K11a18

K11a17

K11a19

(Knotscape image)	See the full Hoste-Thistlethwaite Table of 11 Crossing Knots. Visit K11a18 at Knotilus!

Knot presentations

Planar diagram presentation	X4251 X8493 X12,6,13,5 X2837 X16,10,17,9 X6,12,7,11 X20,13,21,14 X18,16,19,15 X10,18,11,17 X22,19,1,20 X14,21,15,22
Gauss code	1, -4, 2, -1, 3, -6, 4, -2, 5, -9, 6, -3, 7, -11, 8, -5, 9, -8, 10, -7, 11, -10
Dowker-Thistlethwaite code	4 8 12 2 16 6 20 18 10 22 14

A Braid Representative
A Morse Link Presentation

Three dimensional invariants

Symmetry type Chiral Unknotting number $\{1,2,3\}$ 3-genus 3 Bridge index 3 Super bridge index Missing Nakanishi index Missing Maximal Thurston-Bennequin number Data:K11a18/ThurstonBennequinNumber Hyperbolic Volume 16.03 A-Polynomial See Data:K11a18/A-polynomial

[edit Notes for K11a18's three dimensional invariants]

Four dimensional invariants

Smooth 4 genus Missing Topological 4 genus Missing Concordance genus $3$ Rasmussen s-Invariant -2

[edit Notes for K11a18's four dimensional invariants]

Polynomial invariants

Alexander polynomial	$3t^{3}-13t^{2}+29t-37+29t^{-1}-13t^{-2}+3t^{-3}$
Conway polynomial	$3z^{6}+5z^{4}+4z^{2}+1$
2nd Alexander ideal (db, data sources)	$\{1\}$
Determinant and Signature	{ 127, 2 }
Jones polynomial	$q^{9}-4q^{8}+8q^{7}-14q^{6}+18q^{5}-20q^{4}+21q^{3}-17q^{2}+13q-7+3q^{-1}-q^{-2}$
HOMFLY-PT polynomial (db, data sources)	$z^{6}a^{-2}+2z^{6}a^{-4}+2z^{4}a^{-2}+7z^{4}a^{-4}-3z^{4}a^{-6}-z^{4}+2z^{2}a^{-2}+10z^{2}a^{-4}-7z^{2}a^{-6}+z^{2}a^{-8}-2z^{2}+a^{-2}+5a^{-4}-5a^{-6}+a^{-8}-1$
Kauffman polynomial (db, data sources)	$z^{10}a^{-4}+z^{10}a^{-6}+4z^{9}a^{-3}+8z^{9}a^{-5}+4z^{9}a^{-7}+6z^{8}a^{-2}+15z^{8}a^{-4}+15z^{8}a^{-6}+6z^{8}a^{-8}+5z^{7}a^{-1}+5z^{7}a^{-3}+4z^{7}a^{-7}+4z^{7}a^{-9}-6z^{6}a^{-2}-35z^{6}a^{-4}-39z^{6}a^{-6}-12z^{6}a^{-8}+z^{6}a^{-10}+3z^{6}+az^{5}-6z^{5}a^{-1}-20z^{5}a^{-3}-33z^{5}a^{-5}-30z^{5}a^{-7}-10z^{5}a^{-9}+2z^{4}a^{-2}+31z^{4}a^{-4}+31z^{4}a^{-6}+5z^{4}a^{-8}-2z^{4}a^{-10}-5z^{4}-2az^{3}+2z^{3}a^{-1}+20z^{3}a^{-3}+38z^{3}a^{-5}+30z^{3}a^{-7}+8z^{3}a^{-9}+z^{2}a^{-2}-15z^{2}a^{-4}-15z^{2}a^{-6}-z^{2}a^{-8}+z^{2}a^{-10}+3z^{2}+az-6za^{-3}-14za^{-5}-11za^{-7}-2za^{-9}-a^{-2}+5a^{-4}+5a^{-6}+a^{-8}-1$
The A2 invariant	Data:K11a18/QuantumInvariant/A2/1,0
The G2 invariant	Data:K11a18/QuantumInvariant/G2/1,0

Further Quantum Invariants

K11a18 Quantum Invariants.

