$p<1$ to positive Gaussian curvature, and $p>1$ to negative Gaussian curvature. \[The Gaussian curvature is the product of the two radii of curvature of a surface\]. The distribution of wedges must be chosen to pack the desired structure. While the symmetric wedge has $p=2$, this is not an optimum shape. In fact, the optimum wedge shape depends on composition, as can be seen in Figure \[fig:PNwedges\]. It is evident that there are shape factors $p$ which have lower free energy than the straight- and kinked-path hexagonal upper bounds (Figure \[fig:wedgeshape\]), so it is not unreasonable to hope that a judicious packing configuration can be a stable thermodynamic phase.

The effect of the shape factor $p$ on the topology of the phase diagram emerges upon examining conformationally asymmetric ($\varepsilon\neq 1$) copolymers. Following Ref. [@Miln94b], we explore the effect of conformational asymmetry on the stability of bicontinuous phases by multiplying the wedge free energy by an additional arbitrary small prefactor $(0.99)$ which enhances stability. \[We will see below that for $\varepsilon=1$ the bicontinuous phases that we can calculate (G, D, P) are of order $0.3-2.2\%$ higher than the cylinder-lamellar crossing, depending on which upper bound one compares.\] Figure \[fig:asymwedge\] shows ‘phase diagrams’ 