  Let $\mu$ be a strong limit singular cardinal. We prove that if $2^{\mu} >
\mu^+$ then $\binom{\mu^+}{\mu}\to \binom{\tau}{\mu}_{<{\rm cf}(\mu)}$ for
every ordinal $\tau<\mu^+$. We obtain an optimal positive relation under $2^\mu
= \mu^+$, as after collapsing $2^\mu$ to $\mu^+$ this positive relation is
preserved.
