Semjaza comments on Baldur's Gayte

Baldur's Gayte (mander.xyz)

submitted 1 year ago by fossilesque@mander.xyz to c/science_memes@mander.xyz

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[–] Semjaza@lemmynsfw.com 1 point 1 year ago (2 children)

A CD is clearly homotopic to a torus, though...

And the walls of a straw do have thickness...
A straw goes:

Gas - solid - gas - solid - gas

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[–] iAvicenna@lemmy.world 3 points 1 year ago (1 child)

If solid torus yes, if just the regular torus (surface of the solid torus) no. CD is homotopic to a circle and so is a solid torus.

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[–] Semjaza@lemmynsfw.com 2 points 1 year ago

OK, that's my ignorance. I didn't realise toruses were usually hollow.

Thank you for letting me know, you're right and I've learnt something.

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