# VECFEM3 Reference Manual: vemu13

Type: FORTRAN routine

## NAME

vemu13 - prints a solution given at the geometrical nodes

## SYNOPSIS

CALL VEMU13(
  LU, U, NORMU, LIVEM, IVEM, LNEK, NEK, LRPARM, RPARM, LIPARM, IPARM, LDNOD, DNOD, LRDPRM, RDPARM, LIDPRM, IDPARM, LNODN, NODNUM, LNOD, NOD, LNOPRM, NOPARM, LBIG, RBIG, IBIG)
INTEGER
  LU, LIVEM, LNEK, LRPARM, LIPARM, LDNOD, LRDPRM, LIDPRM, LNODN, LNOPRM, LBIG
INTEGER
  IVEM(LIVEM), NEK(LNEK), IPARM(LIPARM), DNOD(LDNOD), IDPARM(LIDPRM), NODNUM(LNODN), IBIG(*)
DOUBLE PRECISION
  U(LU), NORMU(*), RPARM(LRPARM), RDPARM(LRDPRM), NOD(LDNOD), NOPARM(LNOPRM), RBIG(LBIG)

## PURPOSE

vemu13 is a routine to print a NU-valued solution U on the first process. U is given at the geometrical nodes on the processes. Additionally the maximum norms NORMU of the components of U are computed over all processors. Only values lower than 10.D0**IVEM(4) are considered.

## ARGUMENTS

LU integer, scalar, input, local
  Length of the input solution vector, LU>=NDEG*NU.
U double precision, array: U(LU), input, local
  The input solution vector at the geometrical nodes. U(U1*(j-1)+i) is the value of the j-th component at the i-th geometrical node on the process MYPROC. If a geometrical node has different values on two processes, an arbitrarily selected value of the two is printed.
NORMU double precision, array: NORMU(NU), output,global
  The maximum norm of the solution vector. NORMU(j) is the norm of the j-th component.
LIVEM integer, scalar, input, local
  Length of the integer information vector, LIVEM>= MESH+ NINFO.
IVEM integer, array: IVEM(LIVEM), input/output, local/global
  Integer information vector.
  (1)=MESH, input, local
    Start address of the mesh informations in IVEM, MESH>203+ NPROC.
  (2)=ERR, output, global
    Error number.

    0 | program terminated without error.
    90 | LBIG is too small.
    95 | IVEM or U is too small.
    99 | fatal error.

  (4), input, local
    Only entries lower than 10.D0**IVEM(4) are printed and considered in the norm calculation.
  (5)=NIVEM, output, local
    Used length of IVEM.
  (23)=LOUT, input, local
    Unit number of the standard output file, normally 6.
  (24)=OUTCNT, input, local
    Output control flag.

    >0 | only error messages are printed.
    >1 | in addition a protocol and the norm of the inputsolution is printed.
    >2 | in addition the solution is printed on process 1.

  (25)=U1, input, local
    Leading dimension of the input solution array, U1>=NDEG.
  (26)=NU, input, global
    Number of components of the input solution.
  (200)=NPROC, input, global
    Number of processes, see combgn.
  (201)=MYPROC, input, local
    Logical process id number, see combgn.
  (202)=NMSG, input/output, global
    Message counter. The difference of the input and the output values gives the number of communications during the vemu13 call.
  (204)=TIDS(1), input, global
    Begin of the list TIDS which defines the mapping of the logical process ids to the physical process ids. See combgn.
  (MESH), input, local
    Start of mesh informations, see mesh.
LNEK integer, scalar, input, local
  Length of the element array.
NEK integer, array: NEK(LNEK), input, local
  Array of the elements, see mesh.
LRPARM integer, scalar, input, local
  Length of the real parameter array.
RPARM double precision, array: RPARM(LRPARM), input, local
  Real parameter array, see mesh.
LIPARM integer, scalar, input, local
  Length of the integer parameter array.
IPARM integer, array: IPARM(LIPARM), input, local
  Integer parameter array, see mesh.
LDNOD integer, scalar, input, local
  Length of the array of the Dirichlet nodes.
DNOD integer, array: DNOD(LDNOD), input, local
  Array of the Dirichlet nodes, see mesh.
LRDPRM integer, scalar, input, local
  Length of the real Dirichlet parameter array.
RDPARM double precision, array: RDPARM(LRDPRM), input, local
  Array of the real Dirichlet parameters, see mesh.
LIDPRM integer, scalar, input, local
  Length of the integer Dirichlet parameter array.
IDPARM integer, array: IDPARM(LIDPRM), input, local
  Array of the integer Dirichlet parameters, see mesh.
LNODN integer, scalar, input, local
  Length of the array of the id numbers of the geometrical nodes.
NODNUM integer, array: NODNUM(LNODN), input, local
  Array of the id numbers of the geometrical nodes, see mesh.
LNOD integer, scalar, input, local
  Length of the array of the coordinates of the geometrical nodes.
NOD double precision, array: NOD(LNOD), input, local
  Array of the coordinates of the geometrical nodes, see mesh.
LNOPRM integer, scalar, input, local
  Length of the array of the node parameters.
NOPARM double precision, array: NOPARM(LNOPRM), input, local
  Array of the node parameters, see mesh.
LBIG integer, scalar, input, local
  Length of the real work array. A minimal length of LBIG cannot be given. It should be as large as possible.
RBIG double precision, array: RBIG(LBIG), work array, local
  Real work array.
IBIG integer, array: IBIG(*), work array, local
  Integer work array, RBIG and IBIG have to be defined by the EQUIVALENCE statement.

## EXAMPLE

See vemexamples. If you want to check the quality of an FEM approximation of a problem with a well-known solution, you can use vemu05 to compute the error of the approximation at the geometrical nodes. vemu13 computes the norm of error over all processes.

## REFERENCES

[FAQ], [DATAMAN], [DATAMAN2], [P_MPI].

## SEE ALSO

VECFEM, vemcompile, vemrun, vemhint, mesh, vemexamples, vemdis, vemu05.

## COPYRIGHTS

Program by L. Grosz, C. Roll, P. Sternecker, 1989-1996. Copyrights by Universitaet Karlsruhe 1989-1996. Copyrights by Lutz Grosz 1996. All rights reserved. More details see VECFEM.

by L. Grosz, Auckland , 6. June, 2000.