3rd EAU Baltic Meeting, Talin, Ermenistan, 27 Mayıs 2016, cilt.15, (Özet Bildiri)
We use Vinogradov's method to prove equidistribution of a spin symbol governing the $16$-rank of class groups of quadratic number fields $\mathbb{Q}(\sqrt{-2p})$, where $p \equiv 1 \bmod 4$ is a prime.