functional

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functional

1. Psychol
a. relating to the purpose or context of a behaviour
b. denoting a psychosis such as schizophrenia assumed not to have a direct organic cause, like deterioration or poisoning of the brain
2. Maths a function whose domain is a set of functions and whose range is a set of functions or a set of numbers
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Functional

 

a mathematical concept originating in the calculus of variations, where it denotes a variable that depends on one or more functions or curves. Examples of functionals are the area bounded by a closed curve of a given length and the work of a force field along a curve. As functional analysis developed, the term “functional” acquired the more general sense of a numbervalued function defined on a linear space.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

functional

[′fəŋk·shən·əl]
(computer science)
In a linear programming problem involving a set of variables xj , j = 1, 2, …, n, a function of the form c1 x1+ c2 x2+ ⋯ + cn xn (where the cj are constants) which one wishes to optimize (maximize or minimize, depending on the problem) subject to a set of restrictions.
(mathematics)
Any function from a vector space into its scalar field.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

functional

(1)
Working correctly.

functional

(2)
Pertaining to functional programming.

functional

(3)
This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)
References in periodicals archive ?
Under the collaboration, FivePrime will provide Biosite access to selected functional disease targets for use in developing diagnostics.
Some symptoms, such as diarrhea and fever, are rare in functional disease. Occasional vomiting is seen in two-thirds of children with functional disease, pallor (paleness) in haft, and 20% have headaches and sleepiness.
The L/M test was abnormal (ratio greater than 0.030) in 52 of 120 patients with organic disease (small bowel, colonic, or other diseases) and in 13 of 141 patients with functional disease (mainly irritable bowel syndrome).
The first study indicated that the exclusion of celiac disease is not routinely obtained in patients with chronic constipation, and there is no general recommendation to routinely test for celiac disease despite the definition of functional diseases. Celiac disease occurs in children with chronic constipation in the ratio of 1:28.

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