Difference between revisions of "ApCoCoA-1:BB.ASneighbors"
From ApCoCoAWiki
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</syntax> | </syntax> | ||
<description> | <description> | ||
| − | + | This command computes the list of across-the-street neighbors in the border of the order ideal <tt>OO</tt>. The input is a list <tt>OO</tt> of terms that specify an order ideal. The output is a list of quadruples <tt>[i,j,k,l]</tt> such that <tt>x_k * b_i = x_l * b_j</tt>. | |
<itemize> | <itemize> | ||
<item>@param <em>OO</em> A list of terms representing an order ideal.</item> | <item>@param <em>OO</em> A list of terms representing an order ideal.</item> | ||
| − | <item>@return A list of across-the-street neighbors of OO.</item> | + | <item>@return A list of across-the-street neighbors of <tt>OO</tt>.</item> |
</itemize> | </itemize> | ||
<example> | <example> | ||
Revision as of 14:36, 8 July 2009
BB.ASneighbors
Computes a list of across-the-street neighbors.
Syntax
BB.ASneighbors(OO:LIST):LIST
Description
This command 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]] -------------------------------
