4 ms·

Wait, am I crazy or is that metal strip actually not a Mobius?

by jeppz 8y ago

jacobush 8y ago
It looks kind of swirly and hidden but it must be... but I couldn't trace it in my mind for some reason!
orian 8y ago
It's not xD
trampi 8y ago
as far as I can tell: no, it does not seem to be a Mobius. Edit: They did change the image. In the last image, they showed a metal surface which wrapped two times and had not the properties of a mobius strip. Edit 2: found it, the old image was this stock image: https://www.istockphoto.com/de/foto/moebius-streifen-in-metallic-optik-gm501799768-81548797 https://www.istockphoto.com/de/foto/moebius-streifen-in-meta...
- coldtea 8y ago
  >Edit: They did change the image. In the last image, they showed a metal surface which wrapped two times and had not the properties of a mobius strip. This is still a single-sided surface though (with the 2 twists). Wikipedia: "the Möbius strip can also be formed by twisting the strip an odd number of times greater than one" Not sure about needing to be "odd", I think 2 qualifies as well, so perhaps odd or even AND prime does it...
  - jackcarter 8y ago
    No, it has two sides. Pick a side and trace it with your finger - you'll never get to the other side. (I'm talking about this image, from the second edit: https://www.istockphoto.com/de/foto/moebius-streifen-in-metallic-optik-gm501799768-81548797 https://www.istockphoto.com/de/foto/moebius-streifen-in-meta... )
ocfnash 8y ago
It is a Mobius strip. To convince yourself it might be useful to imagine a point on the surface and imagine tracing it along the strip (avoiding the edges) and seeing if you get back to where your started.
- ioulian 8y ago
  They've changed the image, quickly, but this was the previous image, which is not a Möbius strip: https://www.alamy.com/stock-photo-metallic-moebius-strip-isolated-on-white-background-91752044.html?pv=1&stamp=2&imageid=67A6EDEE-E77F-4688-A6BB-20AC89B3FF86&p=247829&n=0&orientation=0&pn=1&searchtype=0&IsFromSearch=1&srch=foo%3dbar%26st%3d0%26pn%3d1%26ps%3d100%26sortby%3d2%26resultview%3dsortbyPopular%26npgs%3d0%26qt%3dmoebius%2520strip%26qt_raw%3dmoebius%2520strip%26lic%3d3%26mr%3d0%26pr%3d0%26ot%3d0%26creative%3d%26ag%3d0%26hc%3d0%26pc%3d%26blackwhite%3d%26cutout%3d%26tbar%3d1%26et%3d0x000000000000000000000%26vp%3d0%26loc%3d0%26imgt%3d0%26dtfr%3d%26dtto%3d%26size%3d0xFF%26archive%3d1%26groupid%3d%26pseudoid%3d%26a%3d%26cdid%3d%26cdsrt%3d%26name%3d%26qn%3d%26apalib%3d%26apalic%3d%26lightbox%3d%26gname%3d%26gtype%3d%26xstx%3d0%26simid%3d%26saveQry%3d%26editorial%3d1%26nu%3d%26t%3d%26edoptin%3d%26customgeoip%3d%26cap%3d1%26cbstore%3d1%26vd%3d0%26lb%3d%26fi%3d2%26edrf%3d%26ispremium%3d1%26flip%3d0 https://www.alamy.com/stock-photo-metallic-moebius-strip-iso...
  - avip 8y ago
    Fantastic! They even coloured the faces to emphasize the fact it is NOT, in fact, a Mobius strip.
coldtea 8y ago
If you mean this picture they have in the article: http://ichef.bbci.co.uk/wwfeatures/wm/live/624_351/images/live/p0/6q/57/p06q57kj.jpg http://ichef.bbci.co.uk/wwfeatures/wm/live/624_351/images/li... it is. Why wouldn't it be? The single "twist" in the lower right part is the distinctive sign of one.

