int
bessel(acb_ptr out, const acb_t inp, void * params, long order, long prec)
{
acb_ptr t;
acb_t z;
ulong n;
t = _acb_vec_init(order);
acb_init(z);
acb_set(t, inp);
if (order > 1)
acb_one(t + 1);
n = 10;
arb_set_si(acb_realref(z), 20);
arb_set_si(acb_imagref(z), 10);
/* z sin(t) */
_acb_poly_sin_series(out, t, FLINT_MIN(2, order), order, prec);
_acb_vec_scalar_mul(out, out, order, z, prec);
/* t n */
_acb_vec_scalar_mul_ui(t, t, FLINT_MIN(2, order), n, prec);
_acb_poly_sub(out, t, FLINT_MIN(2, order), out, order, prec);
_acb_poly_cos_series(out, out, order, order, prec);
_acb_vec_clear(t, order);
acb_clear(z);
return 0;
}
void
custom_rate_mixture_get_prob(arb_t prob, const custom_rate_mixture_t x,
slong idx, slong prec)
{
if (x->mode == RATE_MIXTURE_UNDEFINED)
{
flint_fprintf(stderr, "internal error: undefined rate mixture\n");
abort();
}
else if (x->mode == RATE_MIXTURE_NONE)
{
arb_one(prob);
}
else if (x->mode == RATE_MIXTURE_UNIFORM)
{
/*
* This code branch involves a division that could
* unnecessarily lose exactness in some situations.
*/
arb_set_si(prob, x->n);
arb_inv(prob, prob, prec);
}
else if (x->mode == RATE_MIXTURE_CUSTOM)
{
arb_set_d(prob, x->prior[idx]);
}
else
{
flint_fprintf(stderr, "internal error: "
"unrecognized rate mixture mode\n");
abort();
}
}
static void
bsplit(arb_poly_t pol, const arb_t sqrtD,
const slong * qbf, slong a, slong b, slong prec)
{
if (b - a == 0)
{
arb_poly_one(pol);
}
else if (b - a == 1)
{
acb_t z;
acb_init(z);
/* j((-b+sqrt(-D))/(2a)) */
arb_set_si(acb_realref(z), -FLINT_ABS(qbf[3 * a + 1]));
arb_set(acb_imagref(z), sqrtD);
acb_div_si(z, z, 2 * qbf[3 * a], prec);
acb_modular_j(z, z, prec);
if (qbf[3 * a + 1] < 0)
{
/* (x^2 - 2re(j) x + |j|^2) */
arb_poly_fit_length(pol, 3);
arb_mul(pol->coeffs, acb_realref(z), acb_realref(z), prec);
arb_addmul(pol->coeffs, acb_imagref(z), acb_imagref(z), prec);
arb_mul_2exp_si(pol->coeffs + 1, acb_realref(z), 1);
arb_neg(pol->coeffs + 1, pol->coeffs + 1);
arb_one(pol->coeffs + 2);
_arb_poly_set_length(pol, 3);
}
else
{
/* (x-j) */
arb_poly_fit_length(pol, 2);
arb_neg(pol->coeffs, acb_realref(z));
arb_one(pol->coeffs + 1);
_arb_poly_set_length(pol, 2);
}
acb_clear(z);
}
else
{
arb_poly_t tmp;
arb_poly_init(tmp);
bsplit(pol, sqrtD, qbf, a, a + (b - a) / 2, prec);
bsplit(tmp, sqrtD, qbf, a + (b - a) / 2, b, prec);
arb_poly_mul(pol, pol, tmp, prec);
arb_poly_clear(tmp);
}
}
void
arb_poly_set_coeff_si(arb_poly_t poly, long n, long x)
{
arb_poly_fit_length(poly, n + 1);
if (n + 1 > poly->length)
{
_arb_vec_zero(poly->coeffs + poly->length, n - poly->length);
poly->length = n + 1;
}
arb_set_si(poly->coeffs + n, x);
_arb_poly_normalise(poly);
}
static __inline__ void
