fossilesque@mander.xyzM to Science Memes@mander.xyzEnglish · 3 months agoBaldur's Gayteimagemessage-square70linkfedilinkarrow-up11.05Karrow-down19
arrow-up11.04Karrow-down1imageBaldur's Gaytefossilesque@mander.xyzM to Science Memes@mander.xyzEnglish · 3 months agomessage-square70linkfedilink
minus-squareSemjaza@lemmynsfw.comlinkfedilinkEnglisharrow-up1·3 months 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-squareAvicenna@lemmy.worldlinkfedilinkEnglisharrow-up3·3 months 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-up2·3 months 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.