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Approximate inverse techniques for block-partitioned matrices. (English) Zbl 0888.65035
Preconditioning options are proposed for system matrices in block-partitioned form. This form has many applications. For example, the incompressible Navier-Stokes equations may be mentioned as such example. Approximate inverse techniques are used to generate sparse approximate solutions. The storage requirements for these preconditioners may be much less than for incomplete LU factorization preconditioners.
MSC:
65F10Iterative methods for linear systems
76D05Navier-Stokes equations (fluid dynamics)
65F50Sparse matrices (numerical linear algebra)
65F35Matrix norms, conditioning, scaling (numerical linear algebra)
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