fmpz_mat.h

/*=============================================================================

    This file is part of FLINT.

    FLINT is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    FLINT is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with FLINT; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA

=============================================================================*/
/******************************************************************************

    Copyright (C) 2010 William Hart
    Copyright (C) 2010 Fredrik Johansson

******************************************************************************/

#ifndef FMPZ_MAT_H
#define FMPZ_MAT_H

#undef ulong /* interferes with system includes */
#include <stdio.h>
#define ulong unsigned long

#include <gmp.h>
#include "flint.h"
#include "fmpz.h"
#include "nmod_mat.h"
#include "fmpz_poly.h"

#ifdef __cplusplus
 extern "C" {
#endif

typedef struct
{
    fmpz * entries;
    long r;
    long c;
    fmpz ** rows;
} fmpz_mat_struct;

typedef fmpz_mat_struct fmpz_mat_t[1];

/* Memory management  ********************************************************/

#define fmpz_mat_entry(mat,i,j) ((mat)->rows[i] + (j))
#define fmpz_mat_nrows(mat) ((mat)->r)
#define fmpz_mat_ncols(mat) ((mat)->c)

void fmpz_mat_init(fmpz_mat_t mat, long rows, long cols);
void fmpz_mat_init_set(fmpz_mat_t mat, const fmpz_mat_t src);
void fmpz_mat_swap(fmpz_mat_t mat1, fmpz_mat_t mat2);
void fmpz_mat_set(fmpz_mat_t mat1, const fmpz_mat_t mat2);
void fmpz_mat_clear(fmpz_mat_t mat);

int fmpz_mat_equal(const fmpz_mat_t mat1, const fmpz_mat_t mat2);
int fmpz_mat_is_zero(const fmpz_mat_t mat);

static __inline__ int
fmpz_mat_is_empty(const fmpz_mat_t mat)
{
    return (mat->r == 0) || (mat->c == 0);
}

static __inline__ int
fmpz_mat_is_square(const fmpz_mat_t mat)
{
    return (mat->r == mat->c);
}

void fmpz_mat_zero(fmpz_mat_t mat);
void fmpz_mat_one(fmpz_mat_t mat);


/* Input and output  *********************************************************/

int fmpz_mat_fprint(FILE * file, const fmpz_mat_t mat);

int fmpz_mat_fprint_pretty(FILE * file, const fmpz_mat_t mat);

static __inline__
int fmpz_mat_print(const fmpz_mat_t mat)
{
    return fmpz_mat_fprint(stdout, mat);
}

static __inline__
int fmpz_mat_print_pretty(const fmpz_mat_t mat)
{
    return fmpz_mat_fprint_pretty(stdout, mat);
}

int fmpz_mat_fread(FILE* file, fmpz_mat_t mat);

static __inline__
int fmpz_mat_read(fmpz_mat_t mat)
{
    return fmpz_mat_fread(stdin, mat);
}

/* Random matrix generation  *************************************************/

void fmpz_mat_randbits(fmpz_mat_t mat, flint_rand_t state, mp_bitcnt_t bits);
void fmpz_mat_randtest(fmpz_mat_t mat, flint_rand_t state, mp_bitcnt_t bits);
void fmpz_mat_randtest_unsigned(fmpz_mat_t mat, flint_rand_t state, mp_bitcnt_t bits);
void fmpz_mat_randintrel(fmpz_mat_t mat, flint_rand_t state, mp_bitcnt_t bits);
void fmpz_mat_randsimdioph(fmpz_mat_t mat, flint_rand_t state, mp_bitcnt_t bits, mp_bitcnt_t bits2);
void fmpz_mat_randntrulike(fmpz_mat_t mat, flint_rand_t state, mp_bitcnt_t bits, ulong q);
void fmpz_mat_randntrulike2(fmpz_mat_t mat, flint_rand_t state, mp_bitcnt_t bits, ulong q);
void fmpz_mat_randajtai(fmpz_mat_t mat, flint_rand_t state, double alpha);
void fmpz_mat_randrank(fmpz_mat_t mat, flint_rand_t state, long rank, mp_bitcnt_t bits);
void fmpz_mat_randdet(fmpz_mat_t mat, flint_rand_t state, const fmpz_t det);
void fmpz_mat_randops(fmpz_mat_t mat, flint_rand_t state, long count);
int fmpz_mat_randpermdiag(fmpz_mat_t mat, flint_rand_t state, const fmpz * diag, long n);

