Function weighted_inner_product

utils/src/ff.rs:50–60

Weighted inner product of 2 vectors `a` and `b` with weight `w`. Calculated as `\sum_{i=0}(a_i * b_i * w^{i+1})`

(a: &[F], b: &[F], w: &F)

/// Weighted inner product of 2 vectors `a` and `b` with weight `w`. Calculated as `\sum_{i=0}(a_i * b_i * w^{i+1})`
pub fn weighted_inner_product<F: Field>(a: &[F], b: &[F], w: &F) -> F {
    let size = a.len().min(b.len());

    let mut weights = powers(w, size as u32 + 1);
    weights.remove(0);

    let product = cfg_into_iter!(0..size).map(|i| a[i] * b[i] * weights[i]);

    let zero = F::zero;
    cfg_iter_sum!(product, zero)
}

/// Weighted inner product of the vector `n` with itself. Calculated as `\sum_{i=0}(n_i * n_i * w^{i+1})`
pub fn weighted_norm<F: Field>(n: &[F], w: &F) -> F {