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SSOR gauge (the default) to perform an ordinary SSOR iteration followed by divergence cleaning.
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SOR gauge to perform an ordinary SOR iteration followed by divergence cleaning.
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SORU gauge to perform an ordinary SORU iteration followed by divergence cleaning.
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If used with a Coarse Solver, select a Termination technique. These are described for the SCGS attribute under Settings When Used With a Coarse Solver.
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If a Coarse Solver is not used, enter the Number of iterations to specify a fixed number of iterations to perform when this attribute is used as a preconditioner or smoother (default: 2). In addition to the initial divergence cleaning, the method performs a number of cleaning iterations in each linear solver iteration. Control the number of such divergence cleaning iterations in the Number of secondary iterations field.
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