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The Moving Sofa Problem - Numberphile | Fifth Root Trick - Numberphile - At Up-Tube.com

The Moving Sofa Problem - Numberphile Fifth Root Trick - Numberphile 7 months ago   13:00

Numberphile
Featuring Dan Romik from UC Davis.
More footage from this interview soon on Numberphile2.
Dan's comprehensive page on this topic: http://bit.ly/movingsofa

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Comments 1277 Comments

Yiyosk o
lets makit virtual and trow it some neral networks
Andrew
Movers do this instinctively, standing the sofa up into the z axis reduces the surface area.
Zhuang Zhuang Sun
In early 2153, mathematicians use newly discovered mathematical model and the discovery of the 5th dimension to solve this problem by moving to a house with a straight hallway into the living room and getting a rectangular sofa
Alexander Gravois
This is what these number nerds are doing with research grants? MOTHERJFFHDDGVHGFCRRR3FYI7GBI
SWIFTY_WINS
Solution: An endless beanbag sofa that's flexible like a snake and the exact size of the hallway.
Momsemann
PIVOT
nick mora
I was playing destiny today. A friend said he had to stop playing to help his dad with a sofa.
We made a few jokes about sofas. Then, two hours later, this video shows up. You tube listening in.
Darch
Alright, we have two dimensions down. Let's see a three dimensional ambiturner!
James K.
Solution: Move the sofa and you into the 4th dimension, go around the corner, move backwards in 4d, and you've managed to get a rectangular sofa as long as the hallway around the corner.
chenyitube
Solution: Sectionals
Bjarke Ebert
What is the *longest* sofa (measured as the biggest diameter of it) that can negotiate the turn?
Obviously one that is bent can be longer than if it needed to be a straight line.
My guess is that it's an arc (piece of a circle, with width epsilon)
Get Lifted
“I turned left!”
Mi Drums
I wonder if I get a sofa that shape, how long would it take for someone to understand why is it that weird shape.
lumpiger Affe
It bothered me alot that the 3D-printed sofas were not optimal at all.
vidhill
The semi-circular sofa would pivot in the opposite direction if it was tumbled on its end after the first corner
Sam T
just get a futon...
Javier Da Rosa
The Romik Ambiturner shape can connect two behinds for "numberphilic actions"...
Jack Ellery
Pivot! PIVOT! PIVAAAAAAT!!!
Christiaan Retief
Sofa : Moves

Mathmeticians: Thats a problem
Andrew Merlin
Interesting. Is there a three dimensional version?
Add Reply

Fifth Root Trick - Numberphile The Moving Sofa Problem - Numberphile 7 months ago   06:06

A neat trick to quickly calculate fifth roots.
More links & stuff in full description below ↓↓↓

Featuring Simon Pampena, Australian Numeracy Ambassador.
https://twitter.com/mathemaniac

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