Leslies theory of thermomechanical coupling

The fact that the properties of the cholesteric liquid crystal are not invariant with respect to reflexion introduces some additional complexity into the equations of the continuum theory. The possibility now exists of 

Resolving fy, and / , into their static and hydrodynamic parts. 

The free energy of elastic deformation per unit volume is given by (3.2.7). 

Martin, Parodi and Pershan and Lubensky developed a general 

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