= Two-index antisymmetric representation
{title2=$\Lambda^2V$}
The two-index antisymmetric representation of $SU(N)$ is the <exterior square> of its fundamental representation. For $N\ge3$, it has dimension $N(N-1)/2$, Dynkin index $N-2$, and cubic anomaly coefficient $N-4$ in the same normalization. For $N=2$, the <Dynkin index> formula still applies in the stated normalization, but every symmetric cubic <trace> vanishes, so the stated fundamental-normalized <cubic anomaly coefficient> is not defined.
Back to article page
