Or
Enter your email address and we'll send you a link to reset your password.
This is a modal window.
Beginning of dialog window. Escape will cancel and close the window.
End of dialog window.
Mathematician Ludwig Schläfli talks to us about objects in the fourth dimension and shows us a procession of regular polyhedra in dimension 4, strange objects with 24, 120 and even 600 faces!
You must create an account to continue watching