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D.6.6.9 ContactMatrix
Procedure from librarycurvepar.lib (see curvepar_lib).
- Usage:
- ContactMatrix(I); I ideal
- Assume:
- i is the defining ideal of a (reducible) plane curve singularity.
- Return:
- intmat N of the contact matrix of the braches of the curve.
LIB "curvepar.lib"; ring r=0,(x,y),ds; ideal i=x14-x4y7-y11; ContactMatrix(i); ==> 0,1,1,1,1, ==> 1,0,1,1,1, ==> 1,1,0,1,1, ==> 1,1,1,0,1, ==> 1,1,1,1,0 |