Assertion: matrix's entry | /r/HasProperty | defined
Facets:
value: sometimes
type: TEMPORAL
Source sentences:
text: If R is a binary relation between the finite indexed sets X and Y (so R ⊆ X×Y), then R can be represented by the logical matrix M whose row and column indices index the elements of X and Y, respectively, such that the entries of M are defined by:
text: Sometimes, the entries of a matrix can be defined by a formula such as a i,j = f(i, j).