Papers

2026
accepted

The extremal point process for branching random walk with stretched exponential displacements

Piotr Dyszewski, Nina Gantert
Annales de l’Institut Henri Poincaré (B) Probabilités et Statistiques

This publication describes extremal particles in branching random walks with stretched exponential displacements via point process convergence and precise large deviations.

Schemat z publikacji
2026
submitted

The largest fragment in self-similar fragmentation processes of positive index

Piotr Dyszewski, Samuel G. G. Johnston, Sandra Palau, Joscha Prochno

This publication sharpens asymptotic results for the largest fragment in self-similar fragmentation processes, proving almost sure convergence with explicit corrections.

Schemat z publikacji
2026
submitted

Markov chains, AR linear models, and regular variation

Piotr Dyszewski, Tamara Mika

This publication studies multivariate regular variation for Markov chains and random linear models, showing how innovations and chain structure determine tail behavior.

Schemat z publikacji
2026
Journal article

Random planar trees and the Jacobian conjecture

Elia Bisi, Piotr Dyszewski, Nina Gantert, Samuel G. G. Johnston, Joscha Prochno, Dominik Schmid
Journal of the London Mathematical Society

This publication develops a probabilistic approach to the Jacobian conjecture using branching processes, tree labellings, and subtree shuffling of Catalan trees.

Schemat z publikacji
2025
Journal article

Branching random walk and log-slowly varying tails

Ayan Bhattacharya, Piotr Dyszewski, Nina Gantert, Zbigniew Palmowski
Latin American Journal of Probability and Mathematical Statistics

This publication studies extremes of branching random walks with heavy-tailed displacements, proving convergence to a clustered Cox process after nonlinear transformation.

Schemat z publikacji
2024
Journal article

Weak quenched limit theorems for a random walk in a sparse random environment

Dariusz Buraczewski, Piotr Dyszewski, Alicja Kołodziejska
Electronic Journal of Probability

This publication studies quenched behavior of random walks with sparse random drifts, showing the absence of strong quenched limit laws under heavy-tailed gaps.

Schemat z publikacji
2023
Journal article

The maximum of a branching walk with stretched exponential tails

Piotr Dyszewski, Nina Gantert, Thomas Höfelsauer
Annales de l’Institut Henri Poincaré (B) Probabilités et Statistiques

This publication analyzes the rightmost particle in branching random walks with stretched exponential step-size tails, proving limit theorems across distinct tail regimes.

Schemat z publikacji
2023
Journal article

Solutions of kinetic-type equations with perturbed collisions

Dariusz Buraczewski, Piotr Dyszewski, Alexander Marynych
Stochastic Processes and their Applications

This publication studies kinetic-type differential equations via smoothing transforms, proving uniqueness and describing asymptotics through branching random walks

Schemat z publikacji
2022
Journal article

Precise large deviation estimates for branching process in random environment

Dariusz Buraczewski, Piotr Dyszewski
Annales de l’Institut Henri Poincaré Probabilités et Statistiques

This publication derives precise upper large-deviation asymptotics for branching processes in random environments, including first-passage estimates in the subcritical case.

Schemat z publikacji
2022
Journal article

Sharp concentration for the largest and smallest fragment in a k-regular self-similar fragmentation

Piotr Dyszewski, Nina Gantert, Samuel G. G. Johnston, Joscha Prochno, Dominik Schmid
The Annals of Probability

This publication studies asymptotics of k-regular self-similar fragmentations, including extremal fragment sizes and Gumbel limits for extinction times.

Schemat z publikacji
2020
Journal article

Homogeneous mappings of regularly varying vectors

Piotr Dyszewski, Thomas Mikosch
The Annals of Applied Probability

This publication gives sharp conditions for regular variation of product-type functions of random vectors, with applications to random matrices and affine stochastic recursions.

Schemat z publikacji
2020
Journal article

Large deviations for the maximum of a branching random walk with stretched exponential tails

Piotr Dyszewski, Nina Gantert, Thomas Höfelsauer
Electronic Communications in Probability

This publication establishes large deviation principles for the rightmost particle in branching random walks with stretched exponential step-size tails.

Schemat z publikacji
2020
Journal article

Random walks in a strongly sparse random environment

Dariusz Buraczewski, Piotr Dyszewski, Alexander Iksanov, Alexander Marynych
Stochastic Processes and their Applications

This publication proves limit theorems for random walks in strongly sparse random environments, showing diffusive or subdiffusive scaling with non-stable limits.

Schemat z publikacji
2019
Journal article

Random walks in a moderately sparse random environment

Dariusz Buraczewski, Piotr Dyszewski, Alexander Iksanov, Alexander Marynych, Alexander Roitershtein
Electronic Journal of Probability

This publication proves stable limit laws for random walks in sparse random environments under moderate sparsity assumptions.

Schemat z publikacji
2019
Journal article

Local fluctuations of critical Mandelbrot cascades

Dariusz Buraczewski, Piotr Dyszewski, Konrad Kolesko
Annales de l’Institut Henri Poincaré (B) Probabilités et Statistiques

This publication studies fluctuations of limiting measures in critical Mandelbrot cascades, providing optimal estimates for their local behavior.

Schemat z publikacji
2018
Journal article

Precise large deviations for random walk in random environment

Dariusz Buraczewski, Piotr Dyszewski
Electronic Journal of Probability

This publication establishes sharp large-deviation estimates for one-dimensional random walks in random environments, including precise slowdown probabilities in the sub-ballistic regime.

Schemat z publikacji
2018
Journal article

Iterated random functions and regularly varying tails

Ewa Damek, Piotr Dyszewski
Journal of Difference Equations and Applications

This paper studies tail estimates for stochastic fixed point equations driven by random Lipschitz functions, with new results for random difference equations.

Schemat z publikacji
2018
Journal article

On perpetuities with gamma-like tails

Dariusz Buraczewski, Piotr Dyszewski, Aleksander Iksanov, Aleksander Marynych
Journal of Applied Probability

This publication gives conditions for precise right-tail asymptotics of perpetuities and criteria for finiteness of their one-sided exponential moments.

Schemat z publikacji
2017
Journal article

Thin tails of fixed points of the nonhomogeneous smoothing transform

Piotr Dyszewski, Gerold Alsmeyer
Stochastic Processes and their Applications

This publication studies Poissonian tails of canonical fixed points of the smoothing transform, with an application to the right tail of the Quicksort distribution.

Schemat z publikacji
2016
Journal article

Iterated random functions and slowly varying tails

Piotr Dyszewski
Stochastic Processes and their Applications

This publication studies tail asymptotics for stationary distributions of Markov chains generated by random Lipschitz functions, with new results for random difference equations under subexponential assumptions.

Schemat z publikacji
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