Three preconditioners for H(div) interior penalty DG are constructed and analyzed, with provably h-, p-, and eta-robust conditioning on affine and Cartesian meshes.
Algebraic multigrid schemes for hig h-order nodal discontinuous Galerkin methods
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Subspace and auxiliary space preconditioners for high-order interior penalty discretizations in $H(\mathrm{div})$
Three preconditioners for H(div) interior penalty DG are constructed and analyzed, with provably h-, p-, and eta-robust conditioning on affine and Cartesian meshes.