Wasamon Jantai

My research interests lie in probability theory, distributional approximation, and Stein’s method. I am particularly interested in developing probabilistic approximation techniques and applying them to both theoretical and practical problems.

My current research includes normal and Poisson approximation, approximate zero-bias transformations, random sums, random walks, and applications of Stein’s method.

Research Interests

• Stein’s Method

• Distributional Approximation

• Probability Theory

• Stochastic Processes

• Normal and Poisson Approximation

• Random Sums

• Random Walks

  Research Collaboration

  I am happy to discuss potential research collaborations in probability, Stein’s method, distributional approximation, stochastic processes, and related areas. Please feel free to contact me by email.

1. Jantai W. and Wiroonsri N., An approximate zero bias transformation for random sums: Applications to sampling with outliers, auto insurance, and generative AI, arXiv preprint arXiv:2608.27143, 2026.

2. Kooakachai M.,  Gaengaew P., and Jantai W., Proving one-dimensional convergence of trinomial random walks conditioned on end points via Stein's method, AIP Conference Proceedings,  3444, 050005, 2026. https://doi.org/10.1063/5.0327609.

3. Yonghint N. and Jantai W. Poisson approximation for stop-loss metrics of order 1 and 2. Sankhya A 87, (2025): 302–326. https://doi.org/10.1007/s13171-025-00399-5.
4. Jantai W. and Wiroonsri N. On combinatorial central limit theorems with different underlying permutations via approximate zero biasing. Sankhya A 87, (2025): 261–301. https://doi.org/10.1007/s13171-025-00408-7.
5. Hommai Y., Kooakachai M. and Jantai W. Some properties of two-dimensional trinomial random walks conditioned on end points: Annual Meeting in Mathematics 2024. Thai Journal of Mathematics 23(1), (2025): 111–128.
6. Kabbun N., Jantai W., Than D. and Kooakachai M. Stochastic models for breaking large bills and coins: Annual Meeting in Mathematics 2024. Thai Journal of Mathematics 23(1), (2025): 57–71.
7. Gaengaew P., Jantai W. and Kooakachai M. Some properties of a trinomial random walk conditioned on end points: Annual Meeting in Mathematics 2023. Thai Journal of Mathematics 22(1), (2024): 203–216.
8. B. Barbosa, W. Jantai, Y. Kovchegov and G. Xu, Proving Newman’s CLT via Stein’s Method, Technical report, (2021).
9. W. Jantai and S. Sumetkijakan, Generalizations of the Schweizer-Wolff Measure of Dependence, Thai Journal of Mathematics (special issue on ICMSA 2015), (2016) 89-100.
10. W. Jantai, On the Length of a Shortest Spanning Walk, KKU Science Journal, 41(1)(2013), 112–120.