One of the major features of \PyX{} is to use the \TeX{} typesetting engine to
create text. \PyX{} will start a single \TeX{} or \LaTeX{} instance as soon as
text needs to be typeset. It passes the texts to this instance and directly
reads the typeset information (dvi file) as created by the \TeX{} interpreter.
By this seemless and as far as we know unique integration all the advanced
features of the \TeX{} typesetting system like its high quality paragraph
builder or the highly advanced math mode become available to \PyX{} users.
