For instance, the main diagonal of the 4-by-4 matrix above contains the elements "a"11 = 9, "a"22 = 11, "a"33 = 4, "a""44" = 10.
Например, главная диагональ 4х4 матрицы на рисунке содержит элементы "a"11 = 9, "a"22 = 11, "a"33 = 4, "a""44" = 10.