[petsc-users] Problem with fortran version of ex29 in ksp

TAY wee-beng zonexo at gmail.com
Tue Apr 24 15:57:03 CDT 2012


Hi,

I still got the same error the moment this subroutine is called, after 
changing to :

call 
MatNullSpaceCreate(PETSC_COMM_WORLD,PETSC_TRUE,PETSC_NULL_INTEGER,PETSC_NULL_OBJECT,nullspace,ierr)


[0]PETSC ERROR: Null argument, when expecting valid pointer!
[0]PETSC ERROR: Null Object: Parameter # 4!
[0]PETSC ERROR: 
----------------------------------------------------------------
--------
[0]PETSC ERROR: Petsc Development HG revision: 
fc934c1d84bc6ba8e2686702a8a99539d
50af122  HG Date: Mon Apr 23 11:39:32 2012 -0500
[0]PETSC ERROR: See docs/changes/index.html for recent updates.
[0]PETSC ERROR: See docs/faq.html for hints about trouble shooting.
[0]PETSC ERROR: See docs/index.html for manual pages.
[0]PETSC ERROR: 
----------------------------------------------------------------
--------
[0]PETSC ERROR: c:\obj_tmp\ex29f\Debug\ex29f.exe on a petsc-3.2 named 
USER-PC by
  User Tue Apr 24 22:54:50 2012
[0]PETSC ERROR: Libraries linked from 
/cygdrive/d/Lib/petsc-3.2-dev_win32_vs2008
/lib
[0]PETSC ERROR: Configure run at Mon Apr 23 21:45:20 2012
[0]PETSC ERROR: Configure options --with-cc="win32fe cl" 
--with-fc="win32fe ifor
t" --with-cxx="win32fe cl" --with-mpi-dir=/cygdrive/d/Lib/MPICH2/ 
--download-f-b
las-lapack=1 --prefix=/cygdrive/d/Lib/petsc-3.2-dev_win32_vs2008 
--with-debuggin
g=1 --useThreads=0
[0]PETSC ERROR: 
----------------------------------------------------------------
--------
[0]PETSC ERROR: MatNullSpaceCreate() line 250 in 
src/mat/interface/C:\temp\PETSC
-~1\src\mat\INTERF~1\matnull.c

Yours sincerely,

TAY wee-beng


On 24/4/2012 10:37 PM, Matthew Knepley wrote:
> On Tue, Apr 24, 2012 at 4:32 PM, TAY wee-beng <zonexo at gmail.com 
> <mailto:zonexo at gmail.com>> wrote:
>
>     Hi,
>
>     I'm trying to rewrite ex29 (KSP^Laplacian, 2d) from c to fortran
>     version. The fortran version is based on the template of ex22f,
>     which is in 3d.
>
>     I have attached the code below. I have 2 problems.
>
>     1. When i3 = -3, in dirichlet BC, I got the same answer as ex29 in
>     c version.
>
>     However, when I change i3 to -4, I got the following error:
>
>     [0]PETSC ERROR: --------------------- Error Message
>     ----------------------------
>     --------
>     [0]PETSC ERROR: Argument out of range!
>     [0]PETSC ERROR: New nonzero at (9,1) caused a malloc!
>     [0]PETSC ERROR:
>     ----------------------------------------------------------------
>     --------
>     [0]PETSC ERROR: Petsc Development HG revision:
>     fc934c1d84bc6ba8e2686702a8a99539d
>     50af122  HG Date: Mon Apr 23 11:39:32 2012 -0500
>     [0]PETSC ERROR: See docs/changes/index.html for recent updates.
>     [0]PETSC ERROR: See docs/faq.html for hints about trouble shooting.
>     [0]PETSC ERROR: See docs/index.html for manual pages.
