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D.5.5.9 createBO
Procedure from library resolve.lib (see resolve_lib).
- Usage:
- createBO(J[,W][,E]);
J,W = ideals
E = list
- Assume:
- J = ideal containing W ( W = 0 if not specified)
E = list of smooth hypersurfaces (e.g. exceptional divisors)
- Return:
- list BO representing a basic object :
BO[1] ideal W, if W has been specified; ideal(0) otherwise
BO[2] ideal J
BO[3] intvec
BO[4] the list E of exceptional divisors if specified;
empty list otherwise
BO[5] an ideal defining the identity map
BO[6] an intvec
BO[7] intvec
BO[8] a matrix
entries 3,5,6,7,8 are initialized appropriately for use of CenterBO
and blowUpBO
Example:
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