Difference between revisions of "ApCoCoA-1:BBSGen.TraceSyzStep"

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{{Version|1}}
 
<command>
 
<command>
 
   <title>BBSGen.TraceSyzStep</title>
 
   <title>BBSGen.TraceSyzStep</title>
   <short_description>: This function  computes the  trace polynomial T_{Pi,X}  with respect to a  given term Pi and a variable from ring K[x_1,...,x_N].(see <ref>BBSGen.TraceSyzFull</ref>)
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   <short_description>This function  computes the  trace polynomial T_{Pi,X}  with respect to a  given term Pi and a variable from ring K[x_1,...,x_N].(see <ref>ApCoCoA-1:BBSGen.TraceSyzFull|BBSGen.TraceSyzFull</ref>)
 
</short_description>
 
</short_description>
 
    
 
    
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   <description>
 
   <description>
 
   Note the following:
 
   Note the following:
   The chosen variable must be a divisor of the term Pi other wise the result is 0.
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   The chosen variable must be a divisor of the term Pi.
   Pi must be a product of at least two different indeterminates.  
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   Pi must be a product of at least two different indeterminates otherwise the result is 0.  
 
    
 
    
  
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   </description>
 
   </description>
 
   <types>
 
   <types>
     <type>borderbasis</type>
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     <type>bbsmingensys</type>
     <type>ideal</type>
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     <type>poly</type>
 
     <type>apcocoaserver</type>
 
     <type>apcocoaserver</type>
 
   </types>
 
   </types>
  
  <see>BBSGen.Wmat</see>
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  <see>ApCoCoA-1:BBSGen.Wmat|BBSGen.Wmat</see>
<see>BBSGen.TraceSyzLin</see>
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<see>ApCoCoA-1:BBSGen.TraceSyzLin|BBSGen.TraceSyzLin</see>
<see>BBSGen.TraceSyzLinStep</see>
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<see>ApCoCoA-1:BBSGen.TraceSyzLinStep|BBSGen.TraceSyzLinStep</see>
<see>BBSGen.TraceSyzFull</see>
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<see>ApCoCoA-1:BBSGen.TraceSyzFull|BBSGen.TraceSyzFull</see>
  
   <key>Wmat</key>
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   <key>TraceSyzStep</key>
   <key>BBSGen.Wmat</key>
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   <key>BBSGen.TraceSyzStep</key>
   <key>bbsmingensys.Wmat</key>
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   <key>bbsmingensys.TraceSyzStep</key>
   <wiki-category>Package_bbsmingensys</wiki-category>
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   <wiki-category>ApCoCoA-1:Package_bbsmingensys</wiki-category>
 
</command>
 
</command>

Latest revision as of 09:52, 7 October 2020

This article is about a function from ApCoCoA-1.

BBSGen.TraceSyzStep

This function computes the trace polynomial T_{Pi,X} with respect to a given term Pi and a variable from ring K[x_1,...,x_N].(see BBSGen.TraceSyzFull)

Syntax

BBSGen.TraceSyzStep(Pi,X,OO,BO,N);
BBSGen.TraceSyzStep(Pi:POLY,X:POLY,OO:LIST,BO:LIST,N:INTEGER):LIST

Description

 Note the following:
 The chosen variable must be a divisor of the term Pi.
 Pi must be a product of at least two different indeterminates otherwise the result is 0. 
 
  • @param The term Pi from K[x_1,...,x_N], the distinguished variable of choice from {x_1,...,x_N}, order ideal OO, border BO, the number of indeterminates of the polynomial ring K[x_1,...,x_N].

  • @return Trace polynomial T_{Pi,X} with respect to a term Pi and a variable X.


Example

Use R::=QQ[x[1..2]];

OO:=$apcocoa/borderbasis.Box([1,1]);
BO:=$apcocoa/borderbasis.Border(OO);
Mu:=Len(OO);
Nu:=Len(BO);
N:=Len(Indets());
Pi:=x[1]^2x[2];

X:=x[1];   ------------Choice of the Indeterminate

Use XX::=QQ[c[1..Mu,1..Nu],t[1..N,1..N,1..Mu,1..Mu]]; 
 
 BBSGen.TraceSyzStep(Pi,X,OO,BO,N);
  
c[1,2]t[1,2,3,1] + c[2,2]t[1,2,3,2] + 
c[3,2]t[1,2,3,3] + c[4,2]t[1,2,3,4] + 
c[1,4]t[1,2,4,1] + c[2,4]t[1,2,4,2] +
 c[3,4]t[1,2,4,3] + c[4,4]t[1,2,4,4] +
 t[1,2,1,3] + t[1,2,2,4]

-------------------------------


BBSGen.Wmat

BBSGen.TraceSyzLin

BBSGen.TraceSyzLinStep

BBSGen.TraceSyzFull