>     [0]PETSC ERROR:
>     ----------------------------------------------------------------
>     --------
>     [0]PETSC ERROR: c:\obj_tmp\ex29f\Debug\ex29f.exe on a petsc-3.2
>     named USER-PC by
>      User Tue Apr 24 22:08:46 2012
>     [0]PETSC ERROR: Libraries linked from
>     /cygdrive/d/Lib/petsc-3.2-dev_win32_vs2008
>     /lib
>     [0]PETSC ERROR: Configure run at Mon Apr 23 21:45:20 2012
>     [0]PETSC ERROR: Configure options --with-cc="win32fe cl"
>     --with-fc="win32fe ifor
>     t" --with-cxx="win32fe cl" --with-mpi-dir=/cygdrive/d/Lib/MPICH2/
>     --download-f-b
>     las-lapack=1 --prefix=/cygdrive/d/Lib/petsc-3.2-dev_win32_vs2008
>     --with-debuggin
>     g=1 --useThreads=0
>     [0]PETSC ERROR:
>     ----------------------------------------------------------------
>     --------
>     [0]PETSC ERROR: MatSetValues_SeqAIJ() line 331 in
>     src/mat/impls/aij/seq/C:\temp\
>     PETSC-~1\src\mat\impls\aij\seq\aij.c
>     [0]PETSC ERROR: MatSetValues() line 1148 in
>     src/mat/interface/C:\temp\PETSC-~1\s
>     rc\mat\INTERF~1\matrix.c
>     [0]PETSC ERROR: MatSetValuesLocal() line 2003 in
>     src/mat/interface/C:\temp\PETSC
>     -~1\src\mat\INTERF~1\matrix.c
>     [0]PETSC ERROR: MatSetValuesStencil() line 1379 in
>     src/mat/interface/C:\temp\PET
>     SC-~1\src\mat\INTERF~1\matrix.c
>     [0]PETSC ERROR: --------------------- Error Message
>     ----------------------------
>     --------
>     [0]PETSC ERROR: Argument out of range!
>     [0]PETSC ERROR: New nonzero at (10,2) caused a malloc!
>
>     ...
>
>     What did I do wrong?
>
>
>     2. When I wanted to use the neumann BC, following ex29, I added :
>
>     In subroutine ComputeRHS
>
>     call
>     MatNullSpaceCreate(PETSC_COMM_WORLD,PETSC_TRUE,PETSC_NULL_INTEGER,PETSC_NULL_INTEGER,nullspace,ierr)
>
>     call MatNullSpaceRemove(nullspace,b,PETSC_NULL,ierr)
>
>     call MatNullSpaceDestroy(nullspace,ierr)
>
>     and in subroutine ComputeMatrix
>
>     call
>     MatNullSpaceCreate(PETSC_COMM_WORLD,PETSC_TRUE,PETSC_NULL_INTEGER,PETSC_NULL_INTEGER,nullspace,ierr)
>
>     call MatSetNullSpace(jac,nullspace,ierr)
>
>     call MatNullSpaceDestroy(nullspace,ierr)
>
>     When I compile, it says unresolved external symbol
>     MatNullSpaceRemove. Removing MatNullSpaceRemove, I can compile but
>     running gives the error:
>
>     [0]PETSC ERROR: --------------------- Error Message
>     ----------------------------
>     --------
>     [0]PETSC ERROR: Corrupt argument:
>     see http://www.mcs.anl.gov/petsc/documentation/faq.html#valgrind!
>     [0]PETSC ERROR: Invalid Pointer to Object: Parameter # 4!
>     [0]PETSC ERROR:
>     ----------------------------------------------------------------
>     --------
>     [0]PETSC ERROR: Petsc Development HG revision:
>     fc934c1d84bc6ba8e2686702a8a99539d
>     50af122  HG Date: Mon Apr 23 11:39:32 2012 -0500
>     [0]PETSC ERROR: See docs/changes/index.html for recent updates.
>     [0]PETSC ERROR: See docs/faq.html for hints about trouble shooting.
>     [0]PETSC ERROR: See docs/index.html for manual pages.
>     [0]PETSC ERROR:
>     ----------------------------------------------------------------
>     --------
>     [0]PETSC ERROR: c:\obj_tmp\ex29f\Debug\ex29f.exe on a petsc-3.2
>     named USER-PC by
>      User Tue Apr 24 22:30:31 2012
>     [0]PETSC ERROR: Libraries linked from
>     /cygdrive/d/Lib/petsc-3.2-dev_win32_vs2008
>     /lib
>     [0]PETSC ERROR: Configure run at Mon Apr 23 21:45:20 2012
>     [0]PETSC ERROR: Configure options --with-cc="win32fe cl"
>     --with-fc="win32fe ifor
>     t" --with-cxx="win32fe cl" --with-mpi-dir=/cygdrive/d/Lib/MPICH2/
>     --download-f-b
>     las-lapack=1 --prefix=/cygdrive/d/Lib/petsc-3.2-dev_win32_vs2008
>     --with-debuggin
>     g=1 --useThreads=0
>     [0]PETSC ERROR:
>     ----------------------------------------------------------------
>     --------
>     [0]PETSC ERROR: MatNullSpaceCreate() line 250 in
>     src/mat/interface/C:\temp\PETSC
>     -~1\src\mat\INTERF~1\matnull.c
>     [0]PETSC ERROR: --------------------- Error Message
>     ----------------------------
>     --------
>     [0]PETSC ERROR: Invalid argument!
