Strong well-posedness for cyclic catalytic reaction--diffusion SPDEs with mutation and immigration
Abstract
We study cyclic catalytic stochastic reaction-diffusion systems with mutation and immigration. The equations have square-root catalytic coefficients and spatially colored noise. Under a condition requiring the cyclic inward drift to dominate the corresponding noise covariance, we establish global strong well-posedness for nonnegative initial states. Our approach combines positivity-preserving approximations, uniform energy estimates, and a concave power entropy that controls the occupation of states near zero. These boundary estimates allow us to derive a Hellinger stability inequality for two synchronized weak variational solutions, yielding pathwise uniqueness directly in this solution class. We then use joint compactness of the approximating solutions and their driving noise, together with martingale identification and the Gyongy-Krylov criterion, to construct a probabilistically strong solution on the prescribed Wiener space.
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BibTeX
@misc{xiong2026strong,
title = {{Strong well-posedness for cyclic catalytic reaction--diffusion SPDEs with mutation and immigration}},
author = {Jie Xiong and Wen Xu},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.41400},
eprint = {2610.41400},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.41400},
note = {CC BY-SA 4.0},
}
RIS
TY - UNPB
TI - Strong well-posedness for cyclic catalytic reaction--diffusion SPDEs with mutation and immigration
AU - Jie Xiong
AU - Wen Xu
PY - 2026
DA - 2026/10/30
PB - arXiv
DO - 10.48550/arxiv.2610.41400
UR - https://arxiv.org/abs/2610.41400
AB - We study cyclic catalytic stochastic reaction-diffusion systems with mutation and immigration. The equations have square-root catalytic coefficients and spatially colored noise. Under a condition requiring the cyclic inward drift to dominate the corresponding noise covariance, we establish global strong well-posedness for nonnegative initial states. Our approach combines positivity-preserving approximations, uniform energy estimates, and a concave power entropy that controls the occupation of states near zero. These boundary estimates allow us to derive a Hellinger stability inequality for two synchronized weak variational solutions, yielding pathwise uniqueness directly in this solution class. We then use joint compactness of the approximating solutions and their driving noise, together with martingale identification and the Gyongy-Krylov criterion, to construct a probabilistically strong solution on the prescribed Wiener space.
ER -