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    <div class="panel-heading codesum"><span class="anchor" id="boundprocedure-solve~9"></span><h3>procedure, public :: <strong>solve</strong>  => ns_solve         
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                  <h3>
    private  subroutine ns_solve(this, fcn, x, fvec, ib, err)  
</h3>
  <p>Applies Newton's method in conjunction with a backtracking type
line search to solve N equatio