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D.5.1.11 testPointConic
Procedure from library paraplanecurves.lib (see paraplanecurves_lib).
- Usage:
- testPointConic(p, r); p poly, r ring
- Assume:
- assumes that p is a homogeneous quadratic polynomial in the
first three ring variables of the current basering;
Assumes that there is a (1x3) matrix named 'point' in r with
entries from the ground field of r.
- Return:
- returns 1 iff the point named 'point', residing in r, lies on
the conic given by p; 0 otherwise
- Note:
- This method temporarily changes the basering to r. Afterwards,
the basering will be the same as before.
Example:
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