## QI online calculation server help |

in homogeneous form, with integer coefficients. Example:

Affine form: | x^2-2*y*z-9*y+8 |

Homogeneous form: | x^2-2*x*z-9*y*w+8*w^2 |

These two fields can also be filled automatically (see Auto-fill).

automatically filled with two quadrics whose intersection is of the selected type.

The quadrics can then be modified by applying some random transformation (see Perturbation).