cg.h
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	#ifndef CG_H_
	#define CG_H_

	#include <stdio.h>
	#include <stdlib.h>
	#include <string.h>
	#include <math.h>
	#include "util.h"
	#include "parameters.h"
	#include <cblas.h>

	void cgsolver( double A, double b, double *x, int m, int n );
	double * init_source_term(int n, double h);
	void smvm(int m, const double* val, const int* col, const int* row, const double* x, double* y);
	void cgsolver_sparse( double Aval, int row, int col, double b, double *x, int n);

	#endif /CG_H_/