# ApCoCoA-1:BB.HomNDgens

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Revision as of 20:45, 2 November 2007 by KHiddemann (talk | contribs) (removing Kaspar's command refs in the descriptions since the man pages look strange)

## borderbasis.HomNDgens

Compute gens of vanishing ideal of hom. BB scheme corresp. to lifting of an element of NDneighbors(OO)

### Syntax

$borderbasis.HomNDgens(K:INT,OO:LIST):LIST

### Description

Computes the generators of the vanishing ideal of the homogenous border basis scheme corresponding to the lifting of the K-th element of NDneighbors(OO). The input is an integer K In 1..Len(NDneighbors(OO)) and a list of terms OO (2nd element of type POLY). The output is a list of poly in the ring <formula>BBS=K[c_{ij}]</formula>.