Talk:Granny knot (mathematics)

Images

Not sure why File:Blue_Granny_Knot.png isn't just a version of File:Blue_Square_Knot.png, but with the over-under status of crossings on the left half (or right half) of the image just reversed, as I did with http://katlas.math.toronto.edu/wiki/Image:Square-knot-6-crossings.png and http://katlas.math.toronto.edu/wiki/Image:Granny-knot-6-crossings.png over on the Knot Atlas site... AnonMoos (talk) 13:10, 23 March 2010 (UTC)

I agree that something like that would be better. I've been using the 3D viewer on the KnotPlot Site to get the 3D-coordinate lists for POV-Ray, and it gave me this picture for the square knot and this picture for the granny knot, which unfortunately don't look very similar. Switching crossings in a 3-dimensional picture is hard to do—it requires making new coordinate lists by hand—so I decided to make pictures from the KnotPlot lists.

If you upload the pictures you mentioned to the Wikimedia Commons, we could add them to the articles under the main pictures. At least then we would some have pictures for the two knots that looked more similar.

By the way, it would also be nice to have pictures in these articles similar to those on the MathWorld pages for the square knot and the granny knot showing the two trefoils being joined together. Do you know if there are any free versions of pictures like these on the Knot Atlas? Jim (talk) 17:49, 23 March 2010 (UTC)

Added those images in SVG form, as is more suitable for Wikipedia/Wikimedia. The trefoil joining seems kind of obvious, so not sure I see a great need to make elaborate graphics showing it... AnonMoos (talk) 22:33, 23 March 2010 (UTC)