[GAP Forum] MatrixOfAction

Jan Draisma Jan.Draisma at unibas.ch
Thu May 13 15:01:27 BST 2004


Dear Gap-Forum,

I'm having the following problem with MatrixOfAction:

g:=SimpleLieAlgebra("A",1,Rationals);;
x:=GeneratorsOfAlgebra(g);;
V:=HighestWeightModule(g,[1]);;
W:=DirectSumOfAlgebraModules(V,V);;
B:=Basis(W);;
MatrixOfAction(B,x[1]);

Error, no method found! ...

Is this use of MatrixOfAction (or in Coefficients, where the problem
seems to be located) unsupported?

Best wishes,

  Jan




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