Category:Knots with 2-fold rotational symmetry
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Knots with 2-fold rotational symmetry: if one rotates the knot 180 degrees it looks the same.
Media in category "Knots with 2-fold rotational symmetry"
This category contains only the following file.
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14crossings-decorative-knot-trig-curve.svg 600 × 600; 20 KB