Line 9:
Line 9:
=== 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.
+
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.