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X-WR-CALNAME:Institute of Mathematics and Informatics
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X-WR-CALDESC:Събития за Institute of Mathematics and Informatics
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TZID:Europe/Sofia
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DTSTART:20250330T010000
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DTSTART;TZID=Europe/Sofia:20250204T140000
DTEND;TZID=Europe/Sofia:20250204T153000
DTSTAMP:20260418T055501
CREATED:20250130T174422Z
LAST-MODIFIED:20250130T174422Z
UID:17270-1738677600-1738683000@math.bas.bg
SUMMARY:Семинар на МЦМН
DESCRIPTION:Дата: 04.02.2025 г.\, 14:00 ч. \nМясто: Зала 403\, ИМИ – БАН \nДокладчик: Мирослав Георгиев\, Институт по математика и информатика\, Българска академия на науките \nДоклад: Yukawa regulators in electrodynamics: Exact approach to the self-energy and anomalous g-factor \nДопълнителна информация: https://icms.bg/yukawa-regulators-in-electrodynamics-exact-approach-to-the-self-energy-and-anomalous-g-factor-icms-seminar-talk-by-miroslav-georgiev/ \nРезюме.  In the present talk\, we will discuss the prospect of electrodynamics in quantifying the self-interaction of a non-composite charged particle. We will demonstrate that under the consideration of unique to the particle Yukawa cut-offs the radial singularity in corresponding electromagnetic field potentials’ is removed allowing the classical theory to admit exact solutions for the particle’s self-energy and anomalous g-factor. Highly accurate results for the electron’s and muon’s anomalous g-factor will be presented\, with calculated values matching the most recent measurements reported in the literature to 0.59 ppt and 60 ppt\, respectively.
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-26/
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:20250211T140000
DTEND;TZID=Europe/Sofia:20250211T153000
DTSTAMP:20260418T055501
CREATED:20250130T175635Z
LAST-MODIFIED:20250130T175930Z
UID:17274-1739282400-1739287800@math.bas.bg
SUMMARY:Семинар на МЦМН
DESCRIPTION:Дата: 11.02.2025 г.\, 14:00 ч. \nМясто: Зала 403\, ИМИ – БАН \nДокладчик: Sergey Favorov\, Department of Pure Mathematics\, Kharkov National University\, Ukraine \nДоклад: Fourier quasicrystals and their generalizations\, zeros of Dirichlet series\, other almost periodic objects \nДопълнителна информация: https://icms.bg/fourier-quasicrystals-and-their-generalizations-zeros-of-dirichlet-series-other-almost-periodic-objects-icms-seminar-talk-by-sergey-favorov/ \nРезюме. A complex measure \(\mu\) on a \(d\)-dimensional Euclidean space is a crystalline measure (CM) if it is the temperate distribution\, its distributional Fourier transform \(\hat\mu\) is also a measure\, and supports of \(\mu\) and \(\hat\mu\) are discrete (locally finite); \(\mu\) is a Fourier quasicrystal (FQ) if\, in addition\, \(|\mu|\) and \(|\hat\mu|\) are also temperate distributions. For example\, if \(\mu_0\) is the sum of the unit masses at all points with integer coordinates\, then by Poisson’s formula \(\hat\mu_0=\mu_0\). Hence\, \(\mu_0\) is FQ. \nWe show a theorem of Lev-Olevskii on a sufficient condition for trivialization of FQ. Then we discuss a simple condition for CM to be FQ and present CM that is not FQ. \nWe recall the notion of an almost periodic function\, introduce the notions of almost periodic measures\, distributions\, sets\, and show their connections with CM. In paricular\, we get various uniqueness theorems for FQ. \nFinally\, we show the description of FQ with unit masses as zeros of exponential polynomials due to Olevskii and Ulanovskii\, and discuss some generalizations to zeros of Dirichlet series and to measures in a horizontal strip of finite width.
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-27/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Редовен семинар
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