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Abstract
The Freedericksz transition in the magnetic field with pretilt angle is theoretically investigated. Assuming the amplitude of director distortion ε m is small, three characteristic fields Hci (i = 1,2,3) caused by nontrivial value of the pretilt angle θ0 are given as functions of θ0 and the elastic constants. Drawing of free energy as a function of ε m leads to clear understanding of these characteristic fields and the dynamics of director states. The relaxation laws of ε m , after switching the field are expressed in the concise form.