ApCoCoA-1:BB.NDneighbors: Difference between revisions
From ApCoCoAWiki
m Corrected description |
m Corrected description |
||
| Line 1: | Line 1: | ||
<command> | <command> | ||
<title>borderbasis.NDneighbors</title> | <title>borderbasis.NDneighbors</title> | ||
<short_description> | <short_description>list of next-door neighbors</short_description> | ||
<syntax> | <syntax> | ||
$borderbasis.NDneighbors(OO:LIST):LIST | $borderbasis.NDneighbors(OO:LIST):LIST | ||
| Line 8: | Line 8: | ||
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 <formula>[i,j,k]</formula> such that <formula>b_i = x_k * b_j</formula>. | 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 <formula>[i,j,k]</formula> such that <formula>b_i = x_k * b_j</formula>. | ||
<example> | <example> | ||
NDneighbors([1,x]); | $borderbasis.NDneighbors([1,x]); | ||
[[3, 1, 1], [4, 2, 1]] | [[3, 1, 1], [4, 2, 1]] | ||
------------------------------- | ------------------------------- | ||
Revision as of 20:42, 7 November 2007
borderbasis.NDneighbors
list of next-door neighbors
Syntax
$borderbasis.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 <formula>[i,j,k]</formula> such that <formula>b_i = x_k * b_j</formula>.
Example
$borderbasis.NDneighbors([1,x]); [[3, 1, 1], [4, 2, 1]] -------------------------------
