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

From ApCoCoAWiki
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<command>
 
<command>
 
   <title>BBSGen.TraceSyzLinStep</title>
 
   <title>BBSGen.TraceSyzLinStep</title>
   <short_description>This function  computes the  K[c]-linear summand of 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  K[c]-linear summand of 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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   </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.TraceSyzStep</see>
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<see>ApCoCoA-1:BBSGen.TraceSyzStep|BBSGen.TraceSyzStep</see>
<see>BBSGen.TraceSyzFull</see>
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<see>ApCoCoA-1:BBSGen.TraceSyzFull|BBSGen.TraceSyzFull</see>
  
 
   <key>TraceSyzLinStep</key>
 
   <key>TraceSyzLinStep</key>

Revision as of 08:04, 7 October 2020

BBSGen.TraceSyzLinStep

This function computes the K[c]-linear summand of 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.TraceSyzLinStep(Pi,X,OO,BO,N);
BBSGen.TraceSyzLinStep(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, the distinguished variable of choice that divides Pi, order ideal OO, border BO, the number of Indeterminates of the polynomial ring K[x_1,...,x_N].

  • @return K[c]-linear summand of the trace polynomial with respect to Pi and the 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];----Term

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

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

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


BBSGen.Wmat

BBSGen.TraceSyzLin

BBSGen.TraceSyzStep

BBSGen.TraceSyzFull