Note on A. Barbour's paper on Stein's method for diffusion approximations

作者：Kasprzak Mikolaj J^*; Duncan Andrew B; Vollmer Sebastian J

来源：Electronic Communications in Probability, 2017, 22(0).

DOI：10.1214/17-ECP54

• Stein's method
• Donsker's theorem
• diffusion approximations

In [2] foundations for diffusion approximation via Stein's method are laid. This paper has been cited more than 130 times and is a cornerstone in the area of Stein's method (see, for example, its use in [1] or [7]). A semigroup argument is used in [2] to solve a Stein equation for Gaussian diffusion approximation. We prove that, contrary to the claim in [2], the semigroup considered therein is not strongly continuous on the Banach space of continuous, real-valued functions on D[0,1] growing slower than a cubic, equipped with an appropriate norm. We also provide a proof of the exact formulation of the solution to the Stein equation of interest, which does not require the aforementioned strong continuity. This shows that the main results of [2] hold true.

• 出版日期2017