Shi, Zhongci A remark on the optimal order of convergence of Wilson’s nonconforming element. (Chinese. English summary) Zbl 0607.65071 Math. Numer. Sin. 8, 159-163 (1986). It is proved that the optimal order of convergence of Wilson’s nonconforming element in the energy norm is O(h). Cited in 28 Documents MSC: 65N30 Finite element, Rayleigh-Ritz and Galerkin methods for boundary value problems involving PDEs 65N15 Error bounds for boundary value problems involving PDEs 35J05 Laplace operator, Helmholtz equation (reduced wave equation), Poisson equation Keywords:Poisson equation; finite elements; optimal order of convergence; Wilson’s nonconforming element PDFBibTeX XMLCite \textit{Z. Shi}, Math. Numer. Sin. 8, 159--163 (1986; Zbl 0607.65071)