Local coarsening of simplicial finite element meshes generated by bisections

@article{Bartels2012LocalCO,
  title={Local coarsening of simplicial finite element meshes generated by bisections},
  author={S{\"o}ren Bartels and Patrick Schreier},
  journal={BIT Numerical Mathematics},
  year={2012},
  volume={52},
  pages={559-569}
}
A simple criterion that allows the efficient local coarsening of simplicial finite element meshes generated by bisections is devised and analyzed. Under a mild condition on the initial triangulation the proposed criterion allows to gradually reverse the entire refinement without employing its history explicitly. Numerical experiments underline the efficiency of the resulting algorithm.