Roice's G+ Posts

What polyhedron is this? Hints: * The dihedral angle is 120 degrees. * It's perfectly regular! Surprise, there are more than 5 platonic solids :D Bonus question. What kind of rotation is pictured? Thank you Naomi Weinberger for suggesting this animation, and thank you Sean Walker for sharing information about how you create.

I really enjoyed and highly recommend both of Siobhan's mathematician biographies, so it's cool to see her receive an award! King of Infinite Space: Donald Coxeter, the Man Who Saved Geometry https://www.amazon.com/King-Infinite-Space-Coxeter-Geometry/dp/0802714994 Genius At Play: The Curious Mind of John Horton Conway https://www.amazon.com/Genius-At-Play-Curious-Horton/dp/1620405954 Originally shared by American Mathematical Society Congratulations to Siobhan Roberts, winner of the 2017 JPBM Communications Award for Expository and Popular Books http://bit.ly/2h56duU

Originally shared by American Mathematical Society This honeycomb by Roice Nelson lives in a curved 3-dimensional space called hyperbolic space. John Baez explains, on the Visual Insight Blog at http://bit.ly/2h2ATe5 . http://bit.ly/2h2to71