sentences:  In 6 dimensions and above, there are an infinite amount of non-Wythoffian convex uniform polytopes as the Cartesian product of the Grand antiprism in 4 dimensions and a regular polygon in 2 dimensions.It is not yet proven whether or not there are more.There are four fundamental affine Coxeter groups and 27 prismatic groups that generate regular and uniform tessellations in 5-space