pre-image

pre-image

[¦prē′im·ij]
(mathematics)
For a point y in the range of a function ƒ, the set of points x in the domain of ƒ for which ƒ(x) = y.
For a subset A of the range of a function ƒ, the set of points x in the domain of ƒ for which ƒ(x) is a member of A. Also known as inverse image.
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References in periodicals archive ?
In terms of cylinders this means that the pre-image of every cylinder [[u].
such that for every t [greater than or equal to] 3 the pre-images of the word [u.
2] and [mu] is the pre-image of V under f then [mu] is an Q-anti fuzzy left h-ideal of [R.
2] then the Pre-image of [mu] under f then [mu] is the Q-anti fuzzy in [R.
If [sigma] is not surjective, not every element in K has a pre-image with respect to [sigma], i.
rho]] denote the pre-image of the element F [member of] [K.
The chips feature strong enhancement of pre-image processing in order to increase conversion accuracy even in complex image environments.
Measure an angle of the image (the dilated polygon) and the corresponding angle on the pre-image (the original polygon).
XBM provides a Snapshot Utilities feature that permits holding pre-image copies of DB2 pages in cache.
Utilizing EMC TimeFinder, Hitachi Remote Copy, IBM Ramac Virtual Array (RVA) or STK Shared Virtual Array (SVA)(TM), XBM Enterprise Snapshot reduces the need for mainframe storage to hold pre-images of data blocks.