The zero matrix formula_3 in formula_4 is the matrix with all entries equal to formula_5, where formula_5 is the additive identity in K.:formula_7The zero matrix is the additive identity in formula_4.
Она обозначается как formula_2 или formula_3 или formula_4formula_5Нулевая матрица, и только она, имеет ранг 0.