>     [0]PETSC ERROR: Wrong type of object: Parameter # 1!
>     [0]PETSC ERROR:
>     ----------------------------------------------------------------
>     --------
>     [0]PETSC ERROR: Petsc Development HG revision:
>     fc934c1d84bc6ba8e2686702a8a99539d
>     50af122  HG Date: Mon Apr 23 11:39:32 2012 -0500
>     [0]PETSC ERROR: See docs/changes/index.html for recent updates.
>     [0]PETSC ERROR: See docs/faq.html for hints about trouble shooting.
>     [0]PETSC ERROR: See docs/index.html for manual pages.
>     [0]PETSC ERROR:
>     ----------------------------------------------------------------
>     --------
>     [0]PETSC ERROR: c:\obj_tmp\ex29f\Debug\ex29f.exe on a petsc-3.2
>     named USER-PC by
>      User Tue Apr 24 22:30:31 2012
>     [0]PETSC ERROR: Libraries linked from
>     /cygdrive/d/Lib/petsc-3.2-dev_win32_vs2008
>     /lib
>     [0]PETSC ERROR: Configure run at Mon Apr 23 21:45:20 2012
>     [0]PETSC ERROR: Configure options --with-cc="win32fe cl"
>     --with-fc="win32fe ifor
>     t" --with-cxx="win32fe cl" --with-mpi-dir=/cygdrive/d/Lib/MPICH2/
>     --download-f-b
>     las-lapack=1 --prefix=/cygdrive/d/Lib/petsc-3.2-dev_win32_vs2008
>     --with-debuggin
>     g=1 --useThreads=0
>     [0]PETSC ERROR:
>     ----------------------------------------------------------------
>     --------
>     [0]PETSC ERROR: MatNullSpaceDestroy() line 305 in
>     src/mat/interface/C:\temp\PETS
>     C-~1\src\mat\INTERF~1\matnull.c
>     [0]PETSC ERROR: ourdmfunction() line 30 in
>     src/dm/interface/ftn-custom/C:\temp\P
>     ETSC-~1\src\dm\INTERF~1\FTN-CU~1\zdmf.c
>     [0]PETSC ERROR: DMComputeFunction() line 1783 in
>     src/dm/interface/C:\temp\PETSC-
>     ~1\src\dm\INTERF~1\dm.c
>     [0]PETSC ERROR: KSPSetUp() line 218 in
>     src/ksp/ksp/interface/C:\temp\PETSC-~1\sr
>     c\ksp\ksp\INTERF~1\itfunc.c
>     [0]PETSC ERROR: --------------------- Error Message
>     ----------------------------
>     --------
>     [0]PETSC ERROR: Corrupt argument:
>     see http://www.mcs.anl.gov/petsc/documentation/faq.html#valgrind!
>     [0]PETSC ERROR: Invalid Pointer to Object: Parameter # 4!
>     [0]PETSC ERROR:
>     ----------------------------------------------------------------
>     --------
>     [0]PETSC ERROR: Petsc Development HG revision:
>     fc934c1d84bc6ba8e2686702a8a99539d
>     50af122  HG Date: Mon Apr 23 11:39:32 2012 -0500
>     [0]PETSC ERROR: See docs/changes/index.html for recent updates.
>     [0]PETSC ERROR: See docs/faq.html for hints about trouble shooting.
>     [0]PETSC ERROR: See docs/index.html for manual pages.
