Conway notation (knot theory)
In knot theory, Conway notation, invented by John Horton Conway,
is a way of describing knots that makes many of their properties clear.
It composes a knot using certain operations on tangles to construct it.
In John Conway's definition, an n-tangle is a proper embedding of the disjoint union of n arcs into a 3-ball;
the embedding must send the endpoints of the arcs to 2n marked points on the ball's boundary.
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