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Figure 5
We visualize the set of coincidence angles in plotting the values of the coincidence angles [0\leq\delta = \alpha/2 = \arctan m\rho/n\leq\theta] as a function of the square length [\sigma = n^{2}+m^{2}\rho^{2}] of the generating coincidence node (n,m). Here, the example of the rectangle system with [\rho = \sqrt{5/3} ] for [0\leq\delta\leq\pi/2]; the other solution [\delta^{\prime} = \delta-\pi/2] is obtained on the same diagram by exploring the x axis from [-\pi/2] to 0. The vertical dashed line corresponds to n = m = 1, i.e. [\delta = \arctan\rho].

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ISSN: 2053-2733
Volume 79| Part 4| July 2023| Pages 301-317
https://doi.org/10.1107/S2053273323003662
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