h inline">\(u(A)\)</span> correspond to the third element of
<span class="math inline">\(w(A)\)</span>, which is <span class="math inline">\(52\)</span>. The values <span class="math inline">\((w(A), \, v(A), \, u(A))\)</span> are
sufficient to reconstruct <span class="math inline">\(A\)</span>.</p>
<p>The values are structured so that there is a real value and integer
column index for each non-zero entry in the array, plus one integer
for each row of the matrix, plus one for padding. There is also
underlyi