fossilesque@mander.xyzM to Science Memes@mander.xyzEnglish · 8 days agoBaldur's Gaytemander.xyzimagemessage-square70linkfedilinkarrow-up11.04Karrow-down19
arrow-up11.03Karrow-down1imageBaldur's Gaytemander.xyzfossilesque@mander.xyzM to Science Memes@mander.xyzEnglish · 8 days agomessage-square70linkfedilink
minus-squareSemjaza@lemmynsfw.comlinkfedilinkEnglisharrow-up1·7 days agoA 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
minus-squareiAvicenna@lemmy.worldlinkfedilinkEnglisharrow-up3·7 days agoIf 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.
minus-squareSemjaza@lemmynsfw.comlinkfedilinkEnglisharrow-up2·7 days agoOK, 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.
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
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.
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.