ently.  In practice, for most
 purposes this is not necessary, except perhaps in the first
 iterations. This variable holds the number of propagation steps
 for which the propagation is done self-consistently.
<br><br>
 The special value <tt>all_steps</tt> forces self-consistency to
 be imposed on all propagation steps. A value of 0 means that
 self-consistency will not be imposed.  The default is 3, which
 means that self-consistency is only enforced during the first three
 steps.

<br/><i>Options</i>:
<ul