File:9crossings-symmetrical-nonalt.png

Three-fold symmetric non-alternating knot. Compare the alternating knot Image:9crossings-knot-symmetrical.png .

Self-made, declared to be in public domain, generated from the following PostScript source code:

%!
306 396 translate .4 dup scale/x 240 3 sqrt div neg def
24 setlinewidth 1 setgray/A{-120 x 360 210 360 arc 0 x
240 0 180 arc 120 x 360 180 330 arc 60 10800 sqrt rlineto
gsave 60 setlinewidth 0 setgray stroke grestore stroke}def
A gsave 2{120 rotate A}repeat grestore 60 setlinewidth 0
setgray 3{-120 x 360 277 302 arc stroke 0 x 240 109 132
arc stroke 120 rotate}repeat 0 x 240 170 180 arc 120 x 360
180 187 arc stroke 1 setgray 24 setlinewidth 3{-120 x 360
276 303 arc stroke  0 x 240 108 133 arc stroke 120 rotate}
repeat 0 x 240 160 180 arc 120 x 360 180 188 arc stroke
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%EOF