Difference between revisions of "ApCoCoA-1:BB.ASneighbors"
From ApCoCoAWiki
(Types section update.) |
(Example section update.) |
||
| Line 12: | Line 12: | ||
</itemize> | </itemize> | ||
<example> | <example> | ||
| − | Use | + | Use QQ[x,y,z]; |
BB.ASneighbors([1,x]); | BB.ASneighbors([1,x]); | ||
[[1, 2, 2, 3], [3, 4, 2, 3], [3, 5, 1, 3], [4, 5, 1, 2]] | [[1, 2, 2, 3], [3, 4, 2, 3], [3, 5, 1, 3], [4, 5, 1, 2]] | ||
Revision as of 13:07, 23 April 2009
BB.ASneighbors
Compute a list of across-the-street neighbors.
Syntax
BB.ASneighbors(OO:LIST):LIST
Description
Computes the list of across-the-street 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 quadruples [i,j,k,l] such that x_k * b_i = x_l * b_j.
@param OO A list of terms representing an order ideal.
@return A list of across-the-street neighbors of OO.
Example
Use QQ[x,y,z]; BB.ASneighbors([1,x]); [[1, 2, 2, 3], [3, 4, 2, 3], [3, 5, 1, 3], [4, 5, 1, 2]] -------------------------------
