#!/bin/bash

ps2pdf level_set_cours_preambule_4pages.ps level_set_cours_preambule_4pages.pdf
ps2pdf level_set_cours_4pages.ps level_set_cours_4pages.pdf

pdftk level_set_cours_preambule_4pages.pdf level_set_cours_4pages.pdf cat output level_set_cours_4_pages.pdf