Exploring the Projective Plane via Variations on the Faceted Octahedron
Frank Gould and S. Louise Gould Proceedings of Bridges 2012: Mathematics, Music, Art, Architecture, Culture (2012) Pages 507–508
We explore the topology of the projective plane and of its immersions
in 3-space via two models based on the faceted octahedron. This is
a symmetrical immersion closely connected to a smooth immersion
discovered by Werner Boy.