SCOTT CAMAZINE / SCIENCE PHOTO LIBRARY SCOTT CAMAZINE / SCIENCE PHOTO LIBRARY
Boy's Surface (Apery). Boy's surface is an immersion of the real projective plane in 3-dimensional space found by Werner Boy in 1901. It has no singularities (i.e., pinch-points), but it does self-intersect. This figure is based on the equations discovered by Apery.
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