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displacement operator[dis′plās·mənt ‚äp·ə‚rād·ər]
A difference operator, denoted E, defined by the equation Ef (x) = ƒ(x + h), where h is a constant denoting the difference between successive points of interpolation or calculation. Also known as forward shift operator.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.