/usr/include/HYPRE_lobpcg.h is in libhypre-dev 2.8.0b-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright (c) 2008, Lawrence Livermore National Security, LLC.
* Produced at the Lawrence Livermore National Laboratory.
* This file is part of HYPRE. See file COPYRIGHT for details.
*
* HYPRE is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License (as published by the Free
* Software Foundation) version 2.1 dated February 1999.
*
* $Revision: 2.9 $
***********************************************************************EHEADER*/
#ifndef hypre_LOBPCG_SOLVER
#define hypre_LOBPCG_SOLVER
#include "HYPRE_krylov.h"
#include "fortran_matrix.h"
#include "multivector.h"
#include "interpreter.h"
#include "HYPRE_MatvecFunctions.h"
#ifdef __cplusplus
extern "C" {
#endif
/*--------------------------------------------------------------------------
*--------------------------------------------------------------------------*/
/**
* @name Eigensolvers
*
* These eigensolvers support many of the matrix/vector storage schemes in
* hypre. They should be used in conjunction with the storage-specific
* interfaces.
*
* @memo A basic interface for eigensolvers
**/
/*@{*/
/*--------------------------------------------------------------------------
*--------------------------------------------------------------------------*/
/**
* @name EigenSolvers
**/
/*@{*/
#ifndef HYPRE_SOLVER_STRUCT
#define HYPRE_SOLVER_STRUCT
struct hypre_Solver_struct;
/**
* The solver object.
**/
typedef struct hypre_Solver_struct *HYPRE_Solver;
#endif
#ifndef HYPRE_MATRIX_STRUCT
#define HYPRE_MATRIX_STRUCT
struct hypre_Matrix_struct;
/**
* The matrix object.
**/
typedef struct hypre_Matrix_struct *HYPRE_Matrix;
#endif
#ifndef HYPRE_VECTOR_STRUCT
#define HYPRE_VECTOR_STRUCT
struct hypre_Vector_struct;
/**
* The vector object.
**/
typedef struct hypre_Vector_struct *HYPRE_Vector;
#endif
/*@}*/
/*--------------------------------------------------------------------------
*--------------------------------------------------------------------------*/
/**
* @name LOBPCG Eigensolver
**/
/*@{*/
/**
* LOBPCG constructor.
*/
HYPRE_Int HYPRE_LOBPCGCreate(mv_InterfaceInterpreter *interpreter,
HYPRE_MatvecFunctions *mvfunctions,
HYPRE_Solver *solver);
/**
* LOBPCG destructor.
*/
HYPRE_Int HYPRE_LOBPCGDestroy(HYPRE_Solver solver);
/**
* (Optional) Set the preconditioner to use. If not called, preconditioning is
* not used.
**/
HYPRE_Int HYPRE_LOBPCGSetPrecond(HYPRE_Solver solver,
HYPRE_PtrToSolverFcn precond,
HYPRE_PtrToSolverFcn precond_setup,
HYPRE_Solver precond_solver);
/**
**/
HYPRE_Int HYPRE_LOBPCGGetPrecond(HYPRE_Solver solver,
HYPRE_Solver *precond_data_ptr);
/**
* Set up {\tt A} and the preconditioner (if there is one).
**/
HYPRE_Int HYPRE_LOBPCGSetup(HYPRE_Solver solver,
HYPRE_Matrix A,
HYPRE_Vector b,
HYPRE_Vector x);
/**
* (Optional) Set up {\tt B}. If not called, B = I.
**/
HYPRE_Int HYPRE_LOBPCGSetupB(HYPRE_Solver solver,
HYPRE_Matrix B,
HYPRE_Vector x);
/**
* (Optional) Set the preconditioning to be applied to Tx = b, not Ax = b.
**/
HYPRE_Int HYPRE_LOBPCGSetupT(HYPRE_Solver solver,
HYPRE_Matrix T,
HYPRE_Vector x);
/**
* Solve A x = lambda B x, y'x = 0.
**/
HYPRE_Int HYPRE_LOBPCGSolve(HYPRE_Solver solver,
mv_MultiVectorPtr y,
mv_MultiVectorPtr x,
double *lambda );
/**
* (Optional) Set the absolute convergence tolerance.
**/
HYPRE_Int HYPRE_LOBPCGSetTol(HYPRE_Solver solver,
double tol);
/**
* (Optional) Set maximum number of iterations.
**/
HYPRE_Int HYPRE_LOBPCGSetMaxIter(HYPRE_Solver solver,
HYPRE_Int max_iter);
/**
* Define which initial guess for inner PCG iterations to use: {\tt mode} = 0:
* use zero initial guess, otherwise use RHS.
**/
HYPRE_Int HYPRE_LOBPCGSetPrecondUsageMode(HYPRE_Solver solver,
HYPRE_Int mode);
/**
* (Optional) Set the amount of printing to do to the screen.
**/
HYPRE_Int HYPRE_LOBPCGSetPrintLevel(HYPRE_Solver solver,
HYPRE_Int level);
/* Returns the pointer to residual norms matrix (blockSize x 1) */
utilities_FortranMatrix*
HYPRE_LOBPCGResidualNorms(HYPRE_Solver solver);
/* Returns the pointer to residual norms history matrix (blockSize x maxIter) */
utilities_FortranMatrix*
HYPRE_LOBPCGResidualNormsHistory(HYPRE_Solver solver);
/* Returns the pointer to eigenvalue history matrix (blockSize x maxIter) */
utilities_FortranMatrix*
HYPRE_LOBPCGEigenvaluesHistory(HYPRE_Solver solver);
/* Returns the number of iterations performed by LOBPCG */
HYPRE_Int HYPRE_LOBPCGIterations(HYPRE_Solver solver);
void hypre_LOBPCGMultiOperatorB(void *data,
void *x,
void *y);
void lobpcg_MultiVectorByMultiVector(mv_MultiVectorPtr x,
mv_MultiVectorPtr y,
utilities_FortranMatrix *xy);
/*@}*/
/*--------------------------------------------------------------------------
*--------------------------------------------------------------------------*/
/*@}*/
#ifdef __cplusplus
}
#endif
#endif
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