It has polar equation::formula_1with corresponding algebraic equation:formula_2Rotated by 45°, this becomes:formula_3with corresponding algebraic equation:formula_4In either form, it is a plane algebraic curve of genus zero.
Кривая имеет полярное уравнение:: formula_1: formula_2После поворота системы координат на 45°, уравнение кривой принимает вид:: formula_3: formula_4: formula_5* Interactive example with JSXGraph