>     [0]PETSC ERROR:
>     ----------------------------------------------------------------
>     --------
>     [0]PETSC ERROR: c:\obj_tmp\ex29f\Debug\ex29f.exe on a petsc-3.2
>     named USER-PC by
>      User Tue Apr 24 22:30:31 2012
>     [0]PETSC ERROR: Libraries linked from
>     /cygdrive/d/Lib/petsc-3.2-dev_win32_vs2008
>     /lib
>     [0]PETSC ERROR: Configure run at Mon Apr 23 21:45:20 2012
>     [0]PETSC ERROR: Configure options --with-cc="win32fe cl"
>     --with-fc="win32fe ifor
>     t" --with-cxx="win32fe cl" --with-mpi-dir=/cygdrive/d/Lib/MPICH2/
>     --download-f-b
>     las-lapack=1 --prefix=/cygdrive/d/Lib/petsc-3.2-dev_win32_vs2008
>     --with-debuggin
>     g=1 --useThreads=0
>     [0]PETSC ERROR:
>     ----------------------------------------------------------------
>     --------
>     [0]PETSC ERROR: MatNullSpaceCreate() line 250 in
>     src/mat/interface/C:\temp\PETSC
>     -~1\src\mat\INTERF~1\matnull.c
>     [0]PETSC ERROR: --------------------- Error Message
>     ----------------------------
>     --------
>     [0]PETSC ERROR: Invalid argument!
>     [0]PETSC ERROR: Wrong type of object: Parameter # 1!
>     [0]PETSC ERROR:
>     ----------------------------------------------------------------
>     --------
>     [0]PETSC ERROR: Petsc Development HG revision:
>     fc934c1d84bc6ba8e2686702a8a99539d
>     50af122  HG Date: Mon Apr 23 11:39:32 2012 -0500
>     [0]PETSC ERROR: See docs/changes/index.html for recent updates.
>     [0]PETSC ERROR: See docs/faq.html for hints about trouble shooting.
>     [0]PETSC ERROR: See docs/index.html for manual pages.
>     [0]PETSC ERROR:
>     ----------------------------------------------------------------
>     --------
>     [0]PETSC ERROR: c:\obj_tmp\ex29f\Debug\ex29f.exe on a petsc-3.2
>     named USER-PC by
>      User Tue Apr 24 22:30:31 2012
>     [0]PETSC ERROR: Libraries linked from
>     /cygdrive/d/Lib/petsc-3.2-dev_win32_vs2008
>     /lib
>     [0]PETSC ERROR: Configure run at Mon Apr 23 21:45:20 2012
>     [0]PETSC ERROR: Configure options --with-cc="win32fe cl"
>     --with-fc="win32fe ifor
>     t" --with-cxx="win32fe cl" --with-mpi-dir=/cygdrive/d/Lib/MPICH2/
>     --download-f-b
>     las-lapack=1 --prefix=/cygdrive/d/Lib/petsc-3.2-dev_win32_vs2008
>     --with-debuggin
>     g=1 --useThreads=0
>     [0]PETSC ERROR:
>     ----------------------------------------------------------------
>     --------
>     [0]PETSC ERROR: MatNullSpaceDestroy() line 305 in
>     src/mat/interface/C:\temp\PETS
>     C-~1\src\mat\INTERF~1\matnull.c
>     [0]PETSC ERROR: ourdmfunction() line 30 in
>     src/dm/interface/ftn-custom/C:\temp\P
>     ETSC-~1\src\dm\INTERF~1\FTN-CU~1\zdmf.c
>     [0]PETSC ERROR: DMComputeFunction() line 1783 in
>     src/dm/interface/C:\temp\PETSC-
>     ~1\src\dm\INTERF~1\dm.c
>     [0]PETSC ERROR: KSPSetUp() line 218 in
>     src/ksp/ksp/interface/C:\temp\PETSC-~1\sr
>     c\ksp\ksp\INTERF~1\itfunc.c
>     [0]PETSC ERROR: KSPSolve() line 402 in
>     src/ksp/ksp/interface/C:\temp\PETSC-~1\sr
>     c\ksp\ksp\INTERF~1\itfunc.c
>     Vector Object:Vec_0000000084000000_0 1 MPI processes
>       type: mpi
>     Process [0]
>
>     What's wrong?
>
>
>     *program ex29f*
>
>     implicit none
>
>     ! - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
>     - - - -
>     !                    Include files
>     ! - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
>     - - - -
>     !
