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Add smoothing based on Chebyshev polynomials of the fourth kind #856

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Add smoothing based on Chebyshev polynomials of the fourth kind #856

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5 changes: 5 additions & 0 deletions src/parcsr_ls/HYPRE_parcsr_ls.h
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Expand Up @@ -886,6 +886,11 @@ HYPRE_Int HYPRE_BoomerAMGSetChebyScale (HYPRE_Solver solver,
/**
* (Optional) Defines which polynomial variant should be used.
* The default is 0 (i.e., scaled).
* If variant=1, the polynomial is defined as:
* T(t)* f(t) where f(t) = (1-b/t)
* If variant=2, use standard Chebyshev polynomial with $D^{-1}A$, not $D^{-1/2}AD^{-1/2}$.
* If variant=3, use 4th-kind Chebyshev polynomial from https://arxiv.org/abs/2202.08830.
* If variant=4, use optimized 4th-kind Chebyshev polynomial from https://arxiv.org/abs/2202.08830.
**/
HYPRE_Int HYPRE_BoomerAMGSetChebyVariant (HYPRE_Solver solver,
HYPRE_Int variant);
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