Difference between revisions of "ApCoCoA-1:BB.NDneighbors"
From ApCoCoAWiki
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<see>BB.ASneighbors</see> | <see>BB.ASneighbors</see> | ||
Revision as of 12:04, 24 April 2009
BB.NDneighbors
Compute a list of next-door neighbors.
Syntax
BB.NDneighbors(OO:LIST):LIST
Description
Computes the list of next-door neighbors in the border of the order ideal OO. The input is a list OO of terms that specify an order ideal. The output is a list of triples [i,j,k] such that b_i = x_k * b_j.
@param OO A list of terms representing an order ideal.
@return A list of next-door neighbors of OO.
Example
Use QQ[x,y,z]; BB.NDneighbors([1,x]); [[3, 1, 1], [4, 2, 1]] -------------------------------
