In a document, is it possible to change the base in which the numeration is written? The default numeration is decimal, but I would like to use an octal or hexadecimal numeration for instance.
Also, when I use a document class 'book' or 'report', how can I set a negative numeration before the main text? What I mean by this is that instead of small latin numeration (i, ii, iii, iv, ...) I would like the pages to decrease with a negative sign in front. Is there a way to do so?