/* Norms */

long fmpz_mat_max_bits(const fmpz_mat_t mat);

/* Transpose */

void fmpz_mat_transpose(fmpz_mat_t B, const fmpz_mat_t A);

/* Addition and subtraction */

void fmpz_mat_add(fmpz_mat_t C, const fmpz_mat_t A, const fmpz_mat_t B);
void fmpz_mat_sub(fmpz_mat_t C, const fmpz_mat_t A, const fmpz_mat_t B);
void fmpz_mat_neg(fmpz_mat_t B, const fmpz_mat_t A);

/* Scalar operations */
void fmpz_mat_scalar_mul_fmpz(fmpz_mat_t B, const fmpz_mat_t A, const fmpz_t c);
void fmpz_mat_scalar_mul_si(fmpz_mat_t B, const fmpz_mat_t A, long c);
void fmpz_mat_scalar_mul_ui(fmpz_mat_t B, const fmpz_mat_t A, ulong c);

void fmpz_mat_scalar_addmul_fmpz(fmpz_mat_t B, const fmpz_mat_t A, const fmpz_t c);
void fmpz_mat_scalar_addmul_si(fmpz_mat_t B, const fmpz_mat_t A, long c);
void fmpz_mat_scalar_addmul_ui(fmpz_mat_t B, const fmpz_mat_t A, ulong c);

void fmpz_mat_scalar_submul_fmpz(fmpz_mat_t B, const fmpz_mat_t A, const fmpz_t c);
void fmpz_mat_scalar_submul_si(fmpz_mat_t B, const fmpz_mat_t A, long c);
void fmpz_mat_scalar_submul_ui(fmpz_mat_t B, const fmpz_mat_t A, ulong c);

void fmpz_mat_scalar_addmul_nmod_mat_fmpz(fmpz_mat_t B, const nmod_mat_t A, const fmpz_t c);
void fmpz_mat_scalar_addmul_nmod_mat_ui(fmpz_mat_t B, const nmod_mat_t A, ulong c);

void fmpz_mat_scalar_divexact_fmpz(fmpz_mat_t B, const fmpz_mat_t A, const fmpz_t c);
void fmpz_mat_scalar_divexact_si(fmpz_mat_t B, const fmpz_mat_t A, long c);
void fmpz_mat_scalar_divexact_ui(fmpz_mat_t B, const fmpz_mat_t A, ulong c);

void fmpz_mat_scalar_mod_fmpz(fmpz_mat_t B, const fmpz_mat_t A, const fmpz_t m);

/* Multiplication */

void fmpz_mat_mul(fmpz_mat_t C, const fmpz_mat_t A, const fmpz_mat_t B);

void fmpz_mat_mul_classical(fmpz_mat_t C, const fmpz_mat_t A,
    const fmpz_mat_t B);

void fmpz_mat_mul_classical_inline(fmpz_mat_t C, const fmpz_mat_t A,
    const fmpz_mat_t B);

void _fmpz_mat_mul_multi_mod(fmpz_mat_t C, const fmpz_mat_t A,
    const fmpz_mat_t B, long bits);

void fmpz_mat_mul_multi_mod(fmpz_mat_t C, const fmpz_mat_t A,
    const fmpz_mat_t B);

void fmpz_mat_sqr(fmpz_mat_t B, const fmpz_mat_t A);

void fmpz_mat_pow(fmpz_mat_t B, const fmpz_mat_t A, ulong exp);

/* Permutations */

static __inline__ void
fmpz_mat_swap_rows(fmpz_mat_t mat, long * perm, long r, long s)
{
    if (r != s)
    {
        fmpz * u;
        long t;

        if (perm)
        {
            t = perm[s];
            perm[s] = perm[r];
            perm[r] = t;
        }

        u = mat->rows[s];
        mat->rows[s] = mat->rows[r];
        mat->rows[r] = u; 
    }
}

/* Gaussian elimination *****************************************************/

long fmpz_mat_find_pivot_any(const fmpz_mat_t mat,
                                    long start_row, long end_row, long c);

long fmpz_mat_fflu(fmpz_mat_t B, fmpz_t den, long * perm,
                            const fmpz_mat_t A, int rank_check);

long fmpz_mat_rref(fmpz_mat_t B, fmpz_t den, const fmpz_mat_t A);

