int
main(void)
{
fmpz_mat_t A;
flint_rand_t state;
long i, m;
fmpz_t det1, det2;
printf("det_multi_mod....");
fflush(stdout);
flint_randinit(state);
for (i = 0; i < 10000; i++)
{
int proved = n_randlimb(state) % 2;
m = n_randint(state, 10);
fmpz_mat_init(A, m, m);
fmpz_init(det1);
fmpz_init(det2);
fmpz_mat_randtest(A, state, 1+n_randint(state,200));
fmpz_mat_det_bareiss(det1, A);
fmpz_mat_det_multi_mod(det2, A, proved);
if (!fmpz_equal(det1, det2))
{
printf("FAIL:\n");
printf("different determinants!\n");
fmpz_mat_print_pretty(A), printf("\n");
printf("det1: "), fmpz_print(det1), printf("\n");
printf("det2: "), fmpz_print(det2), printf("\n");
abort();
}
fmpz_clear(det1);
fmpz_clear(det2);
fmpz_mat_clear(A);
}
for (i = 0; i < 10000; i++)
{
m = 2 + n_randint(state, 10);
fmpz_mat_init(A, m, m);
fmpz_init(det2);
fmpz_mat_randrank(A, state, 1+n_randint(state, m - 1), 1+n_randint(state, 10));
fmpz_mat_randops(A, state, n_randint(state, 2*m*m + 1));
fmpz_mat_det_multi_mod(det2, A, 0);
if (*det2)
{
printf("FAIL:\n");
printf("expected zero determinant!\n");
fmpz_mat_print_pretty(A), printf("\n");
abort();
}
fmpz_mat_clear(A);
fmpz_clear(det2);
}
flint_randclear(state);
_fmpz_cleanup();
printf("PASS\n");
return 0;
}
int
main(void)
{
fmpz_mat_t A, X, B, AX, AXm, Bm;
fmpz_t mod;
slong i, m, n, r;
int success;
FLINT_TEST_INIT(state);
flint_printf("solve_dixon....");
fflush(stdout);
for (i = 0; i < 100 * flint_test_multiplier(); i++)
{
m = n_randint(state, 20);
n = n_randint(state, 20);
fmpz_mat_init(A, m, m);
fmpz_mat_init(B, m, n);
fmpz_mat_init(Bm, m, n);
fmpz_mat_init(X, m, n);
fmpz_mat_init(AX, m, n);
fmpz_mat_init(AXm, m, n);
fmpz_init(mod);
fmpz_mat_randrank(A, state, m, 1+n_randint(state, 2)*n_randint(state, 100));
fmpz_mat_randtest(B, state, 1+n_randint(state, 2)*n_randint(state, 100));
/* Dense */
if (n_randint(state, 2))
fmpz_mat_randops(A, state, 1+n_randint(state, 1 + m*m));
success = fmpz_mat_solve_dixon(X, mod, A, B);
fmpz_mat_set(AXm, X);
fmpz_mat_mul(AX, A, AXm);
fmpz_mat_scalar_mod_fmpz(AXm, AX, mod);
fmpz_mat_scalar_mod_fmpz(Bm, B, mod);
if (!fmpz_mat_equal(AXm, Bm) || !success)
{
flint_printf("FAIL:\n");
flint_printf("AX != B!\n");
flint_printf("A:\n"), fmpz_mat_print_pretty(A), flint_printf("\n");
flint_printf("B:\n"), fmpz_mat_print_pretty(B), flint_printf("\n");
flint_printf("X:\n"), fmpz_mat_print_pretty(X), flint_printf("\n");
flint_printf("mod = "), fmpz_print(mod), flint_printf("\n");
flint_printf("AX:\n"), fmpz_mat_print_pretty(AX), flint_printf("\n");
abort();
}
fmpz_mat_clear(A);
fmpz_mat_clear(B);
fmpz_mat_clear(Bm);
fmpz_mat_clear(X);
fmpz_mat_clear(AX);
fmpz_mat_clear(AXm);
fmpz_clear(mod);
}
/* Test singular systems */
for (i = 0; i < 100 * flint_test_multiplier(); i++)
{
m = 1 + n_randint(state, 10);
n = 1 + n_randint(state, 10);
r = n_randint(state, m);
fmpz_mat_init(A, m, m);
fmpz_mat_init(B, m, n);
fmpz_mat_init(X, m, n);
fmpz_init(mod);
fmpz_mat_randrank(A, state, r, 1+n_randint(state, 2)*n_randint(state, 100));
fmpz_mat_randtest(B, state, 1+n_randint(state, 2)*n_randint(state, 100));
/* Dense */
if (n_randint(state, 2))
fmpz_mat_randops(A, state, 1+n_randint(state, 1 + m*m));
if (fmpz_mat_solve_dixon(X, mod, A, B) != 0)
{
flint_printf("FAIL:\n");
flint_printf("singular system, returned nonzero\n");
abort();
}
fmpz_mat_clear(A);
fmpz_mat_clear(B);
fmpz_mat_clear(X);
fmpz_clear(mod);
}
FLINT_TEST_CLEANUP(state);
flint_printf("PASS\n");
return 0;
}
int
main(void)
{
fmpz_mat_t A, X, B, AX;
fmpz_t den;
slong i, m, n, r;
int success;
FLINT_TEST_INIT(state);
flint_printf("solve_cramer....");
fflush(stdout);
for (i = 0; i < 1000 * flint_test_multiplier(); i++)
{
m = n_randint(state, 4);
n = n_randint(state, 10);
fmpz_mat_init(A, m, m);
fmpz_mat_init(B, m, n);
fmpz_mat_init(X, m, n);
fmpz_mat_init(AX, m, n);
