FUNCTION: heralg[perp_cm] - the Cartan matrix of the algebra corresponding to the right perpendicular category of a module
CALLING SEQUENCE:
perp_cm(x, Q)
x - a vector
Q - a quiver given by a quiverdata structure
SYNOPSIS:
EXAMPLES:
>
with(heralg):
>
perp_cm(array([4,5,0]), [3,[[2,1,2],[3,2]]]);
>
Q:= [ 4, [[2,1], [3,1], [3,2], [4,3]]];
>
x := array( [ 9,6,6,2 ] );
>
perp_cm(x,Q);
SEE ALSO: heralg/quiverdata, heralg[perpgen], heralg[perp_quiver]
BACK TO: start page of the crep online manual, heralg