rmulated as an LMI. For more details, see Example 7.2 from the PENLAB
            paper (directory <tt>tex/penlab_paper</tt>). Input data for many examples can be found in sub-directory <tt>GEO</tt>. Example:
         </p><pre>solve_tto('GEO/t3x3.geo');</pre><p><b>Truss topology optimization with a buckling constraint</b></p>
         <p>Go to directory <tt>applications/TTObuckling</tt>. Solve the truss topology optimization problem with a constraint on global stability (buckling). This leads to a nonlinear