<p>Decorative symmetric knot with eight crossings. The curves were generated from the polar coordinates equation r=b+sin(aθ), which is a slight generalization of the Limaçon and Rose/rhodonea curves, using parameters a=(2/5) and b=(8/5).
</p>
Extends the symmetrical form of the mathematical figure-8 knot (<a href="//commons.wikimedia.org/wiki/File:Figure8knot-rose-limacon-curve.svg" title="File:Figure8knot-rose-limacon-curve.svg">File:Figure8knot-rose-limacon-curve.svg</a>).
AnonMoos
<p>Self-made graphic, generated from the following vector PostScript source-code:
</p>
<pre>%!
300 396 translate -45 rotate 77.5 dup scale .125 setlinewidth .92
.96 1 setrgbcolor/z{{w lineto}for stroke}def/ecc{1.6}def/w{/th
exch def th 2 mul 5 div/x exch def x sin ecc add th cos mul x sin
ecc add th sin mul}def/y{dup w moveto 1 add 1}def 0 y 1800{w
lineto}for closepath gsave 0 setgray .325 setlinewidth stroke
grestore stroke 0 setgray .325 setlinewidth 24 y 68 z 276 y 352 z
472 y 516 z 728 y 800 z 924 y 968 z 1176 y 1252 z 1372 y 1416 z
1628 y 1700 z .125 setlinewidth .92 .96 1 setrgbcolor 23 y 69 z
275 y 353 z 471 y 517 z 727 y 801 z 923 y 969 z 1175 y 1253 z
1371 y 1417 z 1627 y 1701 z showpage
%EOF</pre>