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D.5.6.5 collectDiv
Procedure from library reszeta.lib (see reszeta_lib).
- Usage:
- collectDiv(L);
L = list of rings
- Assume:
- L is output of resolution of singularities
- Compute:
- list representing the identification of the exceptional divisors
in the various charts
- Return:
- list l, where
l[1]: intmat, entry k in position i,j implies BO[4][j] of chart i
is divisor k (if k!=0)
if k==0, no divisor corresponding to i,j
l[2]: list ll, where each entry of ll is a list of intvecs
entry i,j in list ll[k] implies BO[4][j] of chart i
is divisor k
l[3]: list L
Example:
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