int
f_thsh_shift(arb_t max, const arb_t t, params_t * p, slong prec)
{
acb_t z;
acb_init(z);
arb_set(acb_realref(z), t);
arb_set_d(acb_imagref(z), .7);
acb_sinh(z, z, prec);
acb_tanh(z, z, prec);
acb_abs(max, z, prec);
acb_clear(z);
return 1;
}
int
f_aj(arb_t m, const arb_t t, params_t * p, slong prec)
{
slong k;
acb_t z, zu;
arb_t abs;
arb_init(abs);
acb_init(z);
acb_init(zu);
arb_const_pi(abs, prec);
arb_mul_2exp_si(abs, abs, -2); /* Pi/4 */
arb_set(acb_realref(z), t);
arb_set(acb_imagref(z), abs);
acb_sinh(z, z, prec);
arb_mul_2exp_si(abs, abs, 1); /* Pi/2 */
acb_mul_arb(z, z, abs, prec);
acb_tanh(z, z, prec);
arb_one(m);
for (k = 0; k < p->len; k++)
{
acb_sub(zu, z, p->z + k, prec);
if (acb_contains_zero(zu))
{
arb_clear(abs);
acb_clear(zu);
acb_clear(z);
return 0;
}
acb_abs(abs, zu, prec);
arb_mul(m, m, abs, prec);
}
arb_inv(m, m, prec);
arb_clear(abs);
acb_clear(zu);
acb_clear(z);
return 1;
}
int main()
{
slong iter;
flint_rand_t state;
flint_printf("asinh....");
fflush(stdout);
flint_randinit(state);
for (iter = 0; iter < 1000 * arb_test_multiplier(); iter++)
{
acb_t x, a, b;
slong prec1, prec2;
prec1 = 2 + n_randint(state, 1000);
prec2 = prec1 + 30;
acb_init(x);
acb_init(a);
acb_init(b);
acb_randtest_special(x, state, 1 + n_randint(state, 1000), 2 + n_randint(state, 100));
acb_randtest_special(a, state, 1 + n_randint(state, 1000), 2 + n_randint(state, 100));
acb_randtest_special(b, state, 1 + n_randint(state, 1000), 2 + n_randint(state, 100));
acb_asinh(a, x, prec1);
acb_asinh(b, x, prec2);
/* check consistency */
if (!acb_overlaps(a, b))
{
flint_printf("FAIL: overlap\n\n");
flint_printf("x = "); acb_printd(x, 15); flint_printf("\n\n");
flint_printf("a = "); acb_printd(a, 15); flint_printf("\n\n");
flint_printf("b = "); acb_printd(b, 15); flint_printf("\n\n");
abort();
}
/* check sinh(asinh(x)) = x */
acb_sinh(b, b, prec1);
if (!acb_contains(b, x))
{
flint_printf("FAIL: functional equation\n\n");
flint_printf("x = "); acb_printd(x, 15); flint_printf("\n\n");
flint_printf("b = "); acb_printd(b, 15); flint_printf("\n\n");
abort();
}
acb_asinh(x, x, prec1);
if (!acb_overlaps(a, x))
{
flint_printf("FAIL: aliasing\n\n");
flint_printf("a = "); acb_printd(a, 15); flint_printf("\n\n");
flint_printf("x = "); acb_printd(x, 15); flint_printf("\n\n");
abort();
}
acb_clear(x);
acb_clear(a);
acb_clear(b);
}
flint_randclear(state);
flint_cleanup();
flint_printf("PASS\n");
return EXIT_SUCCESS;
}
