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Note that a factorial code causes
non-maximal and therefore
for all methods with
except for rare cases (such as if there are equally probable
different input patterns).
This means that with a given problem
there is some need for
parameter tuning of the relative weighting factors,
due to the possibility that the various constraints may not be
satisfiable simultaneously (see the footnote of section 4.4).
The method in the next section avoids this necessity
for parameter tuning by replacing the term for variance
maximization by a predictor-based term for conditioned variance
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