zeta_coeff_k(zeta_bsplit_t S, slong k, slong n, slong s)
{
arb_set_si(S->D, 2 * (n + k));
arb_mul_si(S->D, S->D, n - k, ARF_PREC_EXACT);
arb_set_si(S->Q1, k + 1);
arb_mul_si(S->Q1, S->Q1, 2*k + 1, ARF_PREC_EXACT);
if (k == 0)
{
arb_zero(S->A);
arb_one(S->Q2);
}
else
{
arb_set_si(S->A, k % 2 ? 1 : -1);
arb_mul(S->A, S->A, S->Q1, ARF_PREC_EXACT);
arb_ui_pow_ui(S->Q2, k, s, ARF_PREC_EXACT);
}
arb_mul(S->Q3, S->Q1, S->Q2, ARF_PREC_EXACT);
arb_zero(S->B);
arb_set(S->C, S->Q1);
}
void
arb_zeta_ui_borwein_bsplit(arb_t x, ulong s, slong prec)
{
zeta_bsplit_t sum;
mag_t err;
slong wp, n;
/* zeta(0) = -1/2 */
if (s == 0)
{
arb_set_si(x, -1);
arb_mul_2exp_si(x, x, -1);
return;
}
if (s == 1)
{
flint_printf("zeta_ui_borwein_bsplit: zeta(1)");
abort();
}
n = prec / ERROR_B + 2;
wp = prec + 30;
zeta_bsplit_init(sum);
zeta_bsplit(sum, 0, n + 1, n, s, 0, wp);
/* A/Q3 - B/Q3 / (C/Q1) = (A*C - B*Q1) / (Q3*C) */
arb_mul(sum->A, sum->A, sum->C, wp);
arb_mul(sum->B, sum->B, sum->Q1, wp);
arb_sub(sum->A, sum->A, sum->B, wp);
arb_mul(sum->Q3, sum->Q3, sum->C, wp);
arb_div(sum->C, sum->A, sum->Q3, wp);
mag_init(err);
mag_borwein_error(err, n);
mag_add(arb_radref(sum->C), arb_radref(sum->C), err);
mag_clear(err);
/* convert from eta(s) to zeta(s) */
arb_div_2expm1_ui(x, sum->C, s - 1, wp);
arb_mul_2exp_si(x, x, s - 1);
zeta_bsplit_clear(sum);
}
int
_acb_modular_hilbert_class_poly(fmpz_poly_t res, slong D,
const slong * qbf, slong qbf_len, slong prec)
{
arb_t sqrtD;
arb_poly_t pol;
int success;
arb_init(sqrtD);
arb_poly_init(pol);
arb_set_si(sqrtD, -D);
arb_sqrt(sqrtD, sqrtD, prec);
bsplit(pol, sqrtD, qbf, 0, qbf_len, prec);
success = arb_poly_get_unique_fmpz_poly(res, pol);
arb_clear(sqrtD);
arb_poly_clear(pol);
return success;
}
int main()
{
slong iter;
flint_rand_t state;
flint_printf("taylor_shift_convolution....");
fflush(stdout);
flint_randinit(state);
for (iter = 0; iter < 2000 * arb_test_multiplier(); iter++)
{
slong prec1, prec2;
arb_poly_t f, g;
arb_t c, d, e;
prec1 = 2 + n_randint(state, 500);
prec2 = 2 + n_randint(state, 500);
arb_poly_init(f);
arb_poly_init(g);
arb_init(c);
arb_init(d);
arb_init(e);
arb_poly_randtest(f, state, 1 + n_randint(state, 40), 1 + n_randint(state, 500), 10);
arb_poly_randtest(g, state, 1 + n_randint(state, 20), 1 + n_randint(state, 500), 10);
if (n_randint(state, 2))
arb_set_si(c, n_randint(state, 5) - 2);
else
arb_randtest(c, state, 1 + n_randint(state, 500), 1 + n_randint(state, 100));
if (n_randint(state, 2))
arb_set_si(d, n_randint(state, 5) - 2);
else
arb_randtest(d, state, 1 + n_randint(state, 500), 1 + n_randint(state, 100));
arb_add(e, c, d, prec1);
/* check f(x+c)(x+d) = f(x+c+d) */
arb_poly_taylor_shift_convolution(g, f, e, prec2);
