The package uses a text font (usually the document's text font)
for the letters of the Latin alphabet needed when typesetting
mathematics. (Optionally, other characters in the font may also
be used). This facility makes possible (for a document with
simple mathematics) a far wider choice of text font, with
little worry that no specially designed accompanying maths
fonts are available. The package also offers a simple mechanism
for using many different choices of (text hence, now, maths)
font in the same document. Of course, using one font for two
purposes helps produce smaller PDF files.