Computer Talk

The above data is available with the Mathematica package KnotTheory`, as shown in the (simulated) Mathematica session below. Your input (in red) is realistic; all else should have the same content as in a real mathematica session, but with different formatting. This Mathematica session is also available (albeit only for the knot 5_2) as the notebook PolynomialInvariantsSession.nb.

(The path below may be different on your system, and possibly also the KnotTheory` date)

In[1]:=

AppendTo[$Path, "C:/drorbn/projects/KAtlas/"]; << KnotTheory`

Loading KnotTheory` version of August 31, 2006, 11:25:27.5625. Read more at http://katlas.math.toronto.edu/wiki/KnotTheory.

In[3]:=

K = Knot["K11a18"];

In[4]:=

Alexander[K][t]

KnotTheory::loading: Loading precomputed data in PD4Knots`.

Out[4]=

$3t^{3}-13t^{2}+29t-37+29t^{-1}-13t^{-2}+3t^{-3}$

In[5]:=

Conway[K][z]

Out[5]=

$3z^{6}+5z^{4}+4z^{2}+1$

In[6]:=

Alexander[K, 2][t]

KnotTheory::credits: The program Alexander[K, r] to compute Alexander ideals was written by Jana Archibald at the University of Toronto in the summer of 2005.

Out[6]=

$\{1\}$

In[7]:=

{KnotDet[K], KnotSignature[K]}

Out[7]=

{ 127, 2 }

In[8]:=

Jones[K][q]

KnotTheory::loading: Loading precomputed data in Jones4Knots`.

Out[8]=

$q^{9}-4q^{8}+8q^{7}-14q^{6}+18q^{5}-20q^{4}+21q^{3}-17q^{2}+13q-7+3q^{-1}-q^{-2}$

In[9]:=

HOMFLYPT[K][a, z]

KnotTheory::credits: The HOMFLYPT program was written by Scott Morrison.

Out[9]=

$z^{6}a^{-2}+2z^{6}a^{-4}+2z^{4}a^{-2}+7z^{4}a^{-4}-3z^{4}a^{-6}-z^{4}+2z^{2}a^{-2}+10z^{2}a^{-4}-7z^{2}a^{-6}+z^{2}a^{-8}-2z^{2}+a^{-2}+5a^{-4}-5a^{-6}+a^{-8}-1$

In[10]:=

Kauffman[K][a, z]

KnotTheory::loading: Loading precomputed data in Kauffman4Knots`.

Out[10]=

$z^{10}a^{-4}+z^{10}a^{-6}+4z^{9}a^{-3}+8z^{9}a^{-5}+4z^{9}a^{-7}+6z^{8}a^{-2}+15z^{8}a^{-4}+15z^{8}a^{-6}+6z^{8}a^{-8}+5z^{7}a^{-1}+5z^{7}a^{-3}+4z^{7}a^{-7}+4z^{7}a^{-9}-6z^{6}a^{-2}-35z^{6}a^{-4}-39z^{6}a^{-6}-12z^{6}a^{-8}+z^{6}a^{-10}+3z^{6}+az^{5}-6z^{5}a^{-1}-20z^{5}a^{-3}-33z^{5}a^{-5}-30z^{5}a^{-7}-10z^{5}a^{-9}+2z^{4}a^{-2}+31z^{4}a^{-4}+31z^{4}a^{-6}+5z^{4}a^{-8}-2z^{4}a^{-10}-5z^{4}-2az^{3}+2z^{3}a^{-1}+20z^{3}a^{-3}+38z^{3}a^{-5}+30z^{3}a^{-7}+8z^{3}a^{-9}+z^{2}a^{-2}-15z^{2}a^{-4}-15z^{2}a^{-6}-z^{2}a^{-8}+z^{2}a^{-10}+3z^{2}+az-6za^{-3}-14za^{-5}-11za^{-7}-2za^{-9}-a^{-2}+5a^{-4}+5a^{-6}+a^{-8}-1$

"Similar" Knots (within the Atlas)

Same Alexander/Conway Polynomial: {}

Same Jones Polynomial (up to mirroring, $q\leftrightarrow q^{-1}$): {}

Computer Talk

The above data is available with the Mathematica package KnotTheory`. Your input (in red) is realistic; all else should have the same content as in a real mathematica session, but with different formatting.

