as a function of conformational asymmetry $\varepsilon$.

Recall that for $\varepsilon>1$ the $B$-block is more flexible, while the $A$-block is stiffer and better able to stretch. For the symmetric wedge $(p=2)$ conformational asymmetry reduces the stability of the stiff-minority wedge phase $(\phi<1/2)$ and enhances the stability of the flexible-minority wedge phase ($\phi>1/2$), and shifts all transitions to greater $\phi$. For $p>2.0$ the wedge phases lose stability, as could be guessed from Figure \[fig:wedgeshape\]. For $p<2.0$, for which the wedge is more cylindrical-like ($p=1$ coresponds to cylinders), conformational asymmetry enhances the stiff-minority wedge phase relative to both the lamellar and cylindrical phases, and decreases the stability of the flexible-minority wedge phase. We emphasize that these are not phase diagrams, for a true phase is a mixture of wedges with different shape factors which fill space.

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Conformational Asymmetry
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Experimentally, the G phase has been observed between the lamellar and cylindrical phases in several strongly-segregated copolymer systems, for $\phi$ around 0.3 (and, symmetrically, around 0.7). Some groups have argued for phase stability of bicontinuous phases in terms of bending rigidities,[@ajdarileibler91; @Wang90a]. However, there is fundamentally no bending energy in the problem; descriptions in terms of bending energies only arise 