Fig. 2
Frequency as a function of twist (α). For this particular example, ρi/ρe = 3, p = 1/2, q = 3/2 represented with thick lines while the case p = 0, q = 2 is plotted with thin lines. The dotted line represents the solution for the untwisted case. The horizontal continuous line is obtained by numerically solving the eigenvalue problem in 2D. The same notation as in Fig. 1 is used.
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