Difference between revisions of "ApCoCoA-1:BB.ASneighbors"
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KHiddemann (talk | contribs) (fixing keys) |
KHiddemann (talk | contribs) (new alias) |
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<command> | <command> | ||
| − | <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> | ||
| − | + | BB.ASneighbors(OO:LIST):LIST | |
</syntax> | </syntax> | ||
<description> | <description> | ||
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<example> | <example> | ||
Use Q[x,y,z]; | 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]] | [[1, 2, 2, 3], [3, 4, 2, 3], [3, 5, 1, 3], [4, 5, 1, 2]] | ||
------------------------------- | ------------------------------- | ||
</example> | </example> | ||
</description> | </description> | ||
| − | <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]] -------------------------------
