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D.5.5.2 blowUp2

Procedure from library resolve.lib (see resolve_lib).

Usage:
blowUp2(J,C);
J,C = ideals,

Assume:
C = ideal containing J

Note:
C the ideal of the center of the blowup and J the ideal of the variety
Important differences to blowUp:
- V(J) itself is blown up, not the ambient space
- C is not assumed to be non-singular

Compute:
the blowing up of J in C, the exceptional locus and the blow-up map

Return:
list, say l, of size at most size(C),

l[i] is the affine ring corresponding to the i-th chart each l[i] contains the ideals
- Jnew, ideal of the blownup J
- eD, ideal of the new exceptional divisor
- bM, ideal corresponding to the blowup map

Example:
 


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            User manual for Singular version 3-1-6, Dec 2012, generated by texi2html.