On 29-9-2010 1:13, Pierre-François Bonnefoi wrote:

I'use extensively context to write my lecture notes and for all of my printing 

For my students, I've made some lecture presentations in color, and I print them in 
black&white, with four pages on one page for the handout.

I would like to compute a correct Table of contents according to the handout : 
so to divide the current page number by four to get a correct page number for 
the handout.

\def\ChapterPrefix#1{\the\numexpr#1/4 \relax}

That doesn't work, and I've some difficulties to figure how computation is 
performed in e-TeX...

Could you help me to resolve this issue ?


\dorecurse{3}{\chapter{test} \dorecurse{4}{test \page}}


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