root / synthbench / euroben-dm / mod2ci / pcoefs.f @ 0:839f52ef7657
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Subroutine pcoefs( m, gamma ) |
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! ---------------------------------------------------------------------- |
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! --- Routine 'pcoefs' provides the polynomial coefficients for a |
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! left polynomial preconditioner to a degree <= 12. |
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! Integer m : degree of polynomial. |
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! Real(l_) gamma(m+1) : Array of polynomial coefficients. |
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! ---------------------------------------------------------------------- |
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Use numerics |
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Implicit None |
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|
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Integer :: m |
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Real(l_) :: gamma(m+1) |
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! ---------------------------------------------------------------------- |
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If ( m == 1 ) Then |
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gamma(1) = 6.0_l_/5.0_l_ |
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gamma(2) = 4.0_l_/5.0_l_ |
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Else If ( m == 2 ) Then |
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gamma(1) = 8.0_l_/7.0_l_ |
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gamma(2) = 12.0_l_/7.0_l_ |
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gamma(3) = 8.0_l_/7.0_l_ |
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Else If ( m == 3 ) Then |
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gamma(1) = 8.0_l_/9.0_l_ |
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gamma(2) = 4.0_l_/3.0_l_ |
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gamma(3) = 8.0_l_/3.0_l_ |
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gamma(4) = 16.0_l_/9.0_l_ |
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Else If ( m == 4 ) Then |
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gamma(1) = 10.0_l_/11.0_l_ |
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gamma(2) = 4.0_l_/11.0_l_ |
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gamma(3) = 16.0_l_/11.0_l_ |
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gamma(4) = 48.0_l_/11.0_l_ |
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gamma(5) = 32.0_l_/11.0_l_ |
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Else If ( m == 5 ) Then |
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gamma(1) = 14.0_l_/13.0_l_ |
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gamma(2) = 8.0_l_/13.0_l_ |
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gamma(3) = -16.0_l_/13.0_l_ |
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gamma(4) = 16.0_l_/13.0_l_ |
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gamma(5) = 96.0_l_/13.0_l_ |
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gamma(6) = 64.0_l_/13.0_l_ |
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Else If ( m == 6 ) Then |
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gamma(1) = 16.0_l_/15.0_l_ |
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gamma(2) = 8.0_l_/5.0_l_ |
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gamma(3) = 0.0_l_ |
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gamma(4) = -16.0_l_/3.0_l_ |
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gamma(5) = 0.0_l_ |
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gamma(6) = 64.0_l_/5.0_l_ |
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gamma(7) = 128.0_l_/15.0_l_ |
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Else If ( m == 7 ) Then |
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gamma(1) = 16.0_l_/17.0_l_ |
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gamma(2) = 24.0_l_/17.0_l_ |
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gamma(3) = 64.0_l_/17.0_l_ |
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gamma(4) = -16.0_l_/17.0_l_ |
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gamma(5) = -256.0_l_/17.0_l_ |
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gamma(6) = -64.0_l_/17.0_l_ |
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gamma(7) = 384.0_l_/17.0_l_ |
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gamma(8) = 256.0_l_/17.0_l_ |
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Else If ( m == 8 ) Then |
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gamma(1) = 18.0_l_/19.0_l_ |
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gamma(2) = 8.0_l_/19.0_l_ |
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gamma(3) = 48.0_l_/19.0_l_ |
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gamma(4) = 208.0_l_/19.0_l_ |
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gamma(5) = -32.0_l_/19.0_l_ |
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gamma(6) = -704.0_l_/19.0_l_ |
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gamma(7) = -256.0_l_/19.0_l_ |
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gamma(8) = 768.0_l_/19.0_l_ |
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gamma(9) = 512.0_l_/19.0_l_ |
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Else If ( m == 9 ) Then |
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gamma(1) = 22.0_l_/21.0_l_ |
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gamma(2) = 4.0_l_/7.0_l_ |
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gamma(3) = -16.0_l_/7.0_l_ |
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gamma(4) = 16.0_l_/3.0_l_ |
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gamma(5) = 32.0_l_ |
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gamma(6) = 0.0_l_ |
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gamma(7) = -256.0_l_/3.0_l_ |
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gamma(8) = -256.0_l_/7.0_l_ |
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gamma(9) = 512.0_l_/7.0_l_ |
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gamma(10) = 1024.0_l_/21.0_l_ |
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Else If ( m == 10 ) Then |
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gamma(1) = 24.0_l_/23.0_l_ |
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gamma(2) = 36.0_l_/23.0_l_ |
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gamma(3) = -24.0_l_/23.0_l_ |
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gamma(4) = -304.0_l_/23.0_l_ |
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gamma(5) = 256.0_l_/23.0_l_ |
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gamma(6) = 2048.0_l_/23.0_l_ |
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gamma(7) = 256.0_l_/23.0_l_ |
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gamma(8) = -4352.0_l_/23.0_l_ |
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gamma(9) = -2048.0_l_/23.0_l_ |
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gamma(10) = 3072.0_l_/23.0_l_ |
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gamma(11) = 2048.0_l_/23.0_l_ |
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Else If ( m == 11 ) Then |
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gamma(1) = 24.0_l_/25.0_l_ |
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gamma(2) = 36.0_l_/25.0_l_ |
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gamma(3) = 24.0_l_/5.0_l_ |
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gamma(4) = -32.0_l_/5.0_l_ |
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gamma(5) = -256.0_l_/5.0_l_ |
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gamma(6) = 512.0_l_/25.0_l_ |
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gamma(7) = 5888.0_l_/25.0_l_ |
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gamma(8) = 256.0_l_/5.0_l_ |
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gamma(9) = -2048.0_l_/5.0_l_ |
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gamma(10) = -1024.0_l_/5.0_l_ |
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gamma(11) = 6144.0_l_/25.0_l_ |
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gamma(12) = 4096.0_l_/25.0_l_ |
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Else If ( m == 12 ) Then |
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gamma(1) = 26.0_l_/27.0_l_ |
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gamma(2) = 4.0_l_/9.0_l_ |
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gamma(3) = 32.0_l_/9.0_l_ |
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gamma(4) = 544.0_l_/27.0_l_ |
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gamma(5) = -64.0_l_/3.0_l_ |
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gamma(6) = -512.0_l_/3.0_l_ |
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gamma(7) = 256.0_l_/9.0_l_ |
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gamma(8) = 1792.0_l_/3.0_l_ |
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gamma(9) = 512.0_l_/3.0_l_ |
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gamma(10) = -23552.0_l_/27.0_l_ |
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gamma(11) = -4096.0_l_/9.0_l_ |
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gamma(12) = 4096.0_l_/9.0_l_ |
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gamma(13) = 8192.0_l_/27.0_l_ |
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End If |
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! ---------------------------------------------------------------------- |
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End Subroutine pcoefs |