Q = augmentPoset P
Q = augmentPoset(P, a, b)
This method simply creates a new poset $Q$ with the minimal element $a$ and the maximal element $b$. If $a$ and $b$ are unspecified, the elements $0$ and $1$ are used, respectively.
The object augmentPoset is a method function.
The source of this document is in Posets.m2:3096:0.