LaTeX

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"LATEX" redirects here. For the polymer, see Latex. For other uses, see Latex (disambiguation).
LaTeX
Original author(s)Leslie Lamport
Initial release1984; 40 years ago (1984)
Stable release
June 2024 LaTeX release[1] Edit this on Wikidata / 1 June 2024; 4 months ago (1 June 2024)
Repository
TypeTypesetting
LicenseLaTeX Project Public License (LPPL)
Websitewww.latex-project.org

LaTeX (/ˈlɑːtɛk/ ⓘ LAH-tek or /ˈleɪtɛk/ LAY-tek,[2][Note 1] often stylized as LaTeX) is a software system for typesetting documents.[3] LaTeX markup describes the content and layout of the document, as opposed to the formatted text found in WYSIWYG word processors like Google Docs, LibreOffice Writer and Microsoft Word. The writer uses markup tagging conventions to define the general structure of a document, to stylise text throughout a document (such as bold and italics), and to add citations and cross-references. A TeX distribution such as TeX Live or MiKTeX is used to produce an output file (such as PDF or DVI) suitable for printing or digital distribution.

LaTeX is widely used in

academia for the communication and publication of scientific documents and technical note-taking in many fields, owing partially to its support for complex mathematical notation.[4][5] It also has a prominent role in the preparation and publication of books and articles that contain complex multilingual materials, such as Arabic and Greek.[6] LaTeX uses the TeX typesetting program for formatting its output, and is itself written in the TeX macro
language.

LaTeX can be used as a standalone document preparation system, or as an intermediate format. In the latter role, for example, it is sometimes used as part of a pipeline for translating DocBook and other XML-based formats for PDF. The typesetting system offers programmable desktop publishing features and extensive facilities for automating most aspects of typesetting and desktop publishing, including numbering and cross-referencing of tables and figures, chapter and section headings, graphics, page layout, indexing and bibliographies.

Like TeX, LaTeX started as a writing tool for mathematicians and computer scientists, but even from early in its development, it has also been taken up by scholars who needed to write documents that include complex math expressions or non-Latin scripts,[7] such as Arabic, Devanagari and Chinese.[8]

LaTeX is intended to provide a high-level, descriptive markup language to utilize TeX more easily. TeX handles the document layout, while LaTeX handles the content side for document processing. LaTeX comprises a collection of TeX macros and a program to process LaTeX documents, and because the plain TeX formatting commands are elementary, it provides authors with ready-made commands for formatting and layout requirements such as chapter headings, footnotes, cross-references and bibliographies.

LaTeX was originally written in the early 1980s by Leslie Lamport at SRI International.[9] The current version is LaTeX2e, first released in 1994 but incrementally updated starting in 2015. This update policy replaced earlier plans for a separate release of LaTeX3, which had been in development since 1989.[10] LaTeX is free software and is distributed under the LaTeX Project Public License (LPPL).[11]

History

LaTeX was created in the early 1980s by

Stanford Research Institute (SRI). He needed to write TeX macros for his own use and thought that with a little extra effort, he could make a general package usable by others. Peter Gordon, an editor at Addison-Wesley, convinced him to write a LaTeX user's manual for publication (Lamport was initially skeptical that anyone would pay money for it);[12] it came out in 1986[3] and sold hundreds of thousands of copies.[12] Meanwhile, Lamport released versions of his LaTeX macros in 1984 and 1985. On 21 August 1989, at a TeX Users Group (TUG) meeting at Stanford, Lamport agreed to turn over maintenance and development of LaTeX to Frank Mittelbach. Frank Mittelbach, along with Chris Rowley and Rainer Schöpf, formed the LaTeX3 team; in 1994, they released LaTeX2e, the current standard version. LaTeX3 has since been cancelled with features intended for that version being back-ported to LaTeX2e since 2018.[10]

Typesetting system

LaTeX attempts to follow the design philosophy of

Cascading Style Sheets in styling HyperText Markup Language (HTML
) documents.

The LaTeX system is a

macro language
to develop custom macros such as new environments and commands. Such macros are often collected into packages, which could then be made available to address some specific typesetting needs such as the formatting of complex mathematical expressions or graphics (e.g., the use of the align environment provided by the amsmath package to produce aligned equations).

