A classification of symmetric double saddle-point systems into block-arrow and block-tridiagonal matrix forms is presented, including invertibility conditions, spectral properties, and block preconditioners.
Scalable algo- rithms for three-field mixed finite element coupled poromechanics.Journal of Computational Physics, 327:894–918
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Classification of Double Saddle-Point Systems
A classification of symmetric double saddle-point systems into block-arrow and block-tridiagonal matrix forms is presented, including invertibility conditions, spectral properties, and block preconditioners.