Fractional cross intersecting families

Rogers Mathew, Ritabrata Ray, Shashank Srivastava

Let $\mathcal{A}=\{A_1,...,A_p\}$ and $\mathcal{B}=\{B_1,...,B_q\}$ be two families of subsets of $[n]$ such that for every $i\in [p]$ and $j\in [q]$, $|A_{i}\cap B_{j}|= \…