="../../../../fig/mpt/modules/solvers/mpt_call_lcp45.png" alt="../../../../fig/mpt/modules/solvers/mpt_call_lcp45.png"></p>
        which gives
        <p class="programlistingindent"><img src="../../../../fig/mpt/modules/solvers/mpt_call_lcp46.png" alt="../../../../fig/mpt/modules/solvers/mpt_call_lcp46.png"></p>
        where the index sets <tt>Bc</tt>, <tt>Nc</tt> denote the columns from which factored system is built. 
        The factored submatrix <img src="../../../../fig/mpt/modules/solvers/mpt_call