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The MixedRiemannianPNSolver can assemble when different finite element spaces are used for deformations and rotations (in, e.g., a Cosserat model). CHOLMOD is used for the inner solver. This can be much faster than the MixedRiemannianTRSolver.
The MixedRiemannianPNSolver can assemble when different finite element spaces are used for deformations and rotations (in, e.g., a Cosserat model). CHOLMOD is used for the inner solver. This can be much faster than the MixedRiemannianTRSolver.