Duad
= Duad
A duad is an unordered pair of distinct points. On a six-point set there are $\binom62=15$ duads. They are the edges of the complete graph and are grouped into <synthemes>.
= Duad
A duad is an unordered pair of distinct points. On a six-point set there are $\binom62=15$ duads. They are the edges of the complete graph and are grouped into <synthemes>.