Greg Egan Explains Steffen's Flexible Polyhedron
Steffen's Polyhedron – Greg Egan
Science fiction author Greg Egan presents a geometric curiosity: Steffen's polyhedron, a flexible polyhedron with 14 triangular faces that can change shape without altering any face. Egan details its construction from two congruent pyramids and provides a printable net. He also notes the 2024 discovery of an 8-vertex flexible polyhedron by Gallet et al., breaking the previous 9-vertex minimum.
It’s not hard to see how Steffen’s polyhedron is constructed.
- wwind123
I like the "Dark Integers" series of stories written by Greg Egan. They might even have inspired Liu Cixin to write in Death's End that somewhere deep in the universe, some powerful civilizations would weaponize physics laws, and some other even more powerful civilizations could even weaponize mathematics laws.
- larodi
Note: the same Greg Egan who wrote these https://www.amazon.de/s?k=greg+egan
- dywilby
Egan's dedication to going above and beyond justifying the worlds he creates still astounds me. I hope they make one of his books into a movie (Permutation City is my favorite and would be very topical given today's obsession with AGI).