2 problems

Let $E$ be a finite set, let $\mu$ be a unitary connectivity function on $E$, and let $\mu\downarrow X$ denote the connectivity-function minor obtained by the operation defined in…

Let $E$ be a finite set, and let $u$ be the connectivity function on ${a,b,c,d}$ defined by … … and with all other values determined by symmetry. A connectivity function is unitar…