The complexity of lattice knots
β Scribed by Y. Diao; C. Ernst
- Publisher
- Elsevier Science
- Year
- 1998
- Tongue
- English
- Weight
- 429 KB
- Volume
- 90
- Category
- Article
- ISSN
- 0166-8641
No coin nor oath required. For personal study only.
β¦ Synopsis
A family of polygonal knots K, on the cubical lattice is constructed with the property that the quotient of length L(Kn) over the crossing number Cr(Kn) approaches zero as L approaches infinity. More precisely Cr(K,) = 0(L(Kn)4/3).
It is shown that this construction is optimal in the sense that for any knot K on the cubical lattice with length L and Cr crossings Cr < 3.2L413.
π SIMILAR VOLUMES
We study the parametrized complexity of the knot (and link) polynomials known as Jones polynomials, Kauffman polynomials and HOMFLY polynomials. It is known that computing these polynomials is xP hard in general. We look for parameters of the combinatorial presentation of knots and links which make
Let f : Z β {0; 1} be a given function. In 1938, Morse and Hedlund observed that if the number of distinct vectors (f(x + 1); : : : ; f(x + n)), x β Z, called complexity, is at most n for some positive integer n, then f is periodic with period at most n. This result is best possible. Functions with