To create a document in LaTeX, a user first creates a file, such as document.tex, typically using a text editor.[14] The user then gives their document.tex file as input to the TeX program (with the LaTeX macros loaded), which prompts TeX to write out a file suitable for onscreen viewing or printing.[15] This write-format-preview cycle is one of the chief ways in which working with LaTeX differs from the What-You-See-Is-What-You-Get (WYSIWYG) style of document editing. It is similar to the code-compile-execute cycle known to computer programmers. Today, many LaTeX-aware editing programs make this cycle a simple matter through the pressing of a single key, while showing the output preview on the screen beside the input window. Some online LaTeX editors even automatically refresh the preview,[16][17][18] while other online tools provide incremental editing in-place, mixed in with the preview in a streamlined single window.[19]

Example

The example below shows the input to LaTeX and the corresponding output from the system:

Input Output 
\documentclass{article} % Starts an article
\usepackage{amsmath} % Imports amsmath
\title{\LaTeX} % Title

\begin{document} % Begins a document
  \maketitle
  \LaTeX{} is a document preparation system for
  the \TeX{} typesetting program. It offers
  programmable desktop publishing features and
  extensive facilities for automating most
  aspects of typesetting and desktop publishing,
  including numbering and cross-referencing,
  tables and figures, page layout,
  bibliographies, and much more. \LaTeX{} was
  originally written in 1984 by Leslie Lamport
  and has become the dominant method for using
  \TeX; few people write in plain \TeX{} anymore.
  The current version is \LaTeXe.

  % This is a comment, not shown in final output.
  % The following shows typesetting power of LaTeX:
  \begin{align}
    E_0 &= mc^2 \\
    E &= \frac{mc^2}{\sqrt{1-\frac{v^2}{c^2}}}
  \end{align} 
\end{document}

Pronouncing and writing "LaTeX"

The LaTeX wordmark, typeset with LaTeX's \LaTeX macro
Main article: TeX § Pronunciation and spelling

The characters 'T', 'E', and 'X' in the name come from the

Ancient Greek: τέχνη ('skill', 'art', 'technique'); for this reason, TeX's creator Donald Knuth promotes its pronunciation as /tɛx/ (tekh)[20] (that is, with a voiceless velar fricative as in Modern Greek, similar to the ch in loch). Lamport remarks that "TeX is usually pronounced tech, making lah-tech, lah-tech, and lay-tech the logical choices; but language is not always logical, so lay-tecks is also possible."[21]

The name is printed in running text with a typographical logo: LaTeX. In media where the logo cannot be precisely reproduced in running text, the word is typically given the unique capitalization LaTeX. Alternatively, the TeX, LaTeX[22] and XeTeX[23] logos can also be rendered via pure CSS and XHTML for use in graphical web browsers — by following the specifications of the internal \LaTeX macro.[24]

As a macro package, LaTeX provides a set of macros for TeX to interpret. There are many other macro packages for TeX, including Plain TeX,

AMSTeX, and ConTeXt
.

When TeX "compiles" a document, it follows (from the user's point of view) the following processing sequence: Macros → TeX → Driver → Output. Different implementations of each of these steps are typically available in TeX distributions. Traditional TeX will output a

DVI file, which is usually converted to a PostScript file. 2000, Hàn Thế Thành and others have written a new implementation of TeX called pdfTeX, which also outputs to PDF and takes advantage of features available in that format.[25] The XeTeX engine developed by Jonathan Kew, on the other hand, merges modern font technologies and Unicode with TeX.[26] LuaTeX is an extended version of pdfTeX using Lua as an embedded scripting language.[27]

There are also many editors for LaTeX, some of which are offline, source-code-based while others are online, partial-WYSIWYG-based. For more, see Comparison of TeX editors.

Compatibility and converters

LaTeX documents (*.tex) can be opened with any text editor. They consist of plain text and contain no hidden formatting codes or binary information. TeX documents can also be shared by rendering the LaTeX file to other formats such as OpenDocument, XML, or class (*.cls) files. LaTeX can also (and commonly is) rendered to PDF files using the LaTeX extension pdfLaTeX. LaTeX files containing Unicode text can be processed into PDFs with the inputenc package, or by the TeX extensions XeLaTeX and LuaLaTeX.

LaTeX has become the

Computer Algebra System
.

  • PNG
    , or HTML for embedding within a webpage.
  • KaTeX is a JavaScript library for converting LaTeX to HTML and MathML. It is developed by Khan Academy, and is among the fastest LaTeX to HTML converters.[36]

Licensing

LaTeX is typically distributed along with plain

BSD (FreeBSD, macOS, NetBSD, OpenBSD), Linux (Red Hat, Debian, Arch, Gentoo), Windows, DOS, RISC OS, AmigaOS, and Plan 9
.

Versions

Filename extension
.tex
Internet media type
application/x-latex [Note 2]
Initial release1994; 30 years ago (1994)
Latest release
LaTeX2e
1994; 30 years ago (1994)
Type of formatDocument file format

LaTeX2e is the current version of LaTeX, since it replaced LaTeX 2.09 in 1994.[38] As of 2020, LaTeX3, which started in the early 1990s, is under a long-term development project.[10] Planned features include improved syntax (separation of content from styling), hyperlink support, a new user interface, access to arbitrary fonts and a new documentation.[39] Some LaTeX3 features are available in LaTeX2e using packages,[40] and by 2020 many features have been enabled in LaTeX2e by default for a gradual transition.[10]

There are many commercial implementations of the entire TeX system. System vendors may add extra features like added

Scientific Word on Windows, and BaKoMa TeX
on Windows, Mac and Linux.

