Message #3203

From: phamthihoa4444@gmail.com
Subject: Re: Question about physical cube
Date: Sun, 01 Nov 2015 22:41:43 -0800

Have you see the video yet? You are only right if someone prove it.
What is wrong with 2^3 in 2D?

• telescopic rod: It exists in nD for all n>=2. In n=2 it just has to be very hard. (attaching picture. I think you can make one too, but I do it for sure)
  
• connector: It exists in 3D, but not 2D. However in 2D you can use soft material to make connector.
  
• magnet.
  
• self-intersection: I can’t find any self-intersection in the video. But in 3D it may exist. In that case you use 3 instead of 6 rods per vertex, at the cost of losing 4D symmetry.
  I will make a better video if you need one. The self-intersection property would be clear.