e
\(G_f\) variables indicate if the persistence target for feature
\(f\) is met.</p>
<p>Now that we have defined all the data and variables, we can formulate
the problem. For convenience, let the symbol used to denote each set also
represent its cardinality (e.g. if there are ten features, let \(F\)
represent the set of ten features and also the number ten).</p>
<p>$$
  \mathrm{Maximize} \space \sum_{f = 0}^{F} G_f W_f \space
  \mathrm{(eqn \space 1a)} \\
  \mathrm{Subject \space to}
  \sum_{i = 0}^{I} C_i 