arb_poly_taylor_shift_convolution(f, f, c, prec1);
arb_poly_taylor_shift_convolution(f, f, d, prec1);
if (!arb_poly_overlaps(f, g))
{
flint_printf("FAIL\n\n");
flint_printf("c = ");
arb_printd(c, 15);
flint_printf("\n\n");
flint_printf("d = ");
arb_printd(d, 15);
flint_printf("\n\n");
flint_printf("f = ");
arb_poly_printd(f, 15);
flint_printf("\n\n");
flint_printf("g = ");
arb_poly_printd(g, 15);
flint_printf("\n\n");
abort();
}
arb_poly_clear(f);
arb_poly_clear(g);
arb_clear(c);
arb_clear(d);
arb_clear(e);
}
flint_randclear(state);
flint_cleanup();
flint_printf("PASS\n");
return EXIT_SUCCESS;
}
int main()
{
slong iter;
flint_rand_t state;
flint_printf("sub_si....");
fflush(stdout);
flint_randinit(state);
for (iter = 0; iter < 10000; iter++)
{
arb_t a, b, c, d;
slong x;
slong prec;
arb_init(a);
arb_init(b);
arb_init(c);
arb_init(d);
arb_randtest_special(a, state, 1 + n_randint(state, 2000), 100);
arb_randtest_special(b, state, 1 + n_randint(state, 2000), 100);
arb_randtest_special(c, state, 1 + n_randint(state, 2000), 100);
x = z_randtest(state);
prec = 2 + n_randint(state, 2000);
arb_set_si(b, x);
arb_sub_si(c, a, x, prec);
arb_sub(d, a, b, prec);
if (!arb_equal(c, d))
{
flint_printf("FAIL\n\n");
flint_printf("a = "); arb_print(a); flint_printf("\n\n");
flint_printf("b = "); arb_print(b); flint_printf("\n\n");
flint_printf("c = "); arb_print(c); flint_printf("\n\n");
flint_printf("d = "); arb_print(d); flint_printf("\n\n");
abort();
}
arb_clear(a);
arb_clear(b);
arb_clear(c);
arb_clear(d);
}
/* aliasing */
for (iter = 0; iter < 10000; iter++)
{
arb_t a, b, c;
slong x;
slong prec;
arb_init(a);
arb_init(b);
arb_init(c);
arb_randtest_special(a, state, 1 + n_randint(state, 2000), 100);
arb_randtest_special(b, state, 1 + n_randint(state, 2000), 100);
arb_randtest_special(c, state, 1 + n_randint(state, 2000), 100);
x = z_randtest(state);
prec = 2 + n_randint(state, 2000);
arb_set_si(b, x);
arb_sub_si(c, a, x, prec);
arb_sub_si(a, a, x, prec);
if (!arb_equal(a, c))
{
flint_printf("FAIL (aliasing)\n\n");
flint_printf("a = "); arb_print(a); flint_printf("\n\n");
flint_printf("b = "); arb_print(b); flint_printf("\n\n");
flint_printf("c = "); arb_print(c); flint_printf("\n\n");
abort();
}
arb_clear(a);
arb_clear(b);
arb_clear(c);
}
flint_randclear(state);
flint_cleanup();
flint_printf("PASS\n");
return EXIT_SUCCESS;
}
int main()
{
slong iter;
flint_rand_t state;
flint_printf("power_sum_vec....");
fflush(stdout);
flint_randinit(state);
for (iter = 0; iter < 1000 * arb_test_multiplier(); iter++)
{
arb_t a, b, s, t;
arb_ptr res;
slong aa, bb, k, n, len;
slong prec;
len = n_randint(state, 30);
prec = 2 + n_randint(state, 500);
