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

From ApCoCoAWiki
(Example section update.)
(Description update.)
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<command>
 
<command>
    <title>BB.LiftHomND</title>
+
  <title>BB.LiftHomND</title>
    <short_description>Compute the homogeneous border basis scheme ideal generators obtained from lifting of ND neighbors.</short_description>
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  <short_description>Compute the homogeneous border basis scheme ideal generators obtained from lifting of ND neighbors.</short_description>
<syntax>
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  <syntax>BB.LiftHomND(OO:LIST):LIST</syntax>
BB.LiftHomND(OO:LIST):LIST
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  <description>
</syntax>
+
Computes the generators of the border basis scheme ideal I(B^hom_O) 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 BBS=K[c_{ij}].
    <description>
 
Computes the generators of the border basis scheme ideal <formula>I(\mathbb{B}^{\textrm{hom}}_\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>.
 
 
<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>
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-------------------------------
 
-------------------------------
 
</example>
 
</example>
    </description>
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  </description>
<types>
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  <types>
<type>list</type>
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    <type>list</type>
</types>
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  </types>
    <see>BB.LiftAS</see>
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  <see>BB.LiftAS</see>
    <see>BB.LiftASViaServer</see>
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  <see>BB.LiftASViaServer</see>
    <see>BB.LiftHomAS</see>
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  <see>BB.LiftHomAS</see>
    <see>BB.LiftND</see>
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  <see>BB.LiftND</see>
    <see>BB.LiftNDViaServer</see>
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  <see>BB.LiftNDViaServer</see>
    <key>LiftHomND</key>
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  <key>LiftHomND</key>
    <key>BB.LiftHomND</key>
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  <key>BB.LiftHomND</key>
    <key>borderbasis.LiftHomND</key>
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  <key>borderbasis.LiftHomND</key>
    <wiki-category>Package_borderbasis</wiki-category>
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  <wiki-category>Package_borderbasis</wiki-category>
 
</command>
 
</command>

Revision as of 11:39, 24 April 2009

BB.LiftHomND

Compute the homogeneous border basis scheme ideal generators obtained from lifting of ND neighbors.

Syntax

BB.LiftHomND(OO:LIST):LIST

Description

Computes the generators of the border basis scheme ideal I(B^hom_O) 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 BBS=K[c_{ij}].

  • @param OO A list of terms representing an order ideal.

  • @return A list of generators of the homogeneous border basis scheme ideal I(B_O) that results from the lifting of next-door neighbors in the border of OO. The polynomials will belong to the ring BBS=K[c_{ij}].

Example

Use QQ[x,y,z], DegRevLex;
BB.LiftHomND([Poly(1), x, y, xy]);

[BBS :: c[3,1]c[4,4] + c[2,1] - c[4,2],
 BBS :: c[2,1]c[4,5] + c[3,1] - c[4,3]]
-------------------------------

BB.LiftAS

BB.LiftASViaServer

BB.LiftHomAS

BB.LiftND

BB.LiftNDViaServer