ocedure, public :: <strong>get_gradient_tolerance</strong>  => es_get_grad_tol         
    </h3></div>
    <ul class="list-group">
        <li class="list-group-item">
                  <h3>
    private pure function es_get_grad_tol(this) result(x)  
</h3>
  <p>Gets the convergence on slope of the gradient vector
tolerance.</p>

  <h4>Arguments</h4>
      <table class="table table-striped varlist">
    <thead>
      <tr>
        <th>Type</th>
<th>Intent</th><th>Optional</th>        <th>Attributes</th>
    