Aztec2Petra.h File Reference

Aztec2Petra: A function that converts an Aztec linear problem to a Petra linear problem. More...

#include "az_aztec.h"
#include "Epetra_SerialComm.h"
#include "Epetra_Map.h"
#include "Epetra_Vector.h"
#include "Epetra_VbrMatrix.h"
#include "Epetra_CrsMatrix.h"

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Functions
int	Aztec2Petra (int *proc_config, AZ_MATRIX *Amat, double *az_x, double *az_b, Epetra_Comm *&comm, Epetra_BlockMap *&map, Epetra_RowMatrix *&A, Epetra_Vector *&x, Epetra_Vector *&b, int **global_indices)
	Converts from an Aztec linear problem to a Petra linear problem.

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Detailed Description

Aztec2Petra: A function that converts an Aztec linear problem to a Petra linear problem.

Aztec2Petra takes the Aztec proc_config, Amat, az_x and az_b objects and converts them into corresponding Petra equivalents: comm, map (layout information), A, x, and b. This function is used by AZOO_iterate, but can be used independently by someone making a transistion from Aztec to Trilinos/AztecOO.

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Function Documentation

int Aztec2Petra (  int *  proc_config, AZ_MATRIX *  Amat, double *  az_x, double *  az_b, Epetra_Comm *&  comm, Epetra_BlockMap *&  map, Epetra_RowMatrix *&  A, Epetra_Vector *&  x, Epetra_Vector *&  b, int **  global_indices )

Converts from an Aztec linear problem to a Petra linear problem. Parameters: proc_config  (In) Aztec array containing information about the parallel machine. Amat  (In) An Aztec AZ_MATRIX structure. Must be an MSR or VBR matrix at this time. az_x  (In) The Aztec initial guess/solution vector. Must be of adequate length on each processor for any ghost values (unnecessary in uniprocessor mode). az_b  (In) The Aztec right hand side vector. . comm  (Out) A pointer to a Epetra_Comm object. Must be deleted by the caller of this function. map  (Out) A pointer to a Epetra_BlockMap object. Must be deleted by the caller of this function. Note: This object may actually be a Epetra_Map object, but Epetra_BlockMap is a base clase for Epetra_Map. A  (Out) A pointer to a Epetra_RowMatrix object containing a deep copy of the matrix in Amat, if the user matrix is an Msr matrix. It is a shallow copy of the matrix if the user matrix is in Vbr format. Must be deleted by the caller of this function. Note: This pointer will actually point to a Epetra_CrsMatrix or a Epetra_VbrMatrix. We cast the pointer to a Epetra_RowMatrix because it is the abstract base class used by AztecOO. x  (Out) A pointer to a Epetra_Vector object containing a shallow copy (view) of az_x. Must be deleted by the caller of this function. b  (Out) A pointer to a Epetra_Vector object containing a shallow copy (view) of az_b. Must be deleted by the caller of this function. global_indices  (Out) A pointer to an internally created integer array. If the user matrix is in Vbr format, this array contains a copy of the column index values in global mode. By using this array, we can avoid a deep copy of the user matrix in this case. SPECIAL NOTE: This array must be delete using the special Aztec function as follows: if (global_indices!=0) AZ_free((void *) global_indices);

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