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Showing posts from December, 2016

What polyhedron is this?

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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...

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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

This honeycomb by Roice Nelson lives in a curved 3-dimensional space called hyperbolic space.

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