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We needed computer graphics to help us visualize the structure of shapes called twisted scroll rings. When Winfree had previously tried to do it by hand, he'd produced the "embarrassing Escher-like contradiction" shown below.
Ask me anything about the "The Joy of x" -- it's tonight's featured selection for the @MoMath1 book club. Hope you can join us at this online event! Wed, Dec 8 at 6:30 pm ET. Register at https://t.co/LIqpozYxXl