>: float
<br/><i>Default</i>: 1e-5
<br/><br> An internal tolerance variable for the Lanczos method. The smaller, the more
 precisely the exponential is calculated, and also the bigger the dimension
 of the Krylov subspace needed to perform the algorithm. One should carefully
 make sure that this value is not too big, or else the evolution will be
 wrong.

</p><hr width='30%' align='left'/>


<p><b><a name='TDMaximumIter'></a>TDMaximumIter</b>
<br/><i>Section</i>: Time-Dependent::Propagation
<br/><i>Type</i>