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54 lines
1.4 KiB
Fortran
54 lines
1.4 KiB
Fortran
module amg_s_pde2d_base_mod
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use psb_base_mod, only : psb_spk_, szero, sone
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real(psb_spk_), save, private :: epsilon=sone/80
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contains
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subroutine pde_set_parm(dat)
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real(psb_spk_), intent(in) :: dat
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epsilon = dat
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end subroutine pde_set_parm
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!
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! functions parametrizing the differential equation
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!
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function b1(x,y)
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use psb_base_mod, only : psb_spk_, szero, sone
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real(psb_spk_) :: b1
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real(psb_spk_), intent(in) :: x,y
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b1 = szero/1.414_psb_spk_
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end function b1
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function b2(x,y)
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use psb_base_mod, only : psb_spk_, szero, sone
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real(psb_spk_) :: b2
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real(psb_spk_), intent(in) :: x,y
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b2 = szero/1.414_psb_spk_
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end function b2
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function c(x,y)
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use psb_base_mod, only : psb_spk_, szero, sone
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real(psb_spk_) :: c
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real(psb_spk_), intent(in) :: x,y
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c = szero
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end function c
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function a1(x,y)
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use psb_base_mod, only : psb_spk_, szero, sone
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real(psb_spk_) :: a1
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real(psb_spk_), intent(in) :: x,y
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a1=sone*epsilon
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end function a1
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function a2(x,y)
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use psb_base_mod, only : psb_spk_, szero, sone
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real(psb_spk_) :: a2
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real(psb_spk_), intent(in) :: x,y
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a2=sone*epsilon
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end function a2
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function g(x,y)
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use psb_base_mod, only : psb_spk_, szero, sone
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real(psb_spk_) :: g
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real(psb_spk_), intent(in) :: x,y
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g = szero
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if (x == sone) then
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g = sone
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else if (x == szero) then
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g = sone
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end if
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end function g
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end module amg_s_pde2d_base_mod
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