>     !     petscsys.h  - base PETSc routines      petscvec.h - vectors
>     !     petscmat.h - matrices
>     !     petscksp.h    - Krylov subspace methods  petscpc.h  -
>     preconditioners
>
>     #include "finclude/petsc.h90"
>
>     PetscErrorCode   ierr
>
>     DM               da
>
>     KSP              ksp
>
>     Vec              x
>
>     external         ComputeRHS,ComputeMatrix
>
>     PetscInt i1,i3
>
>     call  PetscInitialize(PETSC_NULL_CHARACTER,ierr)
>
>     i3 = -4
>
>     i1 = 1
>
>     call KSPCreate(MPI_COMM_WORLD,ksp,ierr)
>
>     call
>     DMDACreate2d(PETSC_COMM_WORLD,DMDA_BOUNDARY_NONE,DMDA_BOUNDARY_NONE,DMDA_STENCIL_STAR,i3,i3,PETSC_DECIDE,PETSC_DECIDE,i1,i1,PETSC_NULL_INTEGER,PETSC_NULL_INTEGER,da,ierr)
>     call DMSetFunction(da,ComputeRHS,ierr)
>     call DMSetJacobian(da,ComputeMatrix,ierr)
>     call KSPSetDM(ksp,da,ierr)
>
>     call KSPSetFromOptions(ksp,ierr)
>     call KSPSetUp(ksp,ierr)
>     call KSPSolve(ksp,PETSC_NULL_OBJECT,PETSC_NULL_OBJECT,ierr)
>     call KSPGetSolution(ksp,x,ierr)
>     call VecView(x,PETSC_VIEWER_STDOUT_WORLD,ierr)
>     call KSPDestroy(ksp,ierr)
>     call DMDestroy(da,ierr)
>     call PetscFinalize(ierr)
>
>     end program ex29f
>
>     subroutine ComputeRHS(da,x,b,ierr)
>
>     implicit none
>
>     #include "finclude/petsc.h90"
>
>     PetscErrorCode  ierr
>     PetscInt i,j,mx,my,xm,ym,xs,ys
>     PetscScalar  h,nu,rho
>     PetscScalar Hx,Hy
>     PetscScalar,pointer :: array(:,:)
>     Vec          x,b
>     DM           da
>     MatNullSpace nullspace    !>neumann BC
>
>     nu = 0.1
>
>     call
>     DMDAGetInfo(da,PETSC_NULL_INTEGER,mx,my,PETSC_NULL_INTEGER,PETSC_NULL_INTEGER,PETSC_NULL_INTEGER,PETSC_NULL_INTEGER,PETSC_NULL_INTEGER,PETSC_NULL_INTEGER,PETSC_NULL_INTEGER,PETSC_NULL_INTEGER,PETSC_NULL_INTEGER,PETSC_NULL_INTEGER,ierr)
>
>     Hx = 1.d0 / (mx-1)
>
>     Hy = 1.d0 / (my-1)
>
>     call
>     DMDAGetCorners(da,xs,ys,PETSC_NULL_INTEGER,xm,ym,PETSC_NULL_INTEGER,ierr)
>
>     call DMDAVecGetArrayF90(da,b,array,ierr)
>
>     do j = ys,ys+ym-1
>
>         do i = xs,xs+xm-1
>
>             array(i,j) =
>     exp(-(i*Hx)*(i*Hx)/nu)*exp(-(j*Hy)*(j*Hy)/nu)*Hx*Hy
>
>         end do
>
>     end do
>
>     call DMDAVecRestoreArrayF90(da,b,array,ierr)
>
>     call VecAssemblyBegin(b,ierr)
>
>     call VecAssemblyEnd(b,ierr)
>
>     !call
>     MatNullSpaceCreate(PETSC_COMM_WORLD,PETSC_TRUE,PETSC_NULL_INTEGER,PETSC_NULL_INTEGER,nullspace,ierr)
>
>
> 4th argument should be PETSC_NULL_OBJECT.
