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`desing/exdshrc`

An auxiliary procedure for `desing/exdsh`, tracing the weak transform of exceptional components from the blowing up centers from which they arise to the charts of the covering of the final blowing up variety.

Input:
 
chi
the ID of the chart to be processed,
ei
the index (in IND) of the defining equation of the exceptional component in question,
ex
the exponent of the exceptional component in question.
Output:
-
The procedure assumes that chartHistory contains the chart tree of a computed seqence of blowing ups and puts the sections of the computed ideal sheaf into the SCS entries of the charts of the covering of the final blowing up variety.
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