Stub vectors and classifications of various lengths---%
as well as the means of producing arbitrary lengths---%
are provided for convenience and testing.
Ten n-vectors with each element containing the value~$0$ are
provided.
Ten n-classes generated from the respective n-vectors are provided.
\ref{_n-vector_} generates vector constants of length~$n$ where each
element is assigned the provided value (or~$0$ if unspecified).
0