aa = n_randint(state, 50) - 50;
bb = aa + n_randint(state, 50);
arb_init(a);
arb_init(b);
arb_init(s);
arb_init(t);
res = _arb_vec_init(len);
arb_set_si(a, aa);
arb_set_si(b, bb);
arb_power_sum_vec(res, a, b, len, prec);
for (n = 0; n < len; n++)
{
arb_zero(s);
for (k = aa; k < bb; k++)
{
arb_set_si(t, k);
arb_pow_ui(t, t, n, prec);
arb_add(s, s, t, prec);
}
if (!arb_overlaps(res + n, s))
{
flint_printf("FAIL: overlap\n\n");
flint_printf("a = %wd, b = %wd, n = %wd\n\n", aa, bb, n);
flint_printf("res = "); arb_printd(res + n, 30); flint_printf("\n\n");
flint_printf("s = "); arb_printd(s, 30); flint_printf("\n\n");
abort();
}
}
arb_clear(a);
arb_clear(b);
arb_clear(s);
arb_clear(t);
_arb_vec_clear(res, len);
}
flint_randclear(state);
flint_cleanup();
flint_printf("PASS\n");
return EXIT_SUCCESS;
}
void
keiper_li_series(arb_ptr z, slong len, slong prec)
{
arb_ptr t, u, v;
t = _arb_vec_init(len);
u = _arb_vec_init(len);
v = _arb_vec_init(len);
/* -zeta(s) */
flint_printf("zeta: ");
TIMEIT_ONCE_START
arb_zero(t + 0);
arb_one(t + 1);
arb_one(u);
_arb_poly_zeta_series(v, t, 2, u, 0, len, prec);
_arb_vec_neg(v, v, len);
TIMEIT_ONCE_STOP
SHOW_MEMORY_USAGE
/* logarithm */
flint_printf("log: ");
TIMEIT_ONCE_START
_arb_poly_log_series(t, v, len, len, prec);
TIMEIT_ONCE_STOP
/* add log(gamma(1+s/2)) */
flint_printf("gamma: ");
TIMEIT_ONCE_START
arb_one(u);
arb_one(u + 1);
arb_mul_2exp_si(u + 1, u + 1, -1);
_arb_poly_lgamma_series(v, u, 2, len, prec);
_arb_vec_add(t, t, v, len, prec);
TIMEIT_ONCE_STOP
/* subtract 0.5 s log(pi) */
arb_const_pi(u, prec);
arb_log(u, u, prec);
arb_mul_2exp_si(u, u, -1);
arb_sub(t + 1, t + 1, u, prec);
/* add log(1-s) */
arb_one(u);
arb_set_si(u + 1, -1);
_arb_poly_log_series(v, u, 2, len, prec);
_arb_vec_add(t, t, v, len, prec);
/* binomial transform */
flint_printf("binomial transform: ");
TIMEIT_ONCE_START
arb_set(z, t);
_arb_vec_neg(t + 1, t + 1, len - 1);
_arb_poly_binomial_transform(z + 1, t + 1, len - 1, len - 1, prec);
TIMEIT_ONCE_STOP
_arb_vec_clear(t, len);
_arb_vec_clear(u, len);
_arb_vec_clear(v, len);
}
void
_arb_poly_rgamma_series(arb_ptr res, arb_srcptr h, long hlen, long len, long prec)
{
int reflect;
long i, rflen, r, n, wp;
arb_ptr t, u, v;
arb_struct f[2];
hlen = FLINT_MIN(hlen, len);
wp = prec + FLINT_BIT_COUNT(prec);
t = _arb_vec_init(len);
u = _arb_vec_init(len);
v = _arb_vec_init(len);
arb_init(f);
arb_init(f + 1);
/* use zeta values at small integers */
if (arb_is_int(h) && (arf_cmpabs_ui(arb_midref(h), prec / 2) < 0))
{
r = arf_get_si(arb_midref(h), ARF_RND_DOWN);
_arb_poly_lgamma_series_at_one(u, len, wp);
_arb_vec_neg(u, u, len);
_arb_poly_exp_series(t, u, len, len, wp);
if (r == 1)
{
_arb_vec_swap(v, t, len);
