
arXiv: 2212.01720
Virtual element methods (VEMs) without extrinsic stabilization in arbitrary degree of polynomial are developed for second order elliptic problems, including a nonconforming VEM and a conforming VEM in arbitrary dimension. The key is to construct local $H(\textrm{div})$-conforming macro finite element spaces such that the associated $L^2$ projection of the gradient of virtual element functions is computable, and the $L^2$ projector has a uniform lower bound on the gradient of virtual element function spaces in $L^2$ norm. Optimal error estimates are derived for these VEMs. Numerical experiments are provided to test the VEMs without extrinsic stabilization.
26 pages, 8 figures
Error bounds for boundary value problems involving PDEs, norm equivalence, Numerical Analysis (math.NA), Finite element, Rayleigh-Ritz and Galerkin methods for boundary value problems involving PDEs, Stability and convergence of numerical methods for boundary value problems involving PDEs, Numerical solution of discretized equations for boundary value problems involving PDEs, stabilization, Second-order elliptic equations, 65N12, 65N22, 65N30, macro finite element, FOS: Mathematics, Mathematics - Numerical Analysis, virtual element, error analysis
Error bounds for boundary value problems involving PDEs, norm equivalence, Numerical Analysis (math.NA), Finite element, Rayleigh-Ritz and Galerkin methods for boundary value problems involving PDEs, Stability and convergence of numerical methods for boundary value problems involving PDEs, Numerical solution of discretized equations for boundary value problems involving PDEs, stabilization, Second-order elliptic equations, 65N12, 65N22, 65N30, macro finite element, FOS: Mathematics, Mathematics - Numerical Analysis, virtual element, error analysis
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