In this paper, we study an a posteriori error indicator introduced in E. Dari, R.G. Durán, and C. Padra, Appl. Numer. Math., 2012, for the approximation of the Laplace eigenvalue problem with Crouzeix–Raviart nonconforming finite elements. In particular, we show that the estimator is robust also in presence of eigenvalues of multiplicity greater than one. Some numerical examples confirm the theory and illustrate the convergence of an adaptive algorithm when dealing with multiple eigenvalues. Copyright © 2015 John Wiley & Sons, Ltd.
|Original language||English (US)|
|Title of host publication||Mathematical Methods in the Applied Sciences|
|Publisher||John Wiley and Sons LtdSouthern GateChichester, West SussexPO19 8SQ|
|Number of pages||20|
|State||Published - Jan 30 2017|