}
else if (r <= 0)
{
arb_set(f, h);
arb_one(f + 1);
rflen = FLINT_MIN(len, 2 - r);
_arb_poly_rising_ui_series(u, f, FLINT_MIN(2, len), 1 - r, rflen, wp);
_arb_poly_mullow(v, t, len, u, rflen, len, wp);
}
else
{
arb_one(f);
arb_one(f + 1);
rflen = FLINT_MIN(len, r);
_arb_poly_rising_ui_series(v, f, FLINT_MIN(2, len), r - 1, rflen, wp);
/* TODO: use div_series? */
_arb_poly_inv_series(u, v, rflen, len, wp);
_arb_poly_mullow(v, t, len, u, len, len, wp);
}
}
else
{
/* otherwise use Stirling series */
arb_gamma_stirling_choose_param(&reflect, &r, &n, h, 1, 0, wp);
/* rgamma(h) = (gamma(1-h+r) sin(pi h)) / (rf(1-h, r) * pi), h = h0 + t*/
if (reflect)
{
/* u = gamma(r+1-h) */
arb_sub_ui(f, h, r + 1, wp);
arb_neg(f, f);
_arb_poly_gamma_stirling_eval(t, f, n, len, wp);
_arb_poly_exp_series(u, t, len, len, wp);
for (i = 1; i < len; i += 2)
arb_neg(u + i, u + i);
/* v = sin(pi x) */
arb_const_pi(f + 1, wp);
arb_mul(f, h, f + 1, wp);
_arb_poly_sin_series(v, f, 2, len, wp);
_arb_poly_mullow(t, u, len, v, len, len, wp);
/* rf(1-h,r) * pi */
if (r == 0)
{
arb_const_pi(u, wp);
_arb_vec_scalar_div(v, t, len, u, wp);
}
else
{
arb_sub_ui(f, h, 1, wp);
arb_neg(f, f);
arb_set_si(f + 1, -1);
rflen = FLINT_MIN(len, r + 1);
_arb_poly_rising_ui_series(v, f, FLINT_MIN(2, len), r, rflen, wp);
arb_const_pi(u, wp);
_arb_vec_scalar_mul(v, v, rflen, u, wp);
/* divide by rising factorial */
/* TODO: might better to use div_series, when it has a good basecase */
_arb_poly_inv_series(u, v, rflen, len, wp);
_arb_poly_mullow(v, t, len, u, len, len, wp);
}
}
else
{
/* rgamma(h) = rgamma(h+r) rf(h,r) */
if (r == 0)
{
arb_add_ui(f, h, r, wp);
_arb_poly_gamma_stirling_eval(t, f, n, len, wp);
_arb_vec_neg(t, t, len);
_arb_poly_exp_series(v, t, len, len, wp);
}
else
{
arb_set(f, h);
arb_one(f + 1);
rflen = FLINT_MIN(len, r + 1);
_arb_poly_rising_ui_series(t, f, FLINT_MIN(2, len), r, rflen, wp);
arb_add_ui(f, h, r, wp);
_arb_poly_gamma_stirling_eval(v, f, n, len, wp);
_arb_vec_neg(v, v, len);
_arb_poly_exp_series(u, v, len, len, wp);
_arb_poly_mullow(v, u, len, t, rflen, len, wp);
}
}
}
/* compose with nonconstant part */
arb_zero(t);
_arb_vec_set(t + 1, h + 1, hlen - 1);
_arb_poly_compose_series(res, v, len, t, hlen, len, prec);
arb_clear(f);
arb_clear(f + 1);
_arb_vec_clear(t, len);
_arb_vec_clear(u, len);
_arb_vec_clear(v, len);
}
int main(int argc, char *argv[])
{
acb_t r, s, a, b;
arf_t inr, outr;
long digits, prec;
if (argc < 2)
{
printf("integrals d\n");
printf("compute integrals using d decimal digits of precision\n");
return 1;
}
acb_init(r);
acb_init(s);
acb_init(a);
acb_init(b);
arf_init(inr);
arf_init(outr);
arb_calc_verbose = 0;
digits = atol(argv[1]);
