускани възможности\nще изнесe \nдоц. Бойко Банчев.
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%b5-40/
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:20241029T140000
DTEND;TZID=Europe/Sofia:20241029T153000
DTSTAMP:20260625T234023
CREATED:20241023T203322Z
LAST-MODIFIED:20241023T203322Z
UID:16935-1730210400-1730215800@math.bas.bg
SUMMARY:Предзащита на дисертацията на Цветелин Заевски за присъждане на научната степен “доктор на науките”
DESCRIPTION:На 29 октомври 2024 г. (вторник) от 14:00 ч. в Зала 503 на ИМИ-БАН\, в рамките на семинара на секция ИОВС\, \nще се проведе предварителна защита на проекта на дисертационен труд на \nЦветелин Стефанов Заевски \nна тема \nUtility-based approach for pricing American-style derivatives\nза присъждане на  научната степен “доктор на науките”\nв област на висше образование 4. Природни науки\, математика и информатика\,\nпрофесионално направление 4.5 Математика\,\nнаучна специалност “Теория на вероятностите и математическа статистика”. \n\nПоканват се всички интересуващи се. \nПроектът на дисертацията е на разположение в библиотеката на ИМИ – БАН. \n\n\n 
URL:https://math.bas.bg/event/%d0%bf%d1%80%d0%b5%d0%b4%d0%b7%d0%b0%d1%89%d0%b8%d1%82%d0%b0-%d0%bd%d0%b0-%d0%b4%d0%b8%d1%81%d0%b5%d1%80%d1%82%d0%b0%d1%86%d0%b8%d1%8f%d1%82%d0%b0-%d0%bd%d0%b0-%d1%86%d0%b2%d0%b5%d1%82%d0%b5%d0%bb/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Защита,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;
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