Mathematics and Mechanics Faculty, St.Petersburg State University

 
 

 


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Congratulations!

The Chebyshev Lab congratulates Aleksandr Logunov for the Clay Research Award! 

This has led to the solution of long-standing problems in spectral geometry, for instance the optimal lower bound on the measure of the nodal set of an eigenfunction of the Laplace-Beltrami operator in a compact smooth manifold (Yau and Nadirashvili's conjectures).


Chebyshev Lab Colloquium

 D. Grigoriev (Universite de Lille) will give a talk "Newton-Puiseux series for non-holonomic D-modules and
factoring linear partial di erential operators"
 on Thursday, April 20, 17:15, room 14.

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Chebyshev Lab Minicourse

  Zhan Shi (Lame Chair)

"Branching random walks"

Lecture 1: Thursday 13.04, 15:25.

Branching random walks and branching Brownian motions are branching systems where each individual, also referred to as particle, is associated with a spatial parameter representing the fitness value of the individual. They are connected to Fisher-Kolmogorov-Petrovskii-Piskunov (F-KPP) partial differential equations, logarithmically correlated Gaussian fields including the two-dimensional Gaussian free field, Liouville Brownian motion, planar quadrangulations, Derrida's Generalized Random Energy Model (GREM) of spin glasses. I am going to give an elementary and self-contained introduction to the study of the structure of extreme positions in branching random walks and branching Brownian motions.


Dubna summer school

Chebyshev Laboratory  announces the competition for students. More details.


Chebyshev Lab Minicourse

Sergey Yagunov (PDMI) will give a lecture course "Foundations of algebraic topology"

Lecture 1: Tuesday 4.04, 17:00, room 413.

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Chebyshev Lab Minicourse

Ivan Losev (Northeastern University) will give a lecture course "Around the representations of quivers"

Schedule:
 
Lecture 1: Monday 27.03, 17:00 – 18:30, room 413.
Lecture 2: Tuesday 28.03, 17:00 – 18:30, room 413.
Lecture 3: Wednesday 29.03, 17:00 – 18:30, room 413.
Lecture 4: Friday 31.03, 17:00 – 18:30, room 413.
 

Chebyshev Lab Colloquium

Ivan Losev (Northeastern University) will give a talk "Orbit method via deformations of singular symplectic varieties" on Thursday, March 30, 17:15, room 14.

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Chebyshev Lab Minicourse

Dmitri Yafaev  (Université Rennes) will give a lecture course "Moment problems and Hankel operators"

Schedule:

Lecture 1: «Moment problems»,  Saturday 11.03, 11:00 – 12:30, room413.
Lecture 2: «Hankel operators», Thursday 16.03, 15:00 – 16:30 room 413.
Lecture 3: «Jacobian matrices», Thursday 23.03, 15:00 – 16:30, room 413.
Lecture 4: «Orthogonal polynomials», Thursday 30.03, 15:00 – 16:30, room 413.

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Joint Colloquium of Chebyshev Laboratory and Steklov Mathematical Institute

Victor A. Vassiliev (Steklov Mathematical Institute and Higher School of Economics, Moscow) will give a talk "Multidimensional Newton’s lemma on integrable domains and monodromy theory" on Thursday, March 9, 17:00, Marble hall (Steklov Mathematical Institute, Fontanka 27).

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Chebyshev Lab Colloquium

Mihail Skopenko (HSE) will give a talk "Discrete field theory -- symmetries and conservation laws" on Tuesday, February 14, 17:15, room 14.

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Chebyshev Lab Colloquium

Nikita Kalinin (CINVESTAV) will give a talk "Points covered by a large number of triangles" on Thursday, January 12, 17:15, room 14.

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Lame Chair 2017 - 2018

Lame Chair Prize 2017 - 2018 is open for application. All information can be found at the Chebyshev Lab or at the Embassy of France.


Congratulations!

The Chebyshev Lab congratulates

  • Platonova Maria for the second prize in The Twentieth Mobius Contest,
  • Stavrova Anastasia for the first prize in The Yong Russian Math contest 2016,
  • Tihomirov Sergey for the first prize in The Yong Russian Math contest 2016.

Chebyshev Lab Lecture

N. K. Nikolskii will give a lecture "Hidden spectrum of integral operators (two examples)"  on Wednesday, 28 December in 13:30, room 14.

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Chebyshev Lab Minicourse

G. Uraltsev (Bonn University) will give a lecture course "Time-frequency analysis of modulation invariant operators using outer measure spaces".

Schedule:

Wednesday 21.12, room 413, 17:30

Friday 23.12, room 413, 17:00

Abstract:

The set of tools often referred to as time-frequency analysis was introduced by Lennart Carleson in his seminal paper on the point-wise a.e. convergence of the Fourier series for $L^2$ functions. From a more general perspective, time-frequency analysis tries to put together the theory of operators defined by highly oscillatory integrals with Calderon-Zygmund theory of singular integral operators. We will study two prime examples of operators in time-frequency analysis: the Bilinear Hilbert Transform and the Maximal Carleson operator. Both these operators have an additional modulation symmetry besides the translation and scaling symmetries of Calderon-Zygmund operators. We will show how the theory of outer measure L^p spaces on the time-frequency-scale space of symmetries provides an efficient functional framework for dealing with the above operators.


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14th Line 29B, Vasilyevsky Island, St.Petersburg 199178, RUSSIA

Tel.: (+7-812) 363-68-71

secretariat@chebyshev.spb.ru