On the growth rates of cofinite 3-dimensional Coxeter groups some of whose dihedral angles are $\frac{\pi}{m}$ for $m\geq{7}$

We studied the growth rates of cofinite 3-dimensional hyperbolic Coxeter groups whose dihedral angles are of the form $\frac{\pi}{m}$ for $m=2,3,4,5,6$ and showed the growth rates are always Perron numbers in the paper [20]. In this paper, we consider the growth rates of cofinite 3-dimensional hyperbolic Coxeter groups some of whose dihedral angles are $\frac{\pi}{m}$ for $m\geq{7}$ and prove that their growth rates are always Perron numbers. Moreover, by combining with the result in [20], we conclude that the growth rates of cofinite 3-dimensional hyperbolic Coxeter groups are always Perron numbers in general.