>
>    Matt
>
>     !call MatNullSpaceRemove(nullspace,b,PETSC_NULL,ierr)
>
>     !call MatNullSpaceDestroy(nullspace,ierr)
>
>     end subroutine ComputeRHS
>
>
>     subroutine ComputeMatrix(da,x,JJ,jac,str,ierr)
>
>     implicit none
>
>     #include "finclude/petsc.h90"
>
>     Mat          jac,JJ
>
>     PetscErrorCode    ierr
>
>     DM           da
>
>     PetscInt    i,j,k,mx,my,xm
>
>     PetscInt    ym,xs,ys,i1,i5
>
>     PetscScalar  v(5),Hx,Hy,rho,centerRho
>
>     PetscScalar  HydHx
>
>     PetscScalar  HxdHy
>
>     MatStencil   row(4),col(4,5)
>
>     Vec          x
>
>     MatStructure str
>
>     MatNullSpace nullspace    !>neumann BC
>
>     rho = 1.0
>
>     i1 = 1
>
>     i5 = 5
>
>     centerRho = rho
>
>     call
>     DMDAGetInfo(da,PETSC_NULL_INTEGER,mx,my,PETSC_NULL_INTEGER,PETSC_NULL_INTEGER,PETSC_NULL_INTEGER,PETSC_NULL_INTEGER,PETSC_NULL_INTEGER,PETSC_NULL_INTEGER,PETSC_NULL_INTEGER,PETSC_NULL_INTEGER,PETSC_NULL_INTEGER,PETSC_NULL_INTEGER,ierr)
>
>     Hx = 1.d0 / (mx-1)
>
>     Hy = 1.d0 / (my-1)
>
>     HxdHy = Hx/Hy
>
>     HydHx = Hy/Hx
>
>     call
>     DMDAGetCorners(da,xs,ys,PETSC_NULL_INTEGER,xm,ym,PETSC_NULL_INTEGER,ierr)
>
>
>     do j=ys,ys+ym-1
>
>         do i=xs,xs+xm-1
>
>             row(MatStencil_i) = i
>
>             row(MatStencil_j) = j
>
>             call ComputeRho(i,j,mx,my,centerRho,rho)
>
>             if (i.eq.0 .or. j.eq.0 .or. i.eq.mx-1 .or. j.eq.my-1) then
>
>                 v(1) = 2.0*rho*(HxdHy + HydHx)
>
>                 call
>     MatSetValuesStencil(jac,i1,row,i1,row,v,INSERT_VALUES,ierr)
>
>             else
>
>                 v(1) = -rho*HxdHy
>
>                 col(MatStencil_i,1) = i
>
>                 col(MatStencil_j,2) = j-1
>
>
> Cut and paste error above.
>
>   Matt
>
>                 v(2) = -rho*HydHx
>
>                 col(MatStencil_i,2) = i-1
>
>                 col(MatStencil_j,2) = j
>
>                 v(3) = 2.0*rho*(HxdHy + HydHx)
>
>                 col(MatStencil_i,3) = i
>
>                 col(MatStencil_j,3) = j
>
>                 v(4) = -rho*HydHx
>
>                 col(MatStencil_i,4) = i+1
>
>                 col(MatStencil_j,4) = j
>
>                 v(5) = -rho*HxdHy
>
>                 col(MatStencil_i,5) = i
>
>                 col(MatStencil_j,5) = j+1
>
>                 call
>     MatSetValuesStencil(jac,i1,row,i5,col,v,INSERT_VALUES,ierr)
>
>             end if
>
>         end do
>
>     end do
>
>     call MatAssemblyBegin(jac,MAT_FINAL_ASSEMBLY,ierr)
>
>     call MatAssemblyEnd(jac,MAT_FINAL_ASSEMBLY,ierr)
>
>     !call
>     MatNullSpaceCreate(PETSC_COMM_WORLD,PETSC_TRUE,PETSC_NULL_INTEGER,PETSC_NULL_INTEGER,nullspace,ierr)
>
>     !call MatSetNullSpace(jac,nullspace,ierr)
>
>     !call MatNullSpaceDestroy(nullspace,ierr)
>
>     end subroutine ComputeMatrix
>
>     subroutine ComputeRho(i,j,mx,my,centerRho,rho)
>
>     PetscInt    i,j,mx,my
>
>     PetscScalar  rho,centerRho
>
>     if ((i > mx/3.0) .and. (i < 2.0*mx/3.0) .and. (j > my/3.0) .and.
>     (j < 2.0*my/3.0)) then
>
>         rho = centerRho
>
>     else
>
>         rho = 1.0
>
>     end if
>
>
>     end subroutine ComputeRho
>
>     -- 
>     Yours sincerely,
>
>     TAY wee-beng
>
>
>
>
> -- 
> What most experimenters take for granted before they begin their 
> experiments is infinitely more interesting than any results to which 
> their experiments lead.
> -- Norbert Wiener
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20120424/070c3e2f/attachment-0001.htm>


More information about the petsc-users mailing list