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

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(Inserted example, updated "see" section)
(Updated description)
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<command>
 
<command>
 
     <title>BB.LiftND</title>
 
     <title>BB.LiftND</title>
     <short_description>BBS generators from lifting of ND neighbors</short_description>
+
     <short_description>BBS ideal generators from lifting of ND neighbors</short_description>
 
<syntax>
 
<syntax>
 
BB.LiftND(OO:LIST):LIST
 
BB.LiftND(OO:LIST):LIST
 
</syntax>
 
</syntax>
 
     <description>
 
     <description>
Compute the equations defining the border basis scheme and coming from the lifting of next-door neighbors. The input is a list of terms OO (2nd element of type POLY). The output is a list of poly in the ring <formula>BBS=K[c_{ij}]</formula>.
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Computes the generators of the border basis scheme ideal <formula>I(\mathbb{B}_\mathcal{O})</formula> that result from the lifting of next-door neighbors. The input is a list of terms OO (2nd element of type POLY). The output is a list of poly in the ring <formula>BBS=K[c_{ij}]</formula>.
 
<example>
 
<example>
 
Use Q[x,y], DegRevLex;
 
Use Q[x,y], DegRevLex;

Revision as of 20:23, 29 July 2008

BB.LiftND

BBS ideal generators from lifting of ND neighbors

Syntax

BB.LiftND(OO:LIST):LIST

Description

Computes the generators of the border basis scheme ideal <formula>I(\mathbb{B}_\mathcal{O})</formula> that result from the lifting of next-door neighbors. The input is a list of terms OO (2nd element of type POLY). The output is a list of poly in the ring <formula>BBS=K[c_{ij}]</formula>.

Example

Use Q[x,y], DegRevLex;
BB.LiftND([Poly(1), x, y, xy]);

[BBS :: c[1,2]c[2,1] + c[1,4]c[4,1] - c[1,3],
 BBS :: c[2,1]c[2,2] + c[2,4]c[4,1] + c[1,1] - c[2,3],
 BBS :: c[2,1]c[3,2] + c[3,4]c[4,1] - c[3,3],
 BBS :: c[2,1]c[4,2] + c[4,1]c[4,4] + c[3,1] - c[4,3],
 BBS :: c[1,1]c[3,2] + c[1,3]c[4,2] - c[1,4],
 BBS :: c[2,1]c[3,2] + c[2,3]c[4,2] - c[2,4],
 BBS :: c[3,1]c[3,2] + c[3,3]c[4,2] + c[1,2] - c[3,4],
 BBS :: c[3,2]c[4,1] + c[4,2]c[4,3] + c[2,2] - c[4,4]]
-------------------------------


BB.LiftAS

BB.LiftASViaServer

BB.LiftHomAS

BB.LiftNDViaServer

BB.LiftHomND