Assertion: matrix | /r/HasAspect | only one column
Facets:
Source sentences:
text: A matrix that has only one column is called a "column vector.
text: This matrix has 3 rows and 3 columns: m=n=3.
text: This matrix is a 3x3 matrix because it has three rows and three columns.
text: A matrix that has only one column is called a "column vector.