prec = digits * 3.32193;
printf("Digits: %ld\n", digits);
printf("----------------------------------------------------------------\n");
printf("Integral of sin(t) from 0 to 100.\n");
arf_set_d(inr, 0.125);
arf_set_d(outr, 1.0);
TIMEIT_ONCE_START
acb_set_si(a, 0);
acb_set_si(b, 100);
acb_calc_integrate_taylor(r, sinx, NULL, a, b, inr, outr, prec, 1.1 * prec);
printf("RESULT:\n");
acb_printd(r, digits); printf("\n");
TIMEIT_ONCE_STOP
printf("----------------------------------------------------------------\n");
printf("Elliptic integral F(phi, m) = integral of 1/sqrt(1 - m*sin(t)^2)\n");
printf("from 0 to phi, with phi = 6+6i, m = 1/2. Integration path\n");
printf("0 -> 6 -> 6+6i.\n");
arf_set_d(inr, 0.2);
arf_set_d(outr, 0.5);
TIMEIT_ONCE_START
acb_set_si(a, 0);
acb_set_si(b, 6);
acb_calc_integrate_taylor(r, elliptic, NULL, a, b, inr, outr, prec, 1.1 * prec);
acb_set_si(a, 6);
arb_set_si(acb_realref(b), 6);
arb_set_si(acb_imagref(b), 6);
acb_calc_integrate_taylor(s, elliptic, NULL, a, b, inr, outr, prec, 1.1 * prec);
acb_add(r, r, s, prec);
printf("RESULT:\n");
acb_printd(r, digits); printf("\n");
TIMEIT_ONCE_STOP
printf("----------------------------------------------------------------\n");
printf("Bessel function J_n(z) = (1/pi) * integral of cos(t*n - z*sin(t))\n");
printf("from 0 to pi. With n = 10, z = 20 + 10i.\n");
arf_set_d(inr, 0.1);
arf_set_d(outr, 0.5);
TIMEIT_ONCE_START
acb_set_si(a, 0);
acb_const_pi(b, 3 * prec);
acb_calc_integrate_taylor(r, bessel, NULL, a, b, inr, outr, prec, 3 * prec);
acb_div(r, r, b, prec);
printf("RESULT:\n");
acb_printd(r, digits); printf("\n");
TIMEIT_ONCE_STOP
acb_clear(r);
acb_clear(s);
acb_clear(a);
acb_clear(b);
arf_clear(inr);
arf_clear(outr);
flint_cleanup();
return 0;
}
int main()
{
slong iter;
FLINT_TEST_INIT(state);
{
ulong k;
arb_t a,b;
arf_t c,d;
fmpq_poly_t p;
arb_init(a);
arb_init(b);
arf_init(c);
arf_init(d);
/* x+1 */
fmpq_poly_init(p);
fmpq_poly_set_coeff_si(p, 0, 1);
fmpq_poly_set_coeff_si(p, 1, 1);
for (iter = 0; iter < 5000; iter++)
{
k = n_randint(state, 10000);
arb_set_si(a, k);
fmpq_poly_evaluate_arb(b, p, a, 30 + n_randint(state, 100));
if (!arb_equal_si(b, k + 1))
{
printf("FAIL (fmpq_poly_evaluate_arb):\n");
printf("a = "); arb_print(a); printf("\n");
printf("b = "); arb_print(b); printf("\n");
printf("p = "); fmpq_poly_print(p); printf("\n");
abort();
}
arf_set_si(c, k);
fmpq_poly_evaluate_arf(d, p, c, 30 + n_randint(state, 100));
if (!arf_equal_si(d, k + 1))
{
printf("FAIL (fmpq_poly_evaluate_arf):\n");
printf("c = "); arf_print(c); printf("\n");
printf("d = "); arf_print(d); printf("\n");
printf("p = "); fmpq_poly_print(p); printf("\n");
abort();
}
}
/* x^2 */
fmpq_poly_zero(p);