Many community-supported TeX distributions are available.

See also

  • LyX - GUI front-end for LaTeX

Notes

  1. ^ Also pronounced /ˈlɑːtɛx/ LAH-tekh or /ˈleɪtɛx/ LAY-tekh or /ˈleɪtɛks/LAY-tex.
  2. ^ Unregistered media type

References

  1. ^ "https://www.latex-project.org/news/latex2e-news/". LaTeX. Retrieved 29 June 2024. {{cite web}}: External link in |title= (help)
  2. ^ "An introduction to LaTeX". LaTeX project. Retrieved 18 April 2016.
  3. ^
    OCLC 12550262
    .
  4. ^ "What are TeX, LaTeX and friends?".
  5. ^
    S2CID 201097782
    .
  6. ^ Markin, Pablo (1 November 2017). "LaTeX, Open Source Software, Facilitates the Adoption of Open Access by Authors, Repositories and Journals". OpenScience. Retrieved 5 November 2017.
  7. ^ "Multilingual typesetting on Overleaf using babel and fontspec". Retrieved 2022-04-09.
  8. ^ "Chinese". www.overleaf.com. Retrieved 2020-12-30.
  9. ^ Leslie Lamport (April 23, 2007). "The Writings of Leslie Lamport: LaTeX: A Document Preparation System". Leslie Lamport's Home Page. Retrieved 2007-04-27.
  10. ^ a b c d "Quo vadis LaTeX(3) Team — A look back and at the upcoming years" (PDF). www.latex-project.org. Retrieved 2023-06-09.
  11. ^ "LaTeX - A document preparation system". www.latex-project.org. Retrieved 2019-07-20.
  12. ^ a b Lamport, Leslie (2024-04-29). "My Writings" (PDF). pp. 48–49. Archived (PDF) from the original on 2024-06-09. Retrieved 2024-06-09.
  13. ^ The design of LaTeX owes something to earlier markup systems such as Scribe.
  14. ^ Van Dyke, Jackson. "Getting started with LaTeX and Vim" (PDF). Retrieved 21 February 2024.
  15. ^ PDF output is common, but TeX can output other formats such as DVI ("Device independent" format). See below for more detail about outputs.
  16. ^ "Overleaf".
  17. ^ "Seeveeze".
  18. ^ "LaTeX Base".
  19. ^ "Authorea".
  20. ^ Donald E. Knuth, The TeXbook, Addison–Wesley, Boston, 1986, p. 1.
  21. ^ Lamport (1994), p 5
  22. ^ O'Connor, Edward. "TeX and LaTeX logo POSHlets". Archived from the original on 2007-10-11. Retrieved 2008-04-21.
  23. ^ Taraborelli, Dario. "CSS-driven TeX logos". Archived from the original on 2017-09-01. Retrieved 2008-04-21.
  24. ^ Walden, David (2005-07-15). "Travels in TeX Land: A Macro, Three Software Packages, and the Trouble with TeX". The PracTeX Journal (3). Retrieved 2008-04-21.
  25. ^ "pdfTeX - TeX Users Group". www.tug.org. Retrieved 2019-07-20.
  26. ^ "XeTeX - TeX Users Group". www.tug.org. Retrieved 2019-07-20.
  27. ^ "LuaTeX". Retrieved 2023-07-18.
  28. ^ Website http://hevea.inria.fr/
  29. ^ According to LICENSE file in the source repository.
  30. ^ "CTAN: Package latex2html". ctan.org.
  31. ^ "CTAN: /tex-archive/support/latex2rtf". ctan.org.
  32. ^ "LaTeXML A LaTeX to XML/HTML/MathML Converter". dlmf.nist.gov. Retrieved 2018-08-18.
  33. ^ "Pandoc - About pandoc". pandoc.org.
  34. PMID 25526083
    .
  35. ISBN 978-3-319-08433-6
    .
  36. ^ "KaTeX – The fastest math typesetting library for the web". katex.org.
  37. ^ "The LaTeX project public license". www.latex-project.org. Retrieved 2019-07-20.
  38. ^ Scavo, Tom. "TeX, LaTeX, and AMS-LaTeX". Archived from the original on 3 December 1998. Retrieved 6 September 2018.
  39. ^ Frank Mittelbach, Chris Rowley (January 12, 1999). "The LaTeX3 Project" (PDF). Retrieved 2007-07-30.
  40. ^ Wright, Joseph. "Why is LaTeX3 taking so long to come out?". TeX - LaTeX Stack Exchange.
  41. ^ "LyX: What is LyX?". www.lyx.org. Retrieved 2019-07-20.
  42. ^ "Welcome to GNU TeXmacs (FSF GNU project)". www.texmacs.org.

Further reading
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