The Square Knot is the so called knot sum of two mirror symmetric
Trefoil Knots.
Square Knot, rotating around a vertical axis.
Note that the square knot is symmetric with respect to the origin. It has 180
degree rotation symmetry about the x-axis and the composition of these two symmetries
is reflection in the y-z-plane. Compare with the
Granny Knot.
Square Knot, rotating view. (anaglyph)
