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D.5.2.22 constructblwup

Procedure from library resbinomial.lib (see resbinomial_lib).

Usage:
constructblwup(blwhist,n,chy,flag);
blwhist, flag lists, n integer, chy ideal

Return:
the ideal defining the map K[W] --> K[Wi],
which gives the composition map of all the blowing up leading to this chart

Note:
NECESSARY START WITH COLUMNS

Example:
 


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