You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
42 lines
1.3 KiB
Fortran
42 lines
1.3 KiB
Fortran
module psb_d_genmat_mod
|
|
use psb_base_mod
|
|
interface
|
|
function d_func_3d(x,y,z) result(val)
|
|
import :: psb_dpk_
|
|
real(psb_dpk_), intent(in) :: x,y,z
|
|
real(psb_dpk_) :: val
|
|
end function d_func_3d
|
|
end interface
|
|
|
|
interface
|
|
subroutine gen_prob3d(ictxt,idim,a,bv,xv,desc_a,afmt,a1,a2,a3,b1,b2,b3,c,g,info)
|
|
!
|
|
! Discretizes the partial differential equation
|
|
!
|
|
! a1 dd(u) a2 dd(u) a3 dd(u) b1 d(u) b2 d(u) b3 d(u)
|
|
! - ------ - ------ - ------ + ----- + ------ + ------ + c u = 0
|
|
! dxdx dydy dzdz dx dy dz
|
|
!
|
|
! with Dirichlet boundary conditions
|
|
! u = g
|
|
!
|
|
! on the unit cube 0<=x,y,z<=1.
|
|
!
|
|
!
|
|
! Note that if a1=a2=a3=c=0., the PDE is the Laplace equation.
|
|
!
|
|
import :: psb_ipk_, psb_desc_type, psb_dspmat_type, psb_d_vect_type, d_func_3d
|
|
implicit none
|
|
procedure(d_func_3d) :: a1,a2,a3,c,b1,b2,b3,g
|
|
integer(psb_ipk_) :: idim
|
|
type(psb_dspmat_type) :: a
|
|
type(psb_d_vect_type) :: xv,bv
|
|
type(psb_desc_type) :: desc_a
|
|
integer(psb_ipk_) :: ictxt, info
|
|
character :: afmt*5
|
|
end subroutine gen_prob3d
|
|
end interface
|
|
|
|
|
|
end module psb_d_genmat_mod
|