文摘
For any domain \({\Omega \subset \mathbb{R}^{p}}\) , we denote by u the solution of the Dirichlet Problem with data f at the boundary. Similarly, we denote by u d the solution that satisfies the average property on a discrete grid and the same boundary data. We give optimal estimates for the difference \({\|u-u_{d}\|_{\infty}}\) .