  We consider a nonnegative potential $W:\mathbb{R}^2\rightarrow\mathbb{R}$
invariant under the action of the rotation group $C_N$ of the regular polygon
with $N$ sides, $N\geq 3$. We assume that $W$ has $N$ nondegenerate zeros and
prove the existence of a $N$-junction solution to the vector Allen-Cahn
equation. The proof is variational and is based on sharp lower and upper bounds
for the energy and on a new pointwise estimate for vector minimizers.
