Type Command

Type( <Object> )

For conics and quadrics this command returns a number representing the conic/quadric type according to the table below. In this context empty conic (or quadric) is one where all coefficients are defined, but the conic (quadric) contains no points, e.g. x²+y²=-1

Example: Type(x²+y²=1) yields 4 which stands for circle.

Value	Meaning for conic	Meaning for quadric
1	Single point	Single point
2	Intersecting lines
3	Ellipse	Ellipsoid
4	Circle	Sphere
5	Hyperbola	Hyperboloid
6	Empty	Empty
7	Double line	Double plane
8	Parallel lines
9	Parabola	Paraboloid
10	Line	Line
30		Cone
31		Cylinder
33		Plane
34		Parallel planes
35		Intersecting planes
36		Hyperboloid one sheet
37		Hyperboloid two sheets
38		Parabolic cylinder
39		Hyperbolic cylinder
40		Hyperbolic paraboloid