Sub Articulo 26.1
Here is a posible solution. The numbers which are written by tex are
the values of \verb|\count0| TeX prints the values of \verb|\count0| to \verb|\count9|
on the output when it produces a page. I make \verb|\count1| contain the
`true'page number, using the everyshi package to increment this.
\begin{verbatim}
\documentclass{article}
\usepackage{everyshi}
\makeatletter
\countdef\c@truepage=1 \c@truepage=0
\makeatother
\EveryShipout{\stepcounter{truepage}}
\begin{document}
\begin{titlepage} Hello \end{titlepage}
a\newpage b
\end{document}
\end{verbatim}
The result is
[1.1] [1.2] [2.3]
Actual pagenumbering is unchanged