Editing Reduce (computer algebra system) (section)

{{Short description|none}}
{{Infobox software
| name = REDUCE
| logo = REDUCE.png
| screenshot = REDUCE Screenshot 1.png
| caption = CSL REDUCE on Microsoft Windows
| developer = Anthony C. Hearn et al.
| released = {{Start date and age|1968}}
| latest release version = {{Latest stable software release/REDUCE}}
| repo = {{URL|https://sourceforge.net/projects/reduce-algebra/}}
| programming language = Standard Lisp
| operating system = [[Cross-platform]]
| genre = [[Computer algebra system]]
| license = [[Modified BSD license]]
| website = {{URL|https://reduce-algebra.sourceforge.io/}}
}}

'''REDUCE''' is a general-purpose [[computer algebra system]] originally geared towards applications in physics.

The development of REDUCE was started in 1963 by [[Anthony C. Hearn]]; since then, many scientists from all over the world have contributed to its development.<ref name=":0">{{Cite book |last=Hearn |first=Anthony C. |url=https://www.researchgate.net/publication/260255562 |title=Algorithmic Algebra and Logic: Proceedings of the A3L 2005, April 3-6, Passau, Germany Conference in Honor of the 60th Birthday of Volker Weispfenning |date=2005 |publisher=Universitätsbibliothek Passau |chapter=REDUCE: The First Forty Years}}</ref> REDUCE was [[Open-source software|open-sourced]] in December 2008 and is available for free under a [[modified BSD license]] on [[SourceForge]]. Previously it had cost $695.

REDUCE is written entirely in its own [[Lisp (programming language)|Lisp]] dialect called Standard Lisp,<ref>{{Cite journal |last1=Marti |first1=J. |last2=Hearn |first2=A. C. |last3=Griss |first3=M. L. |last4=Griss |first4=C. |date=1979-10-01 |title=Standard LISP report |url=https://dl.acm.org/doi/10.1145/953997.953999 |journal=SIGPLAN Not. |volume=14 |issue=10 |pages=48–68 |doi=10.1145/953997.953999 |issn=0362-1340}}</ref> expressed in an [[ALGOL]]-like syntax called RLISP that is also used as the basis for REDUCE's user-level language.

Implementations of REDUCE are available on most variants of [[Unix]], [[Linux]], [[Microsoft Windows]], or [[Apple Macintosh]] systems by using an underlying [[Portable Standard Lisp|Portable Standard Lisp (PSL)]] or Codemist Standard Lisp (CSL) implementation.  CSL REDUCE offers a [[graphical user interface]]. REDUCE can also be built on other Lisps, such as [[Common Lisp]].