Function binomial_mul 

pub fn binomial_mul<F: Field, R: Algebra<F> + Algebra<R2>, R2: Algebra<F>, const D: usize>(
    a: &[R; D],
    b: &[R2; D],
    res: &mut [R; D],
    w: F,
)

Multiply two vectors representing elements in a binomial extension.