is an amazing clever document preparation system, which is super helpful to format absolut (100%) correctly, very complex mathematical formulas and equations for any professional document and educational books, can now also directly be used in modern CMS/Web-Systems – like WordPress and LaTeX.
Simple examples of formulas written in :
Lorentzfactor (designed with ):
The short description for in English is: http://tug.ctan.org/info/lshort/english/lshort.pdf
The short description for in German is: http://tug.ctan.org/info/lshort/german/l2kurz.pdf
Official – Doc: plus http://www.latex-project.org are helpful places
The German TeX User-Group is: http://www.dante.de
The German Wikipedia for is: https://de.wikipedia.org/wiki/LaTeX