ApCoCoA-1:BBSGen.Wmat

BBSGen.Wmat

This function computes the Weight Matrix with respect to the arrow grading.

Syntax

WMat(OO,BO,N):
WMat(OO:LIST,BO:LIST,N:INTEGER):MATRIX

Description

• @param The order ideal OO, the border BO and the number of Indeterminates of the Polynomial Ring.

• @return Weight Matrix.

Example

Use R::=QQ[x[1..2]];
OO:=BB.Box([1,1]); 
BO:=BB.Border(OO);
N:=Len(Indets());
----------------------
W:=Wmat(OO,BO,N); 
W;

Mat([
  [0, 2, 1, 2, 0, 2, 1, 2, -1, 1, 0, 1, -1, 1, 0, 1],
  [2, 0, 2, 1, 1, -1, 1, 0, 2, 0, 2, 1, 1, -1, 1, 0]
])

BB.Border

BB.Box