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D.5.6.1 intersectionDiv

Procedure from library reszeta.lib (see reszeta_lib).

Usage:
intersectionDiv(L);
L = list of rings

Assume:
L is output of resolution of singularities
(only case of isolated surface singularities)

Compute:
intersection matrix and genera of the exceptional divisors (considered as curves on the strict transform)

Return:
list l, where
l[1]: intersection matrix of exceptional divisors
l[2]: intvec, genera of exceptional divisors
l[3]: divisorList, encoding the identification of the divisors

Example:
 


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