Skip to main content

reduction machine

reduction machine A machine that evaluates expressions by successively reducing all component subexpressions until only simple terms representing data values remain. For each expression that is not a simple data value, a set of rules define what should be substituted when that expression appears. The machine operates by matching each subexpression of the expression currently being evaluated with its appropriate rule, and substituting as specified by that rule. This process of expression substitution continues until only simple data values remain, representing the value of the original expression.

All subexpressions can be matched and substituted concurrently, and thus there is the potential for a high degree of parallelism. A major objective of reduction machines is to exploit this parallelism.

Reduction machines represent one of the major examples of non von Neumann architecture, and are of considerable research interest. Traditional imperative programming languages are unsuited to reduction machines, so declarative languages are employed.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"reduction machine." A Dictionary of Computing. . Encyclopedia.com. 9 Dec. 2018 <https://www.encyclopedia.com>.

"reduction machine." A Dictionary of Computing. . Encyclopedia.com. (December 9, 2018). https://www.encyclopedia.com/computing/dictionaries-thesauruses-pictures-and-press-releases/reduction-machine

"reduction machine." A Dictionary of Computing. . Retrieved December 09, 2018 from Encyclopedia.com: https://www.encyclopedia.com/computing/dictionaries-thesauruses-pictures-and-press-releases/reduction-machine

Learn more about citation styles

Citation styles

Encyclopedia.com gives you the ability to cite reference entries and articles according to common styles from the Modern Language Association (MLA), The Chicago Manual of Style, and the American Psychological Association (APA).

Within the “Cite this article” tool, pick a style to see how all available information looks when formatted according to that style. Then, copy and paste the text into your bibliography or works cited list.

Because each style has its own formatting nuances that evolve over time and not all information is available for every reference entry or article, Encyclopedia.com cannot guarantee each citation it generates. Therefore, it’s best to use Encyclopedia.com citations as a starting point before checking the style against your school or publication’s requirements and the most-recent information available at these sites:

Modern Language Association

http://www.mla.org/style

The Chicago Manual of Style

http://www.chicagomanualofstyle.org/tools_citationguide.html

American Psychological Association

http://apastyle.apa.org/

Notes:
  • Most online reference entries and articles do not have page numbers. Therefore, that information is unavailable for most Encyclopedia.com content. However, the date of retrieval is often important. Refer to each style’s convention regarding the best way to format page numbers and retrieval dates.
  • In addition to the MLA, Chicago, and APA styles, your school, university, publication, or institution may have its own requirements for citations. Therefore, be sure to refer to those guidelines when editing your bibliography or works cited list.