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Figure 5

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(a) GML4 surface. (b) Torus with a Gielis curve with m = 1/2 as path. (c) A torus with path m = 1, giving rise to a Klein bottle.
(a) GML4 surface. (b) Torus with a Gielis curve with m = 1/2 as path. (c) A torus with path m = 1, giving rise to a Klein bottle.