BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Institute of Mathematics and Informatics - ECPv6.0.8//NONSGML v1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-ORIGINAL-URL:https://math.bas.bg
X-WR-CALDESC:Събития за Institute of Mathematics and Informatics
REFRESH-INTERVAL;VALUE=DURATION:PT1H
X-Robots-Tag:noindex
X-PUBLISHED-TTL:PT1H
BEGIN:VTIMEZONE
TZID:Europe/Sofia
BEGIN:DAYLIGHT
TZOFFSETFROM:+0200
TZOFFSETTO:+0300
TZNAME:EEST
DTSTART:20240331T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0300
TZOFFSETTO:+0200
TZNAME:EET
DTSTART:20241027T010000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20241022T140000
DTEND;TZID=Europe/Sofia:20241022T153000
DTSTAMP:20260405T235346
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:20260405T235346
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
END:VCALENDAR