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Questions tagged [stick-knots]

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26 votes
5 answers
2k views

Complexity of random knot with vertices on sphere

Connect $n$ random points on a sphere in a cycle of segments between succesive points: I would like to know the growth rate, with respect to $n$, of the crossing number (the minimal number of ...
Joseph O'Rourke's user avatar
3 votes
1 answer
394 views

Min Bend Orthogonal Knots

I am seeking literature on 3D orthogonal drawings of knots, especially minimum bend drawings. An orthogonal drawing employs segments parallel to the axes of a Cartesian coordinate system. A bend is a ...
Joseph O'Rourke's user avatar
30 votes
3 answers
2k views

Random knot on six vertices

This question is inspired by Joseph O'Rourke's beautiful question on random knots. Choose an random ordered 6-tuple of points on the unit sphere in $\mathbf{R}^3$, and form a knot by connecting ...
David Hansen's user avatar
  • 13.1k
7 votes
1 answer
938 views

Which knots' stick numbers are twice their crossing numbers?

Looking at a table of minimum stick numbers for knots (table here), it seems the known upper bound of $2 c(K)$ in terms of the knot crossing number $c(K)$ is realized by the trefoil $3_1$—it ...
Joseph O'Rourke's user avatar