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D.4.18.7 radical

Procedure from library primdec.lib (see primdec_lib).

Usage:
radical(I[, l]); I ideal, l list (optional)
Optional parameters in list l (can be entered in any order):
0, "fullRad" -> full radical is computed (default)
1, "equiRad" -> equiRadical is computed
"KL" -> Krick/Logar algorithm is used
"SL" -> modifications by Laplagne are used (default)
"facstd" -> uses facstd to first decompose the ideal (default for non homogeneous ideals)
"noFacstd" -> does not use facstd (default for homogeneous ideals)

Return:
ideal, the radical of I (or the equiradical if required in the input parameters)

Note:
A combination of the algorithms of Krick/Logar (with modifications by Laplagne) and Kemper is used. Works also in positive characteristic (Kempers algorithm).

Example:
 


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