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<H3><A NAME="SECTION002084400000000000000">
Convergence</A>
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The standard deviation of the residual is decreasing until no more
significant structures are found. The convergence can be estimated
from the residual. The algorithm stops when:
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<!-- MATH: \begin{eqnarray}
\frac{ \sigma_{{R}^{(n-1)}} - \sigma_{{R}^{(n)}}}
{ \sigma_{{R}^{(n)}}} < \epsilon
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{ \sigma_{{R}^{(n)}}} < \epsilon$"></TD>
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(14.121)</TD></TR>
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<ADDRESS>
<I>Petra Nass</I>
<BR><I>1999-06-15</I>
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