Cofinal Subset
# Definition
Let $A$ be a Partial Ordering and let $B \subset A$. We say $B$ is a Cofinal Subset of $A$ if $\forall a \in A$, $\exists b \in B$ s.t. $a \leq b$.
Search
Let $A$ be a Partial Ordering and let $B \subset A$. We say $B$ is a Cofinal Subset of $A$ if $\forall a \in A$, $\exists b \in B$ s.t. $a \leq b$.