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X-WR-CALDESC:Събития за Institute of Mathematics and Informatics
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BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20240109T140000
DTEND;TZID=Europe/Sofia:20240109T153000
DTSTAMP:20260418T023858
CREATED:20240104T172534Z
LAST-MODIFIED:20240104T172819Z
UID:15789-1704808800-1704814200@math.bas.bg
SUMMARY:Семинар на МЦМН
DESCRIPTION:Дата: 09.01.2024 г.\, 14:00 ч. \nМясто: Зала 403\, ИМИ – БАН \nДокладчик: д-р Антони Рангачев\, ИМИ – БАН \nДоклад: Stratified Morse theory and the critical locus of a linear functional \nДопълнителна информация: https://icms.bg/stratified-morse-theory-and-the-critical-locus-of-a-linear-functional-talk-by-antony-rangachev/ \nРезюме. In this talk I will use stratified Morse theory to relate the number of critical points of a generic linear functional on a complex analytic manifold M to the Euler characteristics of M and a generic hyperplane slice of M.
URL:https://math.bas.bg/event/%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-15/
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:20240111T140000
DTEND;TZID=Europe/Sofia:20240111T153000
DTSTAMP:20260418T023858
CREATED:20240104T175203Z
LAST-MODIFIED:20240104T175203Z
UID:15795-1704981600-1704987000@math.bas.bg
SUMMARY:Семинар на МЦМН
DESCRIPTION:Дата: 11.01.2024 г.\, 14:00 ч. \nМясто: Зала 403\, ИМИ – БАН \nДокладчик: д-р Антони Рангачев\, ИМИ – БАН \nДоклад: The Milnor number of a smoothable curve \nДопълнителна информация: https://icms.bg/the-milnor-number-of-a-smoothable-curve-talk-by-antony-rangachev/ \nРезюме. In this talk I will derive an algebraic formula for the Milnor number of a smoothable complex analytic curve singularity X by relating it to the Euler characteristic of its smoothing\, which in turn I will relate to the multiplicity of the Jacobian ideal of X and and the multiplicity of X at its singular point. If time permits I will discuss generalizations to higher dimensions. This is a report on a joint work with Gaffney and Bengus-Lasnier. \n 
URL:https://math.bas.bg/event/%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-16/
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:20240116T140000
DTEND;TZID=Europe/Sofia:20240116T153000
DTSTAMP:20260418T023858
CREATED:20240112T124026Z
LAST-MODIFIED:20240112T124026Z
UID:15841-1705413600-1705419000@math.bas.bg
SUMMARY:Семинар на МЦМН
DESCRIPTION:Дата: 16.01.2024 г.\, 14:00 ч. \nМясто: Зала 403\, ИМИ – БАН \nДокладчик: Carlos Varea (Universidade Tecnológica  Federal do Paraná – Campus Cornélio Procópio\, Brazil) \nДоклад: The H-flux on flag manifolds generated by infinitesimal T-duality \nДопълнителна информация: https://icms.bg/the-h-flux-on-flag-manifolds-generated-by-infinitesimal-t-duality-talk-by-carlos-varea/ \nРезюме. In this talk we present a new correspondence for pairs \((\mathbb{F}\,H)\) formed by a flag manifold \(\mathbb{F}\) together with an $H$-flux on \(\mathbb{F}\). Given its role within our correspondence\, infinitesimal \(T\)-duality may be viewed as a source of \(H\)-flux\, in the sense that it contributes towards taking fluxless pairs \((\mathbb{F}\,0)\) to pairs \((\mathbb{F}^\vee\, H^\vee)\) carrying nontrivial flux \(H^\vee\neq 0\). We also illustrate how our correspondence exchanges complex structures with symplectic ones up to \(B\)-transformations. This is a joint work with Elizabeth Gasparim and Lino Grama.
