Analysis of information sources in references of the Wikipedia article "Zero matrix" in English language version.
We have a zero matrix in which aij = 0 for all i, j. ... We shall write it O.
The neutral element for addition is called the zero matrix, for all of its entries are zero.
The zero matrix represents the zero transformation 0, having the property 0(v) = 0 for every vector v ∈ V.