Difference between revisions of "ApCoCoA-1:BB.ASneighbors"

From ApCoCoAWiki
(fixing keys)
(new alias)
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<command>
 
<command>
     <title>borderbasis.ASneighbors</title>
+
     <title>BB.ASneighbors</title>
 
     <short_description>list of across-the-street neighbors</short_description>
 
     <short_description>list of across-the-street neighbors</short_description>
 
<syntax>
 
<syntax>
$borderbasis.ASneighbors(OO:LIST):LIST
+
BB.ASneighbors(OO:LIST):LIST
 
</syntax>
 
</syntax>
 
     <description>
 
     <description>
Line 9: Line 9:
 
<example>
 
<example>
 
Use Q[x,y,z];
 
Use Q[x,y,z];
$borderbasis.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]]
 
-------------------------------
 
-------------------------------
 
</example>
 
</example>
 
     </description>
 
     </description>
     <see>borderbasis.NDneighbors</see>
+
     <see>BB.NDneighbors</see>
 
     <key>kreuzer</key>
 
     <key>kreuzer</key>
 +
    <key>bb.asneighbors</key>
 
     <key>borderbasis.asneighbors</key>
 
     <key>borderbasis.asneighbors</key>
 
     <wiki-category>Package_borderbasis</wiki-category>
 
     <wiki-category>Package_borderbasis</wiki-category>
 
</command>
 
</command>

Revision as of 19:42, 8 November 2007

BB.ASneighbors

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 <formula>[i,j,k,l]</formula> such that <formula>x_k * b_i = x_l * b_j</formula>.

Example

Use Q[x,y,z];
BB.ASneighbors([1,x]);
[[1, 2, 2, 3], [3, 4, 2, 3], [3, 5, 1, 3], [4, 5, 1, 2]]
-------------------------------

BB.NDneighbors