/* Modular gaussian elimination *********************************************/

long
fmpz_mat_rref_mod(long * perm, fmpz_mat_t A, const fmpz_t p);

/* Trace ********************************************************************/

void fmpz_mat_trace(fmpz_t trace, const fmpz_mat_t mat);

/* Determinant **************************************************************/

void fmpz_mat_det(fmpz_t det, const fmpz_mat_t A);

void fmpz_mat_det_cofactor(fmpz_t det, const fmpz_mat_t A);
void _fmpz_mat_det_cofactor_2x2(fmpz_t det, fmpz ** const x);
void _fmpz_mat_det_cofactor_3x3(fmpz_t det, fmpz ** const x);
void _fmpz_mat_det_cofactor_4x4(fmpz_t det, fmpz ** const x);

void fmpz_mat_det_bareiss(fmpz_t det, const fmpz_mat_t A);

void fmpz_mat_det_modular(fmpz_t det, const fmpz_mat_t A, int proved);

void fmpz_mat_det_modular_accelerated(fmpz_t det,
    const fmpz_mat_t A, int proved);

void fmpz_mat_det_modular_given_divisor(fmpz_t det, const fmpz_mat_t A,
        const fmpz_t d, int proved);

void fmpz_mat_det_bound(fmpz_t bound, const fmpz_mat_t A);
void fmpz_mat_det_divisor(fmpz_t d, const fmpz_mat_t A);

/* Characteristic polynomial ************************************************/

void _fmpz_mat_charpoly(fmpz *cp, const fmpz_mat_t mat);
void fmpz_mat_charpoly(fmpz_poly_t cp, const fmpz_mat_t mat);

/* Rank *********************************************************************/

long fmpz_mat_rank(const fmpz_mat_t A);

/* Nonsingular solving ******************************************************/

void fmpz_mat_solve_bound(fmpz_t N, fmpz_t D,
        const fmpz_mat_t A, const fmpz_mat_t B);

int fmpz_mat_solve(fmpz_mat_t X, fmpz_t den,
        const fmpz_mat_t A, const fmpz_mat_t B);

int fmpz_mat_solve_cramer(fmpz_mat_t X, fmpz_t den,
        const fmpz_mat_t A, const fmpz_mat_t B);

int fmpz_mat_solve_fflu(fmpz_mat_t X, fmpz_t den,
        const fmpz_mat_t A, const fmpz_mat_t B);

void fmpz_mat_solve_fflu_precomp(fmpz_mat_t X, const long * perm,
        const fmpz_mat_t FFLU, const fmpz_mat_t B);

int fmpz_mat_solve_dixon(fmpz_mat_t X, fmpz_t mod,
        const fmpz_mat_t A, const fmpz_mat_t B);

/* Nullspace ****************************************************************/

long fmpz_mat_nullspace(fmpz_mat_t res, const fmpz_mat_t mat);

/* Inverse ******************************************************************/

int fmpz_mat_inv(fmpz_mat_t B, fmpz_t den, const fmpz_mat_t A);

/* Modular reduction and reconstruction *************************************/

void fmpz_mat_set_nmod_mat(fmpz_mat_t A, const nmod_mat_t Amod);

void fmpz_mat_set_nmod_mat_unsigned(fmpz_mat_t A, const nmod_mat_t Amod);

void fmpz_mat_get_nmod_mat(nmod_mat_t Amod, const fmpz_mat_t A);

void fmpz_mat_CRT_ui(fmpz_mat_t res, const fmpz_mat_t mat1,
                        const fmpz_t m1, const nmod_mat_t mat2, int sign);

void
fmpz_mat_multi_mod_ui_precomp(nmod_mat_t * residues, long nres, 
    const fmpz_mat_t mat, fmpz_comb_t comb, fmpz_comb_temp_t temp);

void
fmpz_mat_multi_mod_ui(nmod_mat_t * residues, long nres, const fmpz_mat_t mat);

void
fmpz_mat_multi_CRT_ui_precomp(fmpz_mat_t mat,
    nmod_mat_t * const residues, long nres,
    fmpz_comb_t comb, fmpz_comb_temp_t temp, int sign);

void fmpz_mat_multi_CRT_ui(fmpz_mat_t mat, nmod_mat_t * const residues,
    long nres, int sign);

#ifdef __cplusplus
}
#endif

#endif