Dictionary - Definition of EQN

Specialty Definition: EQN

Domain	Definition
Computing	Eqn Language for typesetting mathematics. "A System for Typesetting Mathematics", B.W. Kernighan and L.L. Cherry, CACM 18(3):151-157 (Mar 1975). Source: The Free On-line Dictionary of Computing.
Wikipedic	Part of the troff suite of Unix document layout tools, eqn is a preprocessor that formats equations for printing. A similar program, neqn, accepted the same input as eqn, but produced output tuned to look better in nroff. (references)
Source: compiled by the editor from various references; see credits.		Top

Abbreviations & Acronyms: EQN

The following table is compiled from various sources, across various languages. When English abbreviations or acronyms come from a non-English source, this is noted.
Entry	Source	Expression	Field
EQN	English	European Quality Newspapers	N/A
Source: compiled by the editor, based on several corpora (additional references).				Top

Extended Definition: Eqn

eqn

Part of the troff suite of Unix document layout tools, eqn is a preprocessor that formats equations for printing. A similar program, neqn, accepted the same input as eqn, but produced output tuned to look better in nroff. The eqn program was created in 1974 by Brian Kernighan and Lorinda Cherry.

The input language used by eqn allows the user to write mathematical expressions in much the same way as they would be spoken aloud. The eqn language is similar to the mathematical component of TeX, which appeared several years later, but is simpler and less complete.

An independent compatible implementation of the eqn preprocessor has been developed by GNU as part of groff, the GNU version of troff.

Syntax examples

Here is how some of the examples from [1] would be written in eqn (with equivalents in TeX for comparison):

TeX	eqn	formula
$a2$	a sup 2	$a 2$
$\sum_{k=1}N k2$	sum from { k = 1 } to N { k sup 2 }	$\sum_{k=1}N k2$

References

Brian W. Kernighan and Lorinda L. Cherry. A System for Typesetting Mathematics, Communications of the ACM 18 (1975), 151–157.

External links

Source: adapted by the editor from Wikipedia, the free encyclopedia; from the article "Eqn". Image Credit.

Topics by Level of Interest: EQN
Topics sorted by level of Interest	Level (1=low, 600=high)	Topics sorted Alphabetically	Level (1=low, 600=high)
Eqn	4	Eqn	4
Source: the editor, created by/for EVE to gauge likely levels of human interest in linguistically triggered topics (compiled across various sources, such as Wikipedia and specialty expression glosses).

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