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=== Rank ===
 
=== Rank ===
This only works however when the ingredients are full rank, that is no ingredient can be defined as a sum of other ingredients. An added complexity is that one has to determine the non-negative rank to be sure of this.
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This only works however when the ingredients are full rank, that is no ingredient can be defined as a sum of other ingredients. An added complexity is that one has to determine the [https://en.wikipedia.org/wiki/Nonnegative_rank_(linear_algebra) non-negative rank] to be sure of this.
    
If the ingredients are NOT full rank, the product becomes underdetermined.
 
If the ingredients are NOT full rank, the product becomes underdetermined.
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