Maximal fractional cross-intersecting families

Hongkui Wang, Xinmin Hou

Given an irreducible fraction $\frac{c}{d}\in [0,1]$, a pair $(\mathcal{A},\mathcal{B})$ is called a $\frac{c}{d}$-cross-intersecting pair of $2^{[n]}$ if $\mathcal{A}, \mathcal{B…