### Abstract

We establish existence, uniqueness and higher order weighted L_{p}-Sobolev regularity for the stochastic heat equation with zero Dirichlet boundary condition on angular domains and on polygonal domains in R^{2}. We use a system of mixed weights consisting of appropriate powers of the distance to the vertexes and of the distance to the boundary to measure the regularity with respect to the space variable. In this way we can capture the influence of both main sources for singularities: the incompatibility between noise and boundary condition on the one hand and the singularities of the boundary on the other hand. The range of admissible powers of the distance to the vertexes is described in terms of the maximal interior angle and is sharp.

Original language | English |
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Journal | Journal of Differential Equations |

DOIs | |

Publication status | Published - 2019 Jan 1 |

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### Keywords

- Angular domain
- Corner singularity
- Polygonal domain
- Stochastic heat equation
- Stochastic partial differential equation
- Weighted L-estimate

### ASJC Scopus subject areas

- Analysis
- Applied Mathematics

### Cite this

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*Journal of Differential Equations*. https://doi.org/10.1016/j.jde.2019.06.027