Numberphile - Rubik's Cubes & Ridiculous Numbers

[CaptainK]

In this video, a math prof explains how to calculate the number of scrambles for big cubes

EDIT: and there's a second video that covers odd-numbered cubes!

 

[acrystal]

In this video, a math prof explains how to calculate the number of scrambles for big cubes

YES I LOVE MATH AND RUBIKS CUBES SO OFC I SAW THIS
Also btw is there an equation for the permutations of a rubiks cube?

 

[qwr]

This guy is a real speedcuber or got his cubes from one. He's got the GAN 2x2 and 3x3s, a qiyi warrior looking 4x4 and a decent modern 6x6.

 

[cuber314159]

This guy is a real speedcuber or got his cubes from one. He's got the GAN 2x2 and 3x3s, a qiyi warrior looking 4x4 and a decent modern 6x6.

I literally got an email from him while I was watching the video, apparently he got most of his cubes from my store!

 

[qwr]

I literally got an email from him while I was watching the video, apparently he got most of his cubes from my store!

That's cool! You should sponsor him to be a cube math ambassador and give some to students or something

 

[qwr]

One of the things that disappoints me about Numberphile, and I understand completely because I know they don't have an hour to go over it, is that they just assert things like 7 of the 2x2 corners determines the last one and you have to take it at face value. You can actually show this pretty easily by coming up with some corner orientation invariants, and this gives a lot more insight into why we know these numbers are right

 

[Renslay]

One of the things that disappoints me about Numberphile, and I understand completely because I know they don't have an hour to go over it, is that they just assert things like 7 of the 2x2 corners determines the last one and you have to take it at face value. You can actually show this pretty easily by coming up with some corner orientation invariants, and this gives a lot more insight into why we know these numbers are right

Although this is true, don't forget that the target audience of that video are not just cubers, and the content can already be overwhelming if you see these things for the first time.
So, maybe an extra on their second channel?
Also, Mathologer has a phenomenal video on permutation parity (with proof), and that alone is already 40 minutes long!

 

[abunickabhi]

I just love the video making aspect of Mathologer. He is quite elaborate yo

 

[That0newe1rdo]

got scared for a minute.

"THERE ARE NO RULES AGAINST THE NUMBERJACKS BATMAN"

(core memory as a british child btw)

nice topic that ive always been interested in, but could never wrap my head around.

 

[acrystal]

got scared for a minute.

"THERE ARE NO RULES AGAINST THE NUMBERJACKS BATMAN"

View attachment 48327

(core memory as a british child btw)

nice topic that ive always been interested in, but could never wrap my head around.

Im not british, but i had nostalgia watching it ofc