LyX is a fully featured document processor similar to MS word but freely available under GPL-2(+later) license, it is cross-platform and available for Linux, Windows, Mac, OS/2, and Haiku. It encourages an approach to writing based on the structure of your documents (WYSIWYM) and not simply their appearance (WYSIWYG). It combines the flexibility and power of TeX/LaTeX with easy to use GUI. This results in world-class support for creation of mathematical content (via a fully integrated equation editor) and structured documents like academic articles, theses, and books.

It has mathematical formula editor which is easily best of breed. Fully harnesses the power of LaTeX. Equations can be entered via point-and-click interface or via keyboard with LaTeX commands (optionally via auto-completion). Formulas are immediately visually rendered on screen. Equation arrays, equation numbering, theorems, customizable math macros, matrices, algorithms, and much more. Support of math macros. Basic support for various Computer Algebra Systems (CAS) - Maple, Maxima, Octave, Mathematica .
Advanced features for labels, references, index and bibliography (including advanced BibTeX support). Standard word processor operations, like cut/paste, multiple open documents, undo/redo, spellchecking (uses aspell or hunspell in the background), thesaurus and revision tracking. Support for many graphic formats (including EPS, SVG, XFig, Dia and others). Support for writing documents in many languages of the world.

Import and export to many formats (LaTeX, PDF, Postscript, DVI, ASCII, HTML, OpenDocument, RTF, MS Word, and others). Access to all LaTeX functionality with capability to insert plain LaTeX code anywhere in a document. Send a fax from within LyX. Source code viewer for instant LaTeX and DocBook view. SGML-tools support (DocBook DTDs). Literate programming support (noweb, Sweave). Support for export of PDF bookmarks and header information.
In addition, staples of scientific authoring such as reference list and index creation come standard. But you can also use LyX to create a letter or a novel or a theatre play or film script. A broad array of ready, well-designed document layouts are built in.
For more information checkout wiki of LyX.

LyX is for people who want their writing to look great, right out of the box. No more endless tinkering with formatting details, “finger painting” font attributes or futzing around with page boundaries. You just write. On screen, LyX looks like any word processor; its printed output — or richly cross-referenced PDF, just as readily produced — looks like nothing else.



To install LyX Document Processor in Ubuntu/Linux Mint/other Ubuntu derivatives open Terminal (Press Ctrl+Alt+T) and copy the following commands in the terminal:

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