Volume 53, Number 3, May-June 2019
|Page(s)||749 - 774|
|Published online||05 June 2019|
The nonconforming Virtual Element Method for eigenvalue problems
Dipartimento di Matematica F. Casorati, Università di Pavia, Via Ferrata, 5 – 27100 Pavia, Italy
2 Group T-5, Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA
3 Dipartimento di Matematica e Applicazioni, Università degli Studi di Milano Bicocca, Via R. Cozzi, 55 – 20125 Milano, Italy
* Corresponding author: email@example.com
Accepted: 29 November 2018
We analyse the nonconforming Virtual Element Method (VEM) for the approximation of elliptic eigenvalue problems. The nonconforming VEM allows to treat in the same formulation the two- and three-dimensional case. We present two possible formulations of the discrete problem, derived respectively by the nonstabilized and stabilized approximation of the L2-inner product, and we study the convergence properties of the corresponding discrete eigenvalue problem. The proposed schemes provide a correct approximation of the spectrum, in particular we prove optimal-order error estimates for the eigenfunctions and the usual double order of convergence of the eigenvalues. Finally we show a large set of numerical tests supporting the theoretical results, including a comparison with the conforming Virtual Element choice.
Mathematics Subject Classification: 65N30 / 65N25
Key words: Nonconforming virtual element / eigenvalue problem / polygonal meshes
© EDP Sciences, SMAI 2019
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