fmpq_poly_set_coeff_si(p, 2, 1);
for (iter = 0; iter < 1000; iter++)
{
k = n_randint(state, 10000);
arb_set_si(a, k);
fmpq_poly_evaluate_arb(b, p, a, 30 + n_randint(state, 100));
if (!arb_equal_si(b, k * k))
{
printf("Error (test_fmpq_poly_evaluate_arb):\n");
printf("a = "); arb_print(a); printf("\n");
printf("b = "); arb_print(b); printf("\n");
printf("p = "); fmpq_poly_print(p); printf("\n");
abort();
}
arf_set_si(c, k);
fmpq_poly_evaluate_arf(d, p, c, 30 + n_randint(state, 100));
if (!arf_equal_si(d, k * k))
{
printf("Error (test_fmpq_poly_evaluate_arf):\n");
printf("c = "); arf_print(c); printf("\n");
printf("d = "); arf_print(d); printf("\n");
printf("p = "); fmpq_poly_print(p); printf("\n");
abort();
}
}
fmpq_poly_clear(p);
arb_clear(a);
arb_clear(b);
arf_clear(c);
arf_clear(d);
}
/* check evaluate_arb agains exact evaluate_fmpq */
for (iter = 0; iter < 1000; iter++)
{
fmpq_poly_t p;
fmpq_t x,y;
arb_t a,b;
fmpq_poly_init(p);
fmpq_init(x);
fmpq_init(y);
arb_init(a);
arb_init(b);
fmpq_poly_randtest(p, state, 1 + n_randint(state,100), 10);
fmpq_randtest(x, state, 10);
arb_set_fmpq(a, x, 64);
fmpq_poly_evaluate_fmpq(y, p, x);
fmpq_poly_evaluate_arb(b, p, a, 60);
if (!arb_contains_fmpq(b, y))
{
printf("FAIL (y not in b):\n");
printf("p = "); fmpq_poly_print(p); printf("\n");
printf("x = "); fmpq_print(x); printf("\n");
printf("y = "); fmpq_print(y); printf("\n");
printf("a = "); arb_print(a); printf("\n");
printf("b = "); arb_print(b); printf("\n");
abort();
}
fmpq_poly_evaluate_arb(a, p, a, 60);
if (!arb_equal(a,b))
{
printf("FAIL (a not equal b):\n");
printf("p = "); fmpq_poly_print(p); printf("\n");
printf("x = "); fmpq_print(x); printf("\n");
printf("y = "); fmpq_print(y); printf("\n");
printf("a = "); arb_print(a); printf("\n");
printf("b = "); arb_print(b); printf("\n");
abort();
}
fmpq_poly_clear(p);
fmpq_clear(x);
fmpq_clear(y);
arb_clear(a);
arb_clear(b);
}
/* test aliasing */
for (iter = 0; iter < 1000; iter++)
{
fmpq_poly_t p;
arb_t a,b;
arf_t c,d;
fmpq_poly_init(p);
arb_init(a);
arb_init(b);
arf_init(c);
arf_init(d);
fmpq_poly_randtest(p, state, 1 + n_randint(state,100), 10);
arb_randtest(a, state, 60, 10);
arb_randtest(b, state, 60, 10);
arf_randtest(c, state, 60, 10);
arf_randtest(d, state, 60, 10);
fmpq_poly_evaluate_arb(b, p, a, 60);
fmpq_poly_evaluate_arb(a, p, a, 60);
if (!arb_equal(a, b))
{
printf("FAIL (a not equal b):\n");
printf("p = "); fmpq_poly_print(p); printf("\n");
printf("a = "); arb_print(a); printf("\n");
printf("b = "); arb_print(b); printf("\n");
abort();
}
fmpq_poly_evaluate_arf(d, p, c, 60);
fmpq_poly_evaluate_arf(c, p, c, 60);
if (!arf_equal(c, d))
{
printf("FAIL (c not equal d):\n");
