Portal:Mathematics/Featured picture/2009 05

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Picture of the month

Credit: Inductiveload

A Penrose tiling is a nonperiodic tiling generated by an aperiodic set of prototiles named after Roger Penrose, who investigated these sets in the 1970s. Among the infinitely many possible tilings there are two that possess both reflection symmetry and fivefold rotational symmetry, as in the diagram, and the term Penrose tiling usually refers to both.

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