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by HelloNurse
1452 days ago
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A product type, named after Cartesian product, contains other objects of various types, but it is none of A, B or C itself. If types A, B and C have respectively a, b and c distinct values, their sum type has a+b+c values (each value of each type is allowed) and their product type has abc values (the part of the value that belongs to each type can be chosen independently). |
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