printf("p = "); fmpq_poly_print(p); printf("\n");
printf("c = "); arf_print(c); printf("\n");
printf("d = "); arf_print(d); printf("\n");
}
fmpq_poly_clear(p);
arb_clear(a);
arb_clear(b);
arf_clear(c);
arf_clear(d);
}
FLINT_TEST_CLEANUP(state);
return 0;
}
void
_arb_poly_zeta_series(arb_ptr res, arb_srcptr h, long hlen, const arb_t a, int deflate, long len, long prec)
{
long i;
acb_t cs, ca;
acb_ptr z;
arb_ptr t, u;
if (arb_contains_nonpositive(a))
{
_arb_vec_indeterminate(res, len);
return;
}
hlen = FLINT_MIN(hlen, len);
z = _acb_vec_init(len);
t = _arb_vec_init(len);
u = _arb_vec_init(len);
acb_init(cs);
acb_init(ca);
/* use reflection formula */
if (arf_sgn(arb_midref(h)) < 0 && arb_is_one(a))
{
/* zeta(s) = (2*pi)**s * sin(pi*s/2) / pi * gamma(1-s) * zeta(1-s) */
arb_t pi;
arb_ptr f, s1, s2, s3, s4;
arb_init(pi);
f = _arb_vec_init(2);
s1 = _arb_vec_init(len);
s2 = _arb_vec_init(len);
s3 = _arb_vec_init(len);
s4 = _arb_vec_init(len);
arb_const_pi(pi, prec);
/* s1 = (2*pi)**s */
arb_mul_2exp_si(pi, pi, 1);
_arb_poly_pow_cpx(s1, pi, h, len, prec);
arb_mul_2exp_si(pi, pi, -1);
/* s2 = sin(pi*s/2) / pi */
arb_set(f, h);
arb_one(f + 1);
arb_mul_2exp_si(f, f, -1);
arb_mul_2exp_si(f + 1, f + 1, -1);
_arb_poly_sin_pi_series(s2, f, 2, len, prec);
_arb_vec_scalar_div(s2, s2, len, pi, prec);
/* s3 = gamma(1-s) */
arb_sub_ui(f, h, 1, prec);
arb_neg(f, f);
arb_set_si(f + 1, -1);
_arb_poly_gamma_series(s3, f, 2, len, prec);
/* s4 = zeta(1-s) */
arb_sub_ui(f, h, 1, prec);
arb_neg(f, f);
acb_set_arb(cs, f);
acb_one(ca);
_acb_poly_zeta_cpx_series(z, cs, ca, 0, len, prec);
for (i = 0; i < len; i++)
arb_set(s4 + i, acb_realref(z + i));
for (i = 1; i < len; i += 2)
arb_neg(s4 + i, s4 + i);
_arb_poly_mullow(u, s1, len, s2, len, len, prec);
_arb_poly_mullow(s1, s3, len, s4, len, len, prec);
_arb_poly_mullow(t, u, len, s1, len, len, prec);
/* add 1/(1-(s+t)) = 1/(1-s) + t/(1-s)^2 + ... */
if (deflate)
{
arb_sub_ui(u, h, 1, prec);
arb_neg(u, u);
arb_inv(u, u, prec);
for (i = 1; i < len; i++)
arb_mul(u + i, u + i - 1, u, prec);
_arb_vec_add(t, t, u, len, prec);
}
arb_clear(pi);
_arb_vec_clear(f, 2);
_arb_vec_clear(s1, len);
_arb_vec_clear(s2, len);
_arb_vec_clear(s3, len);
_arb_vec_clear(s4, len);
}
else
{
acb_set_arb(cs, h);
acb_set_arb(ca, a);
_acb_poly_zeta_cpx_series(z, cs, ca, deflate, len, prec);
for (i = 0; i < len; i++)
arb_set(t + i, acb_realref(z + i));
}
/* compose with nonconstant part */
arb_zero(u);
_arb_vec_set(u + 1, h + 1, hlen - 1);
_arb_poly_compose_series(res, t, len, u, hlen, len, prec);
_acb_vec_clear(z, len);
_arb_vec_clear(t, len);
_arb_vec_clear(u, len);
acb_init(cs);
acb_init(ca);
}
void Lib_Arb_Set_Si(ArbPtr x, int32_t a)
{
arb_set_si( (arb_ptr) x, a);
}
