FUNCTION: heralg[cartan_matrix] - the Cartan matrix of a quiver algebra
CALLING SEQUENCE:
cartan_matrix(Q)
Q - a quiver given by a quiverdata structur
SYNOPSIS:
EXAMPLES:
>
with(heralg):
>
cartan_matrix( [2,[[1,2,r]]] );
>
Q := [ 3, [[1,2], [2,3,2]]];
>
cartan_matrix(Q);
SEE ALSO: heralg/quiverdata
BACK TO: start page of the crep online manual, heralg