ApCoCoA-1:BBSGen.TraceSyzLin

This article is about a function from ApCoCoA-1.

BBSGen.TraceSyzLin

This function computes the K[c]-linear summand of trace polynomials.(see BBSGen.TraceSyzFull)

Syntax

BBSGen.TraceSyzLin(OO,BO,N);
BBSGen.TraceSyzLin(OO:LIST,BO:LIST,N:INTEGER):LIST

Description

• @param The order ideal OO, border BO, the number of Indeterminates of the polynomial ring K[x_1,...,x_N].

• @return List of polynomials from K[t[1..N,1..N,1..Mu,1..Mu]] that is a sub-ring of XX=K[c[1..Mu,1..Nu],t[1..N,1..N,1..Mu,1..Mu]].

  
  

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());
 W:=BBSGen.Wmat(OO,BO,N);

Use XX::=QQ[c[1..Mu,1..Nu],t[1..N,1..N,1..Mu,1..Mu]]; 

BBSGen.TraceSyzLin(OO,BO,N); 

[
  t[1,2,1,3] + t[1,2,2,4],
  2t[1,2,1,2] + 2t[1,2,3,4],
  t[1,2,1,3] + t[1,2,2,4],
  2t[1,2,1,4]]
-------------------------------

BBSGen.Wmat

BBSGen.TraceSyzStep

BBSGen.TraceSyzFull