Search results
Results from the WOW.Com Content Network
A Month Later (Dutch: Een maand later), also known as One Month Later, is a 1987 Dutch comedy film directed by Nouchka van Brakel, starring Renée Soutendijk and Monique van de Ven as two women who switch their identites for a month. [1] [2] The film was released in the Netherlands on 17 September 1987 by Warner Bros.
Hara, Tani & Yamamoto (2005) claimed the weaker result that unknotting is in AM ∩ co-AM; however, later they retracted this claim. [1] In 2011, Greg Kuperberg proved that (assuming the generalized Riemann hypothesis ) the unknotting problem is in co-NP , [ 2 ] and in 2016, Marc Lackenby provided an unconditional proof of co-NP membership.
The four half-twist stevedore knot is created by passing the one end of an unknot with four half-twists through the other. All twist knots have unknotting number one, since the knot can be untied by unlinking the two ends. Every twist knot is also a 2-bridge knot. [1] Of the twist knots, only the unknot and the stevedore knot are slice knots. [2]
The reef knot can capsize if one of its standing ends is pulled.. A knot that has capsized or spilled has deformed into a different structure. Although capsizing is sometimes the result of incorrect tying or misuse, it can also be done purposefully in certain cases to strengthen the knot (see the carrick bend [4]) or to untie a seized knot which would otherwise be difficult to release (see ...
To a knot theorist, an unknot is any embedded topological circle in the 3-sphere that is ambient isotopic (that is, deformable) to a geometrically round circle, the standard unknot. The unknot is the only knot that is the boundary of an embedded disk , which gives the characterization that only unknots have Seifert genus 0.
Not Knot is a 16-minute film on the mathematics of knot theory and low-dimensional topology, centered on and titled after the concept of a knot complement.It was produced in 1991 by mathematicians at the Geometry Center at the University of Minnesota, directed by Charlie Gunn and Delle Maxwell, and distributed on videotape with a 48-page paperback booklet of supplementary material by A K Peters.
In physical knot theory, each realization of a link or knot has an associated ropelength. Intuitively this is the minimal length of an ideally flexible rope that is needed to tie a given link, or knot. Knots and links that minimize ropelength are called ideal knots and ideal links respectively. A numeric approximation of an ideal trefoil.
In this coloring the three strands at every crossing have three different colors. Coloring one but not both of the trefoil knots all red would also give an admissible coloring. The true lover's knot is also tricolorable. [4] Tricolorable knots with less than nine crossings include 6 1, 7 4, 7 7, 8 5, 8 10, 8 11, 8 15, 8 18, 8 19, 8 20, and 8 21.