URL:https://math.bas.bg/event/%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-17/
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:20240118T130000
DTEND;TZID=Europe/Sofia:20240118T143000
DTSTAMP:20260418T023858
CREATED:20240110T072831Z
LAST-MODIFIED:20240114T173529Z
UID:15812-1705582800-1705588200@math.bas.bg
SUMMARY:Съвместно заседание на Семинара на секция „Алгебра и логика” и Семинара на МЦМН
DESCRIPTION:На 18 януари 2024 г. (четвъртък) от 13:00 часа в зала 403 на ИМИ-БАН и онлайн чрез платформата zoom ще се проведе съвместно заседание на \nСеминара на секция „Алгебра и логика” \nи Семинара на Международния център по математически науки към ИМИ-БАН. \nДоклад на тема \nNilpotent algebras\, groups and beyond\nще изнесе Yuri Bahturin (Memorial University of Newfoundland\, Canada) (joint work with Alexander Olshanskii). \nАбстракт: We study various correspondences between finite-dimensional nilpotent algebras and (quasi)groups similar to those given by the circle product in the case of associative algebras or by the Baker-Campbell-Hausdorff formulas in the the case of Lie algebras or their generalizations. In the particular case of Malcev’s correspondence\, we obtain some new results about groups using Lie algebras and vice versa. \nЛинк към zoom-стаята на семинара:\nhttps://us02web.zoom.us/j/85137375021?pwd=RE5QczdFTE1xL1R6MnI2b1lkcGczQT09 \nПоканват се всички желаещи да присъстват. \nОт секция „Алгебра и логика” и МЦМН\nhttp://www.math.bas.bg/algebra/seminarAiL/\nhttps://icms.bg/category/icms-seminar/\n===================================================
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%bd%d0%b0-%d1%81%d0%b5/
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%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:20240124T160000
DTEND;TZID=Europe/Sofia:20240124T173000
DTSTAMP:20260418T023858
CREATED:20240122T092832Z
LAST-MODIFIED:20240122T092833Z
UID:15875-1706112000-1706117400@math.bas.bg
SUMMARY:Семинар по геометрия на МЦМН
DESCRIPTION:Следващата сбирка на Семинара по геометрия на МЦМН\nще се проведе в сряда\, 24 януари 2024 г. от 16:00 ч. в зала 403 и онлайн в Zoom: \nДоклад на тема \nIntroduction to Derived Algebraic Geometry and deformation theory\n\nще изнесе Инди Чин\, ИМИ – БАН. \n\nZoom link:\n\nhttps://us02web.zoom.us/j/83740034721?pwd=VnBtcVpGUktscHQ4a09jZkNZTURyZz09
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-6/
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:20240130T140000
DTEND;TZID=Europe/Sofia:20240130T153000
DTSTAMP:20260418T023858
CREATED:20240126T111458Z
LAST-MODIFIED:20240126T111458Z
UID:15887-1706623200-1706628600@math.bas.bg
SUMMARY:Семинар на МЦМН
DESCRIPTION:Дата: 30.01.2024 г.\, 14:00 ч. \nМясто: Зала 403\, ИМИ – БАН \nДокладчик: Владимир Митанкин\, ИМИ – БАН \nДоклад: Density of Hasse failures for diagonal affine cubic surfaces \nДопълнителна информация: https://icms.bg/density-of-hasse-failures-for-diagonal-affine-cubic-surfaces-a-talk-by-vladimir-mitankin/ \nРезюме. А question of Mordell asks which integers are the sum of three cubes provided that there are no local obstructions to that. While Mordell’s question seems out of reach with the current machinery\, it is widely believed that every integer not congruent to 4 or 5 mod 9 is a sum of three integral cubes. If\, instead of the sum of three cubes\, a general ternary cubic is considered\, local conditions no longer suffice for solubility\, i.e. the integral Hasse principle may fail. In this talk we shall apply the integral version of the Brauer-Manin obstruction to construct the first examples of such failures not explained by local conditions in the setting of affine diagonal ternary cubics. We will then explore in three different natural ways how such failures are distributed across the family of affine diagonal ternary cubics. \nThis talk is based on a joint work with Harkaran Uppal and Julian Lyczak.
URL:https://math.bas.bg/event/%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-18/
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:20240131T160000
DTEND;TZID=Europe/Sofia:20240131T173000
DTSTAMP:20260418T023858
CREATED:20240130T125552Z
LAST-MODIFIED:20240130T125552Z
UID:15893-1706716800-1706722200@math.bas.bg
SUMMARY:Семинар по геометрия на МЦМН
DESCRIPTION:Следващата сбирка на Семинара по геометрия на МЦМН\nще се проведе в сряда\, 31 януари 2024 г. от 16:00 ч. в зала 403 и онлайн в Zoom: \nДоклад на тема \nDerived Deformation Theory and Formal Moduli Problem\n\nще изнесе Инди Чин\, МЦМН и ИМИ – БАН. \n\nZoom link:\n\nhttps://us02web.zoom.us/j/83740034721?pwd=VnBtcVpGUktscHQ4a09jZkNZTURyZz09\n\nAbstract: Derived deformation theory studies the formal neighborhoods of moduli spaces. The classical work of Kodaira-Spencer on deformation of complex manifolds tells that the dg Lie algebra A^(0\,*)(X\,TX) controls the deformations of the complex manifold. The example illustrates the following general principle: A dg Lie algebra gives rise to a deformation functor by considering the  Maurer-Cartan elements of the dg Lie algebra tensoring with the maximal ideal of an Artin local ring. This idea is explored by many people\, including  Quillen\, Deligne\, Drinfeld\,  Kapranov and Kontesevich. Later\, Lurie and Pridham independently proved that the category of dg Lie algebra is indeed equivalent to the category of Formal Moduli problem. I will state their results and explain the idea of the proof.
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-7/
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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