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When treating Flory model and self-consistent field model, we derived conditions for critical point from

\frac{\partial^2A}{\partial M^2}=0

Why we did not write also the condition

\frac{\partial A}{\partial M} = 0\end{displaymath}

Does it follow from equations for binodal & spinodal in Landau model (11) and (12)

 2dM^2+\alpha(T-T_c)&=0\  6dM^2+\alpha(T-T_c)&=0
 \end{aligned} \end{displaymath}

that spinodal lies inside binodal?

© 1997 Boris Veytsman and Michael Kotelyanskii
Tue Oct 14 22:58:59 EDT 1997