# record 1: header: parent, keywords
# record 2: calling parameters
# record 3: submit buttons
# record 4: html form content

:geometrie, tracee, courbe, 2D courbe, courbe 2D, courbe implicite,
tracer courbe implicite, courbe plane, courbe plane implicite, implicite

:picturesize1, 260
picturesize2, 260
operation, tracer la courbe plane implicite,graphing/implot2d
size, 600x480

:, Tracer la courbe implicite

:
 $submit1
 <input name="formula" type="text" size="45" value="x^4 + y^4 + 4xy">
 <br>
 Zone :
 <input size="6" name="xrange1" value="-2"> &le; x &le;
 <input size="6" name="xrange2" value="2">,
 &nbsp;
 <input size="6" name="yrange1" value="-2"> &le; y &le;
 <input size="6" name="yrange2" value="2"> .
