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- As we have already mentioned, the case of several parameters is
treated by taking several moments.
- Now our moment errors are described by a full second moment
matrix for off diagonal terms come from
which is
nonzero in general.
- It is conventional to ignore correlations:
The expansion in terms of 
of
or an angular decay distribution is typical example.
The expansion functions 
are orthonormal, so
Geoffrey Fox, Northeast Parallel Architectures Center at Syracuse University, gcf@npac.syr.edu