Asymptotically unbiased approximation of the QSD of diffusion processes with a decreasing time step Euler scheme
Abstract
We build and study a recursive algorithm based on the occupation measure of an Euler scheme with decreasing step for the numerical approximation of the quasistationary distribution (QSD) of an elliptic diffusion in a bounded domain. We prove the almost sure convergence of the procedure for a family of redistributions and show that we can also recover the approximation of the rate of survival and the convergence in distribution of the algorithm. This last point follows from some new bounds on the weak error related to diffusion dynamics with renewal.
Fields of Study & Subjects
Advanced Thermodynamics and Statistical Mechanics
Advanced Mathematical Modeling in Engineering
Spectral Theory in Mathematical Physics
Publication details
- Journal / source
- The Annals of Applied Probability
- Publisher
- Institute of Mathematical Statistics
- Volume
- 36
- Issue
- 2
- Pages
- 1377-1415
- Publication date
- 1 April 2026
- Language
- EN