 to determine perturbation
     ... % solve_simple_chol.m
     'chol_ordering', {1, 'M', [0, 1]}, ... % use symamd for sparse matrices before Cholesky factor.?
     ... % solvers
     'luk3_diag', {1., 'R', [0, Inf]} ...  % diagonal of the (2,2)-block in Luksan 3 preconditioner
   );</pre><p><html><a  href="#top_of_page">Back to Top</a> </html></p>
         <h2>Appendix 3, Definition of BMI input format<a name="19"></a></h2>
         <p>Use PMI input format described below with maximum degree 2.</p>
       