Wait, am I crazy or is that metal strip actually not a Mobius?

by jeppz 8y ago

Wait, am I crazy or is that metal strip actually not a Mobius?

jacobush 8y ago

It looks kind of swirly and hidden but it must be... but I couldn't trace it in my mind for some reason!

orian 8y ago

It's not xD

trampi 8y ago

as far as I can tell: no, it does not seem to be a Mobius. Edit: They did change the image. In the last image, they showed a metal surface which wrapped two times and had not the properties of a mobius strip. Edit 2: found it, the old image was this stock image: https://www.istockphoto.com/de/foto/moebius-streifen-in-metallic-optik-gm501799768-81548797 https://www.istockphoto.com/de/foto/moebius-streifen-in-meta...

coldtea 8y ago
>Edit: They did change the image. In the last image, they showed a metal surface which wrapped two times and had not the properties of a mobius strip. This is still a single-sided surface though (with the 2 twists). Wikipedia: "the Möbius strip can also be formed by twisting the strip an odd number of times greater than one" Not sure about needing to be "odd", I think 2 qualifies as well, so perhaps odd or even AND prime does it...
- jackcarter 8y ago
  No, it has two sides. Pick a side and trace it with your finger - you'll never get to the other side. (I'm talking about this image, from the second edit: https://www.istockphoto.com/de/foto/moebius-streifen-in-metallic-optik-gm501799768-81548797 https://www.istockphoto.com/de/foto/moebius-streifen-in-meta... )

ocfnash 8y ago

It is a Mobius strip. To convince yourself it might be useful to imagine a point on the surface and imagine tracing it along the strip (avoiding the edges) and seeing if you get back to where your started.

ioulian 8y ago
They've changed the image, quickly, but this was the previous image, which is not a Möbius strip: https://www.alamy.com/stock-photo-metallic-moebius-strip-isolated-on-white-background-91752044.html?pv=1&stamp=2&imageid=67A6EDEE-E77F-4688-A6BB-20AC89B3FF86&p=247829&n=0&orientation=0&pn=1&searchtype=0&IsFromSearch=1&srch=foo%3dbar%26st%3d0%26pn%3d1%26ps%3d100%26sortby%3d2%26resultview%3dsortbyPopular%26npgs%3d0%26qt%3dmoebius%2520strip%26qt_raw%3dmoebius%2520strip%26lic%3d3%26mr%3d0%26pr%3d0%26ot%3d0%26creative%3d%26ag%3d0%26hc%3d0%26pc%3d%26blackwhite%3d%26cutout%3d%26tbar%3d1%26et%3d0x000000000000000000000%26vp%3d0%26loc%3d0%26imgt%3d0%26dtfr%3d%26dtto%3d%26size%3d0xFF%26archive%3d1%26groupid%3d%26pseudoid%3d%26a%3d%26cdid%3d%26cdsrt%3d%26name%3d%26qn%3d%26apalib%3d%26apalic%3d%26lightbox%3d%26gname%3d%26gtype%3d%26xstx%3d0%26simid%3d%26saveQry%3d%26editorial%3d1%26nu%3d%26t%3d%26edoptin%3d%26customgeoip%3d%26cap%3d1%26cbstore%3d1%26vd%3d0%26lb%3d%26fi%3d2%26edrf%3d%26ispremium%3d1%26flip%3d0 https://www.alamy.com/stock-photo-metallic-moebius-strip-iso...
- avip 8y ago
  Fantastic! They even coloured the faces to emphasize the fact it is NOT, in fact, a Mobius strip.

coldtea 8y ago

If you mean this picture they have in the article: http://ichef.bbci.co.uk/wwfeatures/wm/live/624_351/images/live/p0/6q/57/p06q57kj.jpg http://ichef.bbci.co.uk/wwfeatures/wm/live/624_351/images/li... it is. Why wouldn't it be? The single "twist" in the lower right part is the distinctive sign of one.