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| <math>(S^L)_{ij} ~=~ \prod_{x \in X} S_{ix}^{L_{xj}}</math>
 
| <math>(S^L)_{ij} ~=~ \prod_{x \in X} S_{ix}^{L_{xj}}</math>
 
|}
 
|}
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In other words, <math>(S^L)_{ij}\!</math> goes to zero as soon as we find an <math>x \in X</math> such that <math>S_{ix} = 0\!</math> and <math>L_{xj} = 1.\!</math>
    
===Commentary on Selection 12===
 
===Commentary on Selection 12===
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