A Generalized Multigrid Method for Solving Contact Problems in Lagrange Multiplier based Unfitted Finite Element Method

@article{Kothari2022AGM,
  title={A Generalized Multigrid Method for Solving Contact Problems in Lagrange Multiplier based Unfitted Finite Element Method},
  author={Hardik Kothari and Rolf H. Krause},
  journal={ArXiv},
  year={2022},
  volume={abs/2106.16107}
}

Stability and conditioning of immersed finite element methods: analysis and remedies

TLDR
This review paper discusses the developments in immersed or unfitted finite element methods over the past decade, and provides a detailed explanation of Schwarz preconditioning, element aggregation, and the ghost penalty formulation.

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