Function f_j1f

pub fn f_j1f(x: f32) -> f32

Bessel of the first kind of order 1

Max ULP 0.5

Note about accuracy:

• Close to zero Bessel have tiny values such that testing against MPFR must be done exactly in the same precision, since any nearest representable number have ULP > 0.5. For example J1(0.000000000000000000000000000000000000023509886) in single precision have an error at least 0.72 ULP for any number with extended precision, that would be represented in f32.