Word:

partial function

partial function - A function which is not defined for all arguments of its input type. E.g.

f(x) = 1/x if x /= 0.

The opposite of a total function. In denotational semantics, a partial function

f : D -> C

may be represented as a total function

ft : D' -> lift(C)

where D' is a superset of D and

ft x = f x if x in D ft x = bottom otherwise

where lift(C) = C U bottom. Bottom (LaTeX \perp) denotes "undefined".
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parti-color
parti-colored
partial
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partial breach
partial correlation
partial denture
partial derivative
Partial differential
partial differential equation
Partial Differential Equation LANguage
Partial differentials
partial eclipse
partial equivalence relation
partial evaluation
Partial fractions
-- partial function --
partial key
partial ordering
Partial Response Maximum Likelihood
partial tone
Partial tones
partial veil
partial verdict
Partialism
Partialist
Partiality
Partialize
Partially
partially ordered set
partialness
Partibility
Partible
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