Organizatorzy

prof. dr hab. Rafał Latała

Informacje

czwartki, 12:15 , sala: 3160

Strona domowa

http://lists.mimuw.edu.pl/listinfo/sem-rp

Lista referatów

4 grudnia 2025 12:15
Zong Shang (Institut Polytechnique de Paris,)
Benign Overfitting Property of the Minimum ell_q-norm Interpolant Estimator in Regression and Classification Problems (Benign Overfitting Property of the Minimum ell_q-norm Interpolant Estimator in Regression and Classification Problems)
In this talk, I will establish high-probability non-asymptotic upper bounds for the population excess risk of minimum \ell_q-norm interpolating estimators in linear regression for all q\geq 1, and minimum \ell_2-norm interpolating classifiers in linear classification. …
27 listopada 2025 12:15
Witold Bednorz (University of Warsaw)
Some remarks on GSW algorithm (Some remarks on GSW algorithm)
We present an improvement of the GSW martingale method. This has some implications for the Komlos conjecture.
20 listopada 2025 12:15
Maciej Wiśniewolski (Uniwersytet Warszawski)
On exponential functionals of isotropic Gaussian fields and related hypergeometric equations (On exponential functionals of isotropic Gaussian fields and related hypergeometric equations)
I will discuss a class of exponential integral functionals of isotropic Gaussian fields on the unit interval whose expectations satisfy a specific second-order ordinary differential equation. In a certain sense, this equation can be reduced …
6 listopada 2025 12:15
Anna Talarczyk-Noble (Uniwersytet Warszawski)
A generalized central limit theorem for critical marked Hawkes processes. (A generalized central limit theorem for critical marked Hawkes processes.)
We study marked Hawkes processes in which occurrence of an event increases the intensity of future events by a certain base intensity function multiplied by an independent mark. We are particularly interested in the case …
30 października 2025 12:15
Alexandros Eskenazis (Sorbonne Université)
On metric formulations of Kwapień's theorem (On metric formulations of Kwapień's theorem)
We will construct counterexamples to previously conjectured metric formulations of Kwapień's theorem from Banach space theory. The key new ingredient in our construction is a novel rigidity theorem for metric transforms of nonpositively curved Alexandrov …
16 października 2025 12:15
Radosław Adamczak (University of Warsaw)
Concentration of measure for nonlinear random matrices (Concentration of measure for nonlinear random matrices)
9 października 2025 12:15
Adam Osękowski (University of Warsaw)
Weighted weak-type inequalities for martingale transforms and square functions (Ważone nierówności słabego typu dla transformat martyngałowych i funkcji kwadratowych)
Rozważmy kontekst martyngałów diadycznych i występujące w nim dwa typy operatorów: transformaty martyngałowe oraz funkcje kwadratowe. Gdy 1 <= p < oo, ważone nierówności słabego typu (p,p) zachodzą dla obu tych typów, przy założeniu, że …
5 czerwca 2025 12:15
Witold Bednorz (Uniwersytet Warszawski)
Concentration properties of the truncated variation functional of fractional Brownian motions of any Hurst index (Concentration properties of the truncated variation functional of fractional Brownian motions of any Hurst index)
22 maja 2025 12:15
Lorenzo Sadun (University of Texas at Austin)
Random graphs with near-extreme triangle counts
15 maja 2025 12:15
Ioannis Kavvadias (University of Warsaw)
Follmer process: Functional Inequalities and Concentration for Convex functions (Follmer process: Functional Inequalities and Concentration for Convex functions)
10 kwietnia 2025 12:15
Adam Osękowski (Uniwersytet Warszawski)
Inequalities for a nonnegative submartingale and the nondecreasing component coming from the Doob-Meyer decomposition (Nierówności dla nieujemnego podmartyngału i składowej niemalejącej z rozkładu Dooba-Meyera)
Dowolny nieujemny podmartyngał X możemy przedstawić w postaci sumy M+A, gdzie M jest lokalnym martyngałem startującym z zera, a A jest procesem niemalejącym. W trakcie odczytu zajmiemy się optymalnym porównaniem p-tych norm procesów X i …
3 kwietnia 2025 12:15
Rafał Latała (University of Warsaw)
Upper bound on the injective norm of sums of Gaussian random tensors via the PAC Bayesian lemma (after I.Aden-Ali) (Upper bound on the injective norm of sums of Gaussian random tensors via the PAC Bayesian lemma (after I.Aden-Ali))
We will discuss a recent result of Ishaq Aden-Ali (On the Injective Norm of Sums of Random Tensors and the Moments of Gaussian Chaoses, arXiv:2503.10580) and show how the PAC-Bayesian lemma (a simple consequence of …
27 marca 2025 12:15
Maud Szusterman (Uniwersytet Warszawski)
Revisiting Banaszczyk's 5K-theorem (Revisiting Banaszczyk's 5K-theorem)
Banaszczyk's 5K-theorem is an important result in combinatorics. It states that in any dimension n, given any finite sequences of vectors u_1, ... , u_t taken from the unit ball B_2^n , and given any …
20 marca 2025 12:15
Jacek Jakimiuk
Stability of Khintchine inequalities with optimal constants (Stability of Khintchine inequalities with optimal constants)
We give a strengthening of the classical Khintchine inequality between the second and the $p$-th moment for $p \ge 3$ with optimal constant by adding a deficit depending on the vector of coefficients of the …
6 marca 2025 12:15
Eli Putterman (Tel Aviv University)
Small-ball probabilities for mean widths of random polytopes (Small-ball probabilities for mean widths of random polytopes)
The classical theory of random polytopes addresses questions such as computing the expectation or variance of geometric parameters associated to a random polytope (e.g., volume, number of facets, or mean width); more recent theory also …