Assertion: matrix's element | /r/LocatedNear | vertical lines
Facets:
value: at their left
type: LOCATION
value: at right
type: LOCATION
Source sentences:
text: Matrices are often represented as arrays of elements surrounded by vertical lines at their left and right, or square brackets at the left and right.
text: Matrices are often represented as arrays of elements surrounded by vertical lines at their left and right, or square brackets at the left and right.