Great! Thanks Travis! I posted your answer on ask.sagemath.org as well.
2013/11/2, Travis Scrimshaw :
> Hey Vincent,
>Well, I can solve the question by using reduced expressions from the
> Coxeter presentation:
>
> sage: S3 = SymmetricGroup(3)
> sage: SGA = GroupAlgebra(S3, QQ)
> sage: MS = Ma
Hey Vincent,
Well, I can solve the question by using reduced expressions from the
Coxeter presentation:
sage: S3 = SymmetricGroup(3)
sage: SGA = GroupAlgebra(S3, QQ)
sage: MS = MatrixSpace(QQ,2)
sage: mtx = [MS([[0,-1],[1,-1]]), MS([[1,-1],[0,-1]])]
sage: phi = SGA.module_morphism(lambda x: MS
