Comparison Principles for Stochastic Volterra equations
In this work, we establish a comparison principle for stochastic Volterra equations with
respect to the initial condition and the drift $ b $ applicable to a wide class of Volterra kernels …
respect to the initial condition and the drift $ b $ applicable to a wide class of Volterra kernels …
On the anisotropic stable JCIR process
M Friesen, P ** - arxiv preprint arxiv:1908.05473, 2019 - arxiv.org
We investigate the anisotropic stable JCIR process which is a multi-dimensional extension
of the stable JCIR process but also a multi-dimensional analogue of the classical JCIR …
of the stable JCIR process but also a multi-dimensional analogue of the classical JCIR …
[HTML][HTML] Existence of densities for multi-type continuous-state branching processes with immigration
M Friesen, P **, B Rüdiger - Stochastic Processes and their Applications, 2020 - Elsevier
Let X be a multi-type continuous-state branching process with immigration on state space
R+ d. Denote by gt, t≥ 0, the law of X (t). We provide sufficient conditions under which gt …
R+ d. Denote by gt, t≥ 0, the law of X (t). We provide sufficient conditions under which gt …
Diffusion approximations for self-excited systems with applications to general branching processes
W Xu - The Annals of Applied Probability, 2024 - projecteuclid.org
In this work, several convergence results are established for nearly critical self-excited
systems in which event arrivals are described by multivariate marked Hawkes point …
systems in which event arrivals are described by multivariate marked Hawkes point …
Distributional properties of jumps of multi-type CBI processes
We study the distributional properties of jumps of multi-type continuous state and continuous
time branching processes with immigration (multi-type CBI processes). We derive an …
time branching processes with immigration (multi-type CBI processes). We derive an …
[PDF][PDF] Exponential ergodicity for stochastic equations of nonnegative processes with jumps
M Friesen, P **, J Kremer, B Rüdiger - ALEA Lat. Am. J. Probab. Math …, 2023 - alea.impa.br
We study the long-time behavior for continuous-time Markov processes on the state space
R≥ 0:=[0,∞), which arise as unique strong solutions to stochastic equations with jumps. We …
R≥ 0:=[0,∞), which arise as unique strong solutions to stochastic equations with jumps. We …
Interacting particle systems with continuous spins
We study a general class of interacting particle systems over a countable state space $ V $
where on each site $ x\in V $ the particle mass $\eta (x)\geq 0$ follows a stochastic …
where on each site $ x\in V $ the particle mass $\eta (x)\geq 0$ follows a stochastic …
Diffusion approximations for marked self-exciting systems with applications to general branching processes
W Xu - arxiv preprint arxiv:2101.01288, 2021 - arxiv.org
We study in this work the convergence of a sequence of asymptotically critical self-exciting
systems. In these systems, we use multivariate marked Hawkes point processes to describe …
systems. In these systems, we use multivariate marked Hawkes point processes to describe …