Abstract
We utilize the weak convergence method to establish the Freidlin–Wentzell large deviations principle (LDP) for stochastic delay differential equations (SDDEs) with super-linearly growing coefficients, which covers a large class of cases with non-globally Lipschitz coefficients. The key ingredient in our proof is the uniform moment estimate of the controlled equation, where we handle the super-linear growth of the coefficients by an iterative argument. Our results allow both the drift and diffusion coefficients of the considered equations to super-linearly grow not only with respect to the delay variable but also to the state variable. This work extends the existing results which develop the LDPs for SDDEs with super-linearly growing coefficients only with respect to the delay variable.
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Acknowledgements
The authors would like to thank the editors for their help and the referees for their constructive and insightful comments. This work was supported by National Natural Science Foundation of China (Nos. 12201228, 12201552, 12031020, 11971470, 11971488), the National key R&D Program of China (No. 2020YFA0713701), the Fundamental Research Funds for the Central Universities (No. 3004011142), Yunnan Fundamental Research Projects (No. 202301AU070010) and Innovation Team of School of Mathematics and Statistics of Yunnan University (No. ST20210104).
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**, D., Chen, Z. & Zhou, T. Large Deviations Principle for Stochastic Delay Differential Equations with Super-linearly Growing Coefficients. Front. Math (2024). https://doi.org/10.1007/s11464-023-0072-3
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DOI: https://doi.org/10.1007/s11464-023-0072-3
Keywords
- Large deviations principle
- stochastic delay differential equations
- super-linear growth
- weak convergence method