Disjoint Cross Intersecting Families

Nuttanon Songsuwan, Supida Sengsamak, Nutchapol Jeerawattana +2

For positive integers $n$ and $r$ such that $r\le \lfloor n/2\rfloor$, let $X$ be a set of $n$ elements and let $\left(\genfrac{}{}{0ex}{}{X}{r}\right)$ be the family of all $r$-subsets of $X$. Two sub-fa…