I was reading a book and it had the following sentence:
$A$ is a refinement of $B$
where $A$ and $B$ are sets.
What does this mean? Perhaps $A \subseteq B$ ?
I was reading a book and it had the following sentence:
$A$ is a refinement of $B$
where $A$ and $B$ are sets.
What does this mean? Perhaps $A \subseteq B$ ?