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principal type

   Also found in: Wikipedia 0.04 sec.
principal type - The most general type of an expression. For example, the following are all valid types for the lambda abstraction (\ x . x):

Int -> Int Bool -> Bool (a->b) -> (a->b)

but any valid type will be an instance of the principal type: a -> a. An instance is derived by substituting the same type expression for all occurences of some type variable. The principal type of an expression can be computed from those of its subexpressions by Robinson's unification algorithm.


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? Mentioned in ? References in periodicals archive
 
However, the principal type of rigour that the book inspires is the type known as mortis.
The nature of the principal type 1 interferon-producing cells in human blood.
It is stated that "stained glass copied the formal vocabulary and subject matter of altarpieces, the principal type of sacred decoration" (30).
 
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