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D.4.5.5 radEHV
Procedure from library ehv.lib (see ehv_lib).
- Usage:
- radEHV(I [,Strategy]); ideal I, Strategy list
- Return:
- ideal, the radical of I
- Note:
- uses the algorithm of Eisenbud/Huneke/Vasconcelos
Works only in characteristic 0 or p large.
The (optional) second argument determines the strategy used:
Strategy[1] > strategy for the equidimensional part
= 0 : uses equiMaxEHV
= 1 : uses equidimMax
Strategy[2] > strategy for the radical
= 0 : combination of strategy 1 and 2
= 1 : computation of the radical just with the
help of regular sequences
= 2 : does not try to find a regular sequence
Strategy[3] > strategy for the computation of ideal quotients
= n : uses quot(.,.,n) for the ideal quotient computations
If no second argument is given then Strategy=(0,0,0) is used.
Example:
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