English

$L_p$-regularity theory for the stochastic reaction-diffusion equation with super-linear multiplicative noise and strong dissipativity

Probability 2023-04-25 v1

Abstract

We study the existence, uniqueness, and regularity of the solution to the stochastic reaction-diffusion equation (SRDE) with colored noise F˙\dot{F}: tu=aijuxixj+biuxi+cubˉu1+β+ξu1+γF˙,(t,x)R+×Rd;u(0,)=u0, \partial_t u = a^{ij}u_{x^ix^j} + b^i u_{x^i} + cu - \bar{b} u^{1+\beta} + \xi u^{1+\gamma}\dot F,\quad (t,x)\in \mathbb{R}_+\times\mathbb{R}^d; \quad u(0,\cdot) = u_0, where aij,bi,c,bˉa^{ij},b^i,c, \bar{b} and ξ\xi are C2C^2 or LL_\infty bounded random coefficients. Here β>0\beta>0 denotes the degree of the strong dissipativity and γ>0\gamma>0 represents the degree of stochastic force. Under the reinforced Dalang's condition on F˙\dot{F}, we show the well-posedness of the SRDE provided γ<κ(β+1)d+2\gamma < \frac{\kappa(\beta +1)}{d+2} where κ>0\kappa>0 is the constant related to F˙\dot F. Our result assures that strong dissipativity prevents the solution from blowing up. Moreover, we provide the maximal H\"older regularity of the solution in time and space.

Keywords

Cite

@article{arxiv.2304.11879,
  title  = {$L_p$-regularity theory for the stochastic reaction-diffusion equation with super-linear multiplicative noise and strong dissipativity},
  author = {Beom-Seok Han and Jaeyun Yi},
  journal= {arXiv preprint arXiv:2304.11879},
  year   = {2023}
}

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21 pages