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X-WR-CALDESC:Събития за Institute of Mathematics and Informatics
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DTSTART;TZID=Europe/Sofia:20260112T140000
DTEND;TZID=Europe/Sofia:20260112T163000
DTSTAMP:20260405T064226
CREATED:20260111T123322Z
LAST-MODIFIED:20260111T123546Z
UID:18740-1768226400-1768235400@math.bas.bg
SUMMARY:Семинар по особености
DESCRIPTION:Кога и къде: 12.01.2026 г.\, понеделник\, от 14:00 ч. в зала 578 на ИМИ – БАН\nДокладчик:  Валдемар Цанов (ИМИ – БАН)\nЗаглавие на доклада: Geometry of Milnor fibrations of equivariant plane curves\nРезюме: The local knot of an irreducible C*-equivariant complex plane curve singularity is a torus knot\, and the Milnor fiber is a Seifert surface for this knot. I will describe an explicit universal cover of the Milnor fiber by the hyperbolic plane\, using automorphic forms for triangle groups. The characteristic morphism of the Milnor fibration can also be recovered\, and used to construct geometric structures by universal covers on the knot complement in the 3-sphere\, as well as on the complement of the singular curve in the complex plane.
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%be%d1%81%d0%be%d0%b1%d0%b5%d0%bd%d0%be%d1%81%d1%82%d0%b8-3/
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:20251118T130000
DTEND;TZID=Europe/Sofia:20251118T153000
DTSTAMP:20260405T064226
CREATED:20251118T095857Z
LAST-MODIFIED:20251118T095857Z
UID:18584-1763470800-1763479800@math.bas.bg
SUMMARY:Съвместно заседание на Семинара по особености и Семинара на МЦМН
DESCRIPTION:Joint meeting of the Seminar on Singularities and the ICMS Seminar\, with a lecture by Pablo Cuadrado. The program is as follows.\n\nTuesday\, November 18\, room 403\, IMI-BAS.\n\n13:00 — Giovane Galindo (ICMS\, IMI-BAS)\nBundle-type sub-Riemannian structures on holonomy bundles\n\n14:00 — Pablo Portilla Cuadrado (Universidad Politécnica de Madrid)\nThe medial axis of the Milnor fiber\n\nAbstract (Galindo): In this talk we present the notion of Gromov-Hausdorff distance\, a novel field of study that aims to understand the topology of the moduli space of Riemannian metrics on a given manifold. We will then present new results on the subject concerning the collapse of principal bundles onto reductive homogeneous spaces.\n\nAbstract (Cuadrado): Let f(x\,y) define an isolated singularity at the origin. In this talk we explore a new flat metric induced on the Milnor fiber of f by the associated complex Hamiltonian vector field. With the help of this metric we can define a spine on each Milnor fiber via the classical method of the medial axis. This spine depends on the choice of boundary for the Milnor fiber. It is subanalytic and comes equipped with a retraction from the boundary onto it. We hope to understand the geometry of the versal unfolding space via these spines. This ongoing joint work with Norbert A’Campo.
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%bf%d0%be-%d0%be%d1%81/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20251027T140000
DTEND;TZID=Europe/Sofia:20251027T153000
DTSTAMP:20260405T064226
CREATED:20251026T081914Z
LAST-MODIFIED:20251026T081914Z
UID:18392-1761573600-1761579000@math.bas.bg
SUMMARY:Семинар по особености
DESCRIPTION:Следващата сбирка на Семинара по особености ще се състои в понеделник (27.10) от 14:00 часа в зала 578. Д-р Ерик Паeмуру (ИМИ-БАН) ще изнесе доклад на тема \,\, Log canonical thresholds of reduced plane curves”. Абстрактът на неговия доклад е приложен по-долу.\n\nSpeaker:  Erik Paemurru (IMI-BAS)\nTitle: Log canonical thresholds of reduced plane curves\nAbstract: I will give an overview of normal forms of plane curve singularities and define the log canonical threshold. I will then compute log canonical thresholds of all reduced plane curve singularities of degree at most five and all reduced plane curve singularities of degree d and multiplicity d-1. This is based on the works https://arxiv.org/abs/2404.18238 and https://arxiv.org/abs/2508.21676
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%be%d1%81%d0%be%d0%b1%d0%b5%d0%bd%d0%be%d1%81%d1%82%d0%b8-2/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Редовен семинар
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