Sorry, you did not get it. If the Cartan matrix C is nxn you get n generators which are nxn matrices.
The i-th matrix is the identity eye(C) modified as follows: you subtract the i-th line of C from the i-th line of
eye(C)
Sorry, you did not get it. If the Cartan matrix C is nxn you get n generators which are nxn matrices.
The i-th matrix is the identity eye(C) modified as follows: you subtract the i-th line of C from the i-th line of
eye(C)