>\[ w(A) = \begin{bmatrix} 19 &amp; 27 &amp; 52 &amp; 81 &amp;
95 &amp; 33 \end{bmatrix}^{\top} \! \! \! , \]</span> an array of integer column
indices for the values, <span class="math display">\[ v(A) = \begin{bmatrix} 1 &amp; 2 &amp; 4 &amp; 1 &amp; 3 &amp;
4 \end{bmatrix} \! , \]</span> and an array of integer indices indicating
where in <span class="math inline">\(w(A)\)</span> a given rowâ€™s values start, <span class="math display">\[ u(A) = \begin{bmatrix}
1 &amp; 3 &amp; 3 &amp; 4 &amp; 7 \end