1world: 2 pdflatex presentation.tex 3 pdflatex presentation.tex 4 pdflatex ds.tex 5 bibtex ds 6 pdflatex ds.tex 7 pdflatex ds.tex 8 9clean: 10 rm -f *.ps *~ *.dvi *.aux *.log *.idx *.toc *.nav *.out *.snm *.flc *.vrb 11