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Interior energy error estimates for the weak Galerkin finite element method.
LI, Hengguang - Personal Name
MU, Lin - Personal Name
YE, Xiu - Personal Name
Consider the Poisson equation in a polytopal domain ⊂ Rd (d = 2, 3) as the model problem. We study interior energy error estimates for the weak Galerkin finite element approximation to elliptic boundary value problems. In particular, we show that the interior error in the energy norm is bounded by three components: the best local approximation error, the error in negative norms, and the trace error on the element boundaries. This implies that the interior convergence rate can be polluted by solution singularities on the domain boundary, even when the solution is smooth in the interior region. Numerical results are reported to support the theoretical findings.
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| EB00000003722K | Available |
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Hengguang Li, Lin Mu, · Xiu Ye
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