fmpz_init(den);
fmpz_mat_randrank(A, state, m, 1+n_randint(state, 2)*n_randint(state, 100));
fmpz_mat_randtest(B, state, 1+n_randint(state, 2)*n_randint(state, 100));
/* Dense */
if (n_randint(state, 2))
fmpz_mat_randops(A, state, 1+n_randint(state, 1 + m*m));
success = fmpz_mat_solve_cramer(X, den, A, B);
fmpz_mat_mul(AX, A, X);
fmpz_mat_scalar_divexact_fmpz(AX, AX, den);
if (!fmpz_mat_equal(AX, B) || !success)
{
flint_printf("FAIL:\n");
flint_printf("AX != B!\n");
flint_printf("A:\n"), fmpz_mat_print_pretty(A), flint_printf("\n");
flint_printf("B:\n"), fmpz_mat_print_pretty(B), flint_printf("\n");
flint_printf("X:\n"), fmpz_mat_print_pretty(X), flint_printf("\n");
flint_printf("den(X) = "), fmpz_print(den), flint_printf("\n");
flint_printf("AX:\n"), fmpz_mat_print_pretty(AX), flint_printf("\n");
abort();
}
fmpz_mat_clear(A);
fmpz_mat_clear(B);
fmpz_mat_clear(X);
fmpz_mat_clear(AX);
fmpz_clear(den);
}
/* Test singular systems */
for (i = 0; i < 1000 * flint_test_multiplier(); i++)
{
m = 1 + n_randint(state, 3);
n = 1 + n_randint(state, 10);
r = n_randint(state, m);
fmpz_mat_init(A, m, m);
fmpz_mat_init(B, m, n);
fmpz_mat_init(X, m, n);
fmpz_mat_init(AX, m, n);
fmpz_init(den);
fmpz_mat_randrank(A, state, r, 1+n_randint(state, 2)*n_randint(state, 100));
fmpz_mat_randtest(B, state, 1+n_randint(state, 2)*n_randint(state, 100));
/* Dense */
if (n_randint(state, 2))
fmpz_mat_randops(A, state, 1+n_randint(state, 1 + m*m));
success = fmpz_mat_solve_cramer(X, den, A, B);
if (!fmpz_is_zero(den) || success)
{
flint_printf("FAIL:\n");
flint_printf("singular system gave nonzero determinant\n");
abort();
}
fmpz_mat_clear(A);
fmpz_mat_clear(B);
fmpz_mat_clear(X);
fmpz_mat_clear(AX);
fmpz_clear(den);
}
FLINT_TEST_CLEANUP(state);
flint_printf("PASS\n");
return 0;
}
int
main(void)
{
int i;
FLINT_TEST_INIT(state);
flint_printf("solve_dixon....");
fflush(stdout);
/* Solve nonsingular systems */
for (i = 0; i < 100 * flint_test_multiplier(); i++)
{
fmpq_mat_t A, B, X, AX;
fmpq_t d;
int success;
slong n, m, bits;
n = n_randint(state, 10);
m = n_randint(state, 10);
bits = 1 + n_randint(state, 100);
fmpq_mat_init(A, n, n);
fmpq_mat_init(B, n, m);
fmpq_mat_init(X, n, m);
fmpq_mat_init(AX, n, m);
fmpq_init(d);
/* XXX: replace with a randtest function */
do {
fmpq_mat_randtest(A, state, bits);
fmpq_mat_det(d, A);
} while (fmpq_is_zero(d));
fmpq_clear(d);
fmpq_mat_randtest(B, state, bits);
success = fmpq_mat_solve_dixon(X, A, B);
fmpq_mat_mul(AX, A, X);
if (!fmpq_mat_equal(AX, B) || !success)
{
flint_printf("FAIL!\n");
flint_printf("success: %d\n", success);
flint_printf("A:\n");
fmpq_mat_print(A);
flint_printf("B:\n");
fmpq_mat_print(B);
flint_printf("X:\n");
fmpq_mat_print(X);
flint_printf("AX:\n");
fmpq_mat_print(AX);
abort();
}
fmpq_mat_clear(A);
fmpq_mat_clear(B);
fmpq_mat_clear(X);
fmpq_mat_clear(AX);
}
/* Check singular systems */
for (i = 0; i < 100 * flint_test_multiplier(); i++)
{
fmpq_mat_t A, B, X;
fmpz_mat_t M;
fmpz_t den;
slong n, m, bits;
int success;
n = 1 + n_randint(state, 10);
m = 1 + n_randint(state, 10);
bits = 1 + n_randint(state, 100);
fmpz_init(den);
fmpz_mat_init(M, n, n);
fmpz_mat_randrank(M, state, n_randint(state, n), bits);
if (i % 2)
fmpz_mat_randops(M, state, n_randint(state, 2*m*n + 1));
fmpz_randtest_not_zero(den, state, bits);
fmpq_mat_init(A, n, n);
fmpq_mat_set_fmpz_mat_div_fmpz(A, M, den);
fmpq_mat_init(B, n, m);
fmpq_mat_randtest(B, state, bits);
fmpq_mat_init(X, n, m);
success = fmpq_mat_solve_dixon(X, A, B);
if (success != 0)
{
flint_printf("FAIL!\n");
flint_printf("Expected success = 0\n");
fmpq_mat_print(A);
flint_printf("\n");
abort();
}
fmpq_mat_clear(A);
fmpq_mat_clear(B);
fmpq_mat_clear(X);
fmpz_mat_clear(M);
fmpz_clear(den);
}
FLINT_TEST_CLEANUP(state);
flint_printf("PASS\n");
return 0;
}
