tbranzov

17 02, 2022

Birational geometry of sextic double solids with a compound A_n singularity
Birational geometry of sextic double solids with a compound A_n singularity

Birational geometry of sextic double solids with a compound A_n singularity

tbranzov2022-10-27T15:14:54+03:00February 17th, 2022|Joint ICMS & IMSA Seminar|

Sextic double solids, double covers of ℙ^3 branched along a sextic surface, are the lowest degree Gorenstein Fano 3-folds, hence are expected to behave very rigidly in terms of birational geometry. Smooth sextic double solids, and those which are ℚ-factorial with ordinary double points, are known to be birationally rigid. In this talk, we discuss birational geometry of sextic double solids with an isolated compound A_n singularity. I have shown that n is at most 8, and that rigidity fails for n > 3.

9 02, 2022

On the Geometry of Cubics
On the Geometry of Cubics

On the Geometry of Cubics

tbranzov2022-02-09T09:55:23+02:00February 9th, 2022|Joint ICMS & IMSA Seminar|

The International Center for Mathematical Sciences – Sofia (ICMS-Sofia) [...]

4 02, 2022

Windows and Geometric Invariant Theory
Windows and Geometric Invariant Theory

Windows and Geometric Invariant Theory

tbranzov2022-02-04T13:05:05+02:00February 4th, 2022|Joint ICMS & IMSA Seminar|

The theory of windows was introduced relatively recently by both Halpern-Leistner and Ballard, Favero and Katzarkov, and is a great tool to study derived categories of algebraic varieties that appear as GIT constructions, as well as their behaviour at wall crossings as we vary the stability conditions.

2 02, 2022

Sampling with Minimal Energy: A talk in commemoration of Bl. Sendov’s 90th birth date.
Sampling with Minimal Energy: A talk in commemoration of Bl. Sendov’s 90th birth date.

Sampling with Minimal Energy: A talk in commemoration of Bl. Sendov’s 90th birth date.

tbranzov2022-02-07T11:04:25+02:00February 2nd, 2022|Consortium Distinguished Lecture Series|

The International Center for Mathematical Sciences at the Institute of Mathematics and Informatics (ICMS–Sofia) will commemorate the 90th anniversary of the birth of Prof. Sendov with a special talk by Edward Saff from Vanderbilt University, USA - "Sampling with Minimal Energy: A talk in commemoration of Bl. Sendov's 90th birth date."

2 02, 2022

90th anniversary of the birth of Professor Blagovest Sendov
90th anniversary of the birth of Professor Blagovest Sendov

90th anniversary of the birth of Professor Blagovest Sendov

tbranzov2022-07-18T13:30:18+03:00February 2nd, 2022|News|

February 8, 2022, marks the 90th anniversary of the birth of Blagovest Sendov. He passed away on January 19, 2020, shortly before reaching the age of 88. The Institute of Mathematics and Informatics and the ICMS will commemorate the 90th anniversary of the birth of Prof. Sendov with a talk by Edward Saff from Vanderbilt University, USA - "Sampling with Minimal Energy: A talk in commemoration of B. Sendov's 90th birth date."

26 01, 2022

Quantum representations and Bogomolov-Katzarkov surfaces
Quantum representations and Bogomolov-Katzarkov surfaces

Quantum representations and Bogomolov-Katzarkov surfaces

tbranzov2022-01-26T19:06:12+02:00January 26th, 2022|Joint ICMS & IMSA Seminar|

Speaker: Rodolfo Aguilar (University of Miami & IMSA) Time: January 28th, 09:30 AM Eastern Time (US and Canada) Title: Quantum representations and Bogomolov-Katzarkov surfaces

20 01, 2022

Degeneration of Cubic threefolds with nodes
Degeneration of Cubic threefolds with nodes

Degeneration of Cubic threefolds with nodes

tbranzov2022-01-20T10:40:09+02:00January 20th, 2022|Joint ICMS & IMSA Seminar|

The International Center for Mathematical Sciences – Sofia (ICMS-Sofia) [...]

11 01, 2022

Women in Mathematics in South-Eastern Europe 2021
Women in Mathematics in South-Eastern Europe 2021

Women in Mathematics in South-Eastern Europe 2021

tbranzov2022-01-11T15:50:19+02:00January 11th, 2022|Conferences|

The initiative Women in Mathematics of South-Eastern Europe, aiming at promoting the role of female mathematicians, started in Dec 2020, when the inaugural conference took place. A special distinguished guest of the inaugural conference was prof. Mina Teicher from the Department of Mathematics and Gonda Brain Research Center, Bar-Ilan University, Israel, Director of Emmy Noether Institute for Mathematics. Information about the first conference is available at: https://icms.bg/women-in-math-2020/.

11 11, 2021

From Turaev to Rokhlin via VOA Characters and Curve Counting, by Sergey Gukov
From Turaev to Rokhlin via VOA Characters and Curve Counting, by Sergey Gukov

From Turaev to Rokhlin via VOA Characters and Curve Counting, by Sergey Gukov

tbranzov2021-11-23T21:48:28+02:00November 11th, 2021|Consortium Distinguished Lecture Series|

These lectures will present a board survey of recent work on new q-series invariants of 3-manifolds labeled by Spin-C structures. While the original motivation for studying these invariants is rooted in topology, they exhibit a number of unexpected properties and connections to other areas of mathematics, e.g. turn out to be characters of logarithmic vertex algebras. The integer coefficients of these q-series invariants can be understood as the answer to a certain enumerative problem, and when q tends to special values these invariants relate to other invariants of 3-manifolds labeled by Spin and Spin-C structures.

8 11, 2021

Fulbright Executive Director Angela Rodel visited the ICMS-Sofia
Fulbright Executive Director Angela Rodel visited the ICMS-Sofia

Fulbright Executive Director Angela Rodel visited the ICMS-Sofia

tbranzov2021-11-08T16:29:37+02:00November 8th, 2021|News|

On October 14, 2021, Ms. Angela Rodel, Executive Director of the Fulbright Bulgaria Program, and Ms. Maria Kostova, Program Officer, Bulgarian Grantees, visited the Institute of Mathematics and Informatics at the Bulgarian Academy of Sciences. They presented the work of the Bulgarian-American Fulbright Educational Exchange Commission and the opportunities it offers for scientists, researchers and PhD students. After the presentation, Ms. Rodel visited the International Center for Mathematical Sciences (ICMS), where she was hosted by the director of the Center - Prof. Oleg Mushkarov, and Prof. Lyudmil Katzarkov, scientific director of ICMS, who joined the event through zoom. Opportunities for cooperation and participation in Fulbright programs were discussed at the meeting.

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