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Asymptotically unbiased approximation of the QSD of diffusion processes with a decreasing time step Euler scheme

Fabien Panloup & Julien Reygner

Annals of Applied Probability2026https://doi.org/10.1214/25-aap2259preprint
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0.50

What the paper says

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.

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https://doi.org/https://doi.org/10.1214/25-aap2259

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@article{fabien2026,
  title        = {{Asymptotically unbiased approximation of the QSD of diffusion processes with a decreasing time step Euler scheme}},
  author       = {Fabien Panloup & Julien Reygner},
  journal      = {Annals of Applied Probability},
  year         = {2026},
  doi          = {https://doi.org/https://doi.org/10.1214/25-aap2259},
}

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Asymptotically unbiased approximation of the QSD of diffusion processes with a decreasing time step Euler scheme

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Balanced mode · F 0.40 / M 0.15 / V 0.05 / R 0.40

F · citation impact0.50 × 0.4 = 0.20
M · momentum0.50 × 0.15 = 0.07
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R · text relevance †0.50 × 0.4 = 0.20

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