%@P:maxima1

.p OUTF=plotb

%@M:
\maxima{} peut tracer des surfaces (via \texttt{gnuplot}).
.m plot3d(x^2-y^2,[x,-2,2],[y,-2,2],[grid,12,12]);
.m plot3d(x^2-y^2,[x,-2,2],[y,-2,2],[grid,12,12],[gnuplot_pm3d,true]);