Figure 4 . A convenient representation of S 5 edge represents a three-sphere invariant point-wise under one of the U(1) isometries, and each vertex represents an S 1 , where two S 3 ’s intersect, invariant point-wise under two U(1) isometries. Each S 1 has two tubular neighborhoods of the form S 1 omega-deformation parameters given in terms of b (cid:6) 1