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xkcd #3115: Unsolved Physics Problems (imgs.xkcd.com)

submitted 2 days ago by xkcdbot@lemmy.world to c/xkcd@lemmy.world

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xkcd #3115: Unsolved Physics Problems

Title text:

'Tin pest' makes more sense to me. Tin just doesn't want to be locked down in a shape like that. I get it. But why would any metal want to grow hair??

Transcript:

Transcript will show once it’s been added to explainxkcd.com

Source: https://xkcd.com/3115/

explainxkcd for #3115

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[–] whotookkarl@lemmy.dbzer0.com 6 points 1 day ago* (last edited 1 day ago) (1 children)

Cursed unsolved math problems sounding like the beginning of a horror story:

You're lost in a forest without a map and compass...

Does generalized moonshine exist?

What's the longest snake you can jam into an n-dimensional hypercube?

[–] obstbert@feddit.org 2 points 1 day ago (1 children)

I'm interested. Please elaborate!

[–] whotookkarl@lemmy.dbzer0.com 2 points 1 day ago

Bellman's lost in a forest problem: https://en.wikipedia.org/wiki/Bellman%27s_lost-in-a-forest_problem

Generalized moonshine: https://en.wikipedia.org/wiki/Monstrous_moonshine#Generalized_moonshine if the moonshine phenomena also exists outside the monster group

Snake in a box problem: https://en.wikipedia.org/wiki/Snake-in-the-box