School "Complex analysis and Operator Theory"
from
Monday, 29 November 2021 (16:50)
to
Friday, 3 December 2021 (20:25)
Monday, 29 November 2021
16:50
Connection to the school’s zoom and a greeting word from organizers
Connection to the school’s zoom and a greeting word from organizers
16:50 - 17:00
17:00
Additive combinatorics and function theory
-
Ilya Shkredov
Additive combinatorics and function theory
Ilya Shkredov
17:00 - 18:00
Additive combinatorics: discrete Fourier transform, Roth theorem, sets without solutions of linear equations
18:05
Bounded functional calculi for unbounded operators
-
Yuriy Tomilov
Bounded functional calculi for unbounded operators
Yuriy Tomilov
18:05 - 19:05
A panorama of functional calculi from the bird's eye view.
19:10
Buffon needle probability of intersecting a small neighborhood of Cantor set
-
Alexander Volberg
Buffon needle probability of intersecting a small neighborhood of Cantor set
Alexander Volberg
19:10 - 20:10
Estimate from below for the Buffon needle probability of the four-corner Cantor set
Tuesday, 30 November 2021
17:00
Additive combinatorics and function theory
-
Ilya Shkredov
Additive combinatorics and function theory
Ilya Shkredov
17:00 - 18:00
Additive combinatorics: Gowers uniformity norms, corners problem, transference principle (for primes and Sidon sets)
18:05
Bounded functional calculi for unbounded operators
-
Yuriy Tomilov
Bounded functional calculi for unbounded operators
Yuriy Tomilov
18:05 - 19:05
Basics of operator semigroups, their generators and related matters.
19:10
Buffon needle probability of intersecting a small neighborhood of Cantor set
-
Alexander Volberg
Buffon needle probability of intersecting a small neighborhood of Cantor set
Alexander Volberg
19:10 - 20:10
Fourier analysis for the estimate from above for the Buffon needle probability of the four-corner Cantor set
Wednesday, 1 December 2021
17:00
Additive combinatorics and function theory
-
Ilya Shkredov
Additive combinatorics and function theory
Ilya Shkredov
17:00 - 18:00
Additive combinatorics: integer sets with small Wiener norm on integers, Littlewood problem, additive energies, additive dimension and dissociativity
18:05
Bounded functional calculi for unbounded operators
-
Yuriy Tomilov
Bounded functional calculi for unbounded operators
Yuriy Tomilov
18:05 - 19:05
Introduction to the B-calculus: motivation, properties and related function theory.
19:10
Buffon needle probability of intersecting a small neighborhood of Cantor set
-
Alexander Volberg
Buffon needle probability of intersecting a small neighborhood of Cantor set
Alexander Volberg
19:10 - 20:10
Complex analysis, Riesz products for the Buffon needle's quasi singular directions
Thursday, 2 December 2021
17:00
Winston Heap : Conditional mean values of long Dirichlet polynomials.
-
Winston Heap
Winston Heap : Conditional mean values of long Dirichlet polynomials.
Winston Heap
17:00 - 17:55
Mean values of Dirichlet polynomials play an important role in analytic number theory. When the length of the sum exceeds the length of the integral they pose a significant challenge requiring techniques from number theory and harmonic analysis. The mean values of these "long" Dirichlet polynomials appear in many important open problems in number theory. In this talk we survey some of these problems and then describe how, conditionally on the Riemann hypothesis, one can compute asymptotics for the moments of long Dirichlet polynomials over primes provided they are sufficiently weighted. We also give some applications to large deviations.
18:05
Pavel Gubkin: On asymptotic boundary behaviour of orthogonal polynomials and Dirac's eigenfunctions
-
Pavel Gubkin
Pavel Gubkin: On asymptotic boundary behaviour of orthogonal polynomials and Dirac's eigenfunctions
Pavel Gubkin
18:05 - 18:50
The talk will consist of two parts. We start with the discussion of an asymptotic boundary behaviour of orthogonal polynomials on the unit circle and formulate a theorem by A. Mate, P. Nevai and V. Totik on average almost everywhere convergence. Then we discuss how the techniques from this area can be used in studying the differential operators of Dirac type.
19:10
Buffon needle probability of intersecting a small neighborhood of Cantor set
-
Alexander Volberg
Buffon needle probability of intersecting a small neighborhood of Cantor set
Alexander Volberg
19:10 - 20:10
Combinatorics: why the measure of quasi singularity directions is rather small
Friday, 3 December 2021
17:00
Additive combinatorics and function theory
-
Ilya Shkredov
Additive combinatorics and function theory
Ilya Shkredov
17:00 - 18:00
Additive combinatorics: almost periodicity of convolutions, Croot-Sisask theorem, applications to linear equations and sets with small doubling
18:05
Bounded functional calculi for unbounded operators
-
Yuriy Tomilov
Bounded functional calculi for unbounded operators
Yuriy Tomilov
18:05 - 19:05
Some applications of the B-calculus and its further perspectives.
19:10
Buffon needle probability of intersecting a small neighborhood of Cantor set
-
Alexander Volberg
Buffon needle probability of intersecting a small neighborhood of Cantor set
Alexander Volberg
19:10 - 20:25
Algebra and Number theory: cyclotomic polynomials and Linear Multi-Polygon Relations, Gelfond--Baker theorem and Hilbert's 7th problem