incremental, vertex-degenerate, facet-degenerate, triangulation, faces>>size
3, 12, 13
cyclic
<p> a=ceil(sqrt(d)) b=floor(d/a) c=d mod a
2d
nb+sign(c)
gamma(n,2a)*b+sign(c)*(gamma(n,2c))
c ? (V(cyclic(n,2a))b x V(cyclic(n,2c))) : V(cyclic(n,2a))b