A Muitigrid for Nonconforming FE-Discretisatisations with Application to Non-Matching Grids

摘要

Nonconforming finite element discretisations require special care in the construction of the rolongation and restrictionin the multigrid process. In this paper, a general scheme is proposed, which guarantees the approximation property. As an example, the technique is applied to the discretisation by non-matching grids (mortar elements).