(The path below may be different on your system, and possibly also the KnotTheory` date)

In[1]:=

AppendTo[$Path, "C:/drorbn/projects/KAtlas/"]; << KnotTheory`

Loading KnotTheory` version of May 31, 2006, 14:15:20.091. Read more at http://katlas.math.toronto.edu/wiki/KnotTheory.

In[3]:=

K = Knot["K11a18"];

In[4]:=

{A = Alexander[K][t], J = Jones[K][q]}

KnotTheory::loading: Loading precomputed data in PD4Knots`.

KnotTheory::loading: Loading precomputed data in Jones4Knots`.

Out[4]=

{ $3t^{3}-13t^{2}+29t-37+29t^{-1}-13t^{-2}+3t^{-3}$, $q^{9}-4q^{8}+8q^{7}-14q^{6}+18q^{5}-20q^{4}+21q^{3}-17q^{2}+13q-7+3q^{-1}-q^{-2}$ }

In[5]:=

DeleteCases[Select[AllKnots[], (A === Alexander[#][t]) &], K]

KnotTheory::loading: Loading precomputed data in DTCode4KnotsTo11`.

KnotTheory::credits: The GaussCode to PD conversion was written by Siddarth Sankaran at the University of Toronto in the summer of 2005.

Out[5]=

{}

In[6]:=

DeleteCases[ Select[ AllKnots[], (J === Jones[#][q] || (J /. q -> 1/q) === Jones[#][q]) & ], K ]

KnotTheory::loading: Loading precomputed data in Jones4Knots11`.

Out[6]=

{}

Vassiliev invariants

V2 and V3:

(4, 5)

V2,1 through V6,9:

V2,1 V3,1 V4,1 V4,2 V4,3 V5,1 V5,2 V5,3 V5,4 V6,1 V6,2 V6,3 V6,4 V6,5 V6,6 V6,7 V6,8 V6,9 $16$ $40$ $128$ ${\frac {584}{3}}$ ${\frac {64}{3}}$ $640$ ${\frac {2704}{3}}$ ${\frac {448}{3}}$ $104$ ${\frac {2048}{3}}$ $800$ ${\frac {9344}{3}}$ ${\frac {1024}{3}}$ ${\frac {69302}{15}}$ ${\frac {4432}{15}}$ ${\frac {66128}{45}}$ ${\frac {298}{9}}$ ${\frac {2342}{15}}$

V_2,1 through V_6,9 were provided by Petr Dunin-Barkowski <barkovs@itep.ru>, Andrey Smirnov <asmirnov@itep.ru>, and Alexei Sleptsov <sleptsov@itep.ru> and uploaded on October 2010 by User:Drorbn. Note that they are normalized differently than V₂ and V₃.

Khovanov Homology

The coefficients of the monomials $t^{r}q^{j}$ are shown, along with their alternating sums $\chi$ (fixed $j$, alternation over $r$). The squares with yellow highlighting are those on the "critical diagonals", where $j-2r=s+1$ or $j-2r=s-1$, where $s=$2 is the signature of K11a18. Nonzero entries off the critical diagonals (if any exist) are highlighted in red.

\   r    \    j   \ -3 -2 -1 0 1 2 3 4 5 6 7 8 χ 19                       1 1 17                     3   -3 15                   5 1   4 13                 9 3     -6 11               9 5       4 9             11 9         -2 7           10 9           1 5         7 11             4 3       6 10               -4 1     2 8                 6 -1   1 5                   -4 -3   2                     2 -5 1                       -1

Integral Khovanov Homology (db, data source)

$\dim {\mathcal {G}}_{2r+i}\operatorname {KH} _{\mathbb {Z} }^{r}$ $i=1$ $i=3$ $r=-3$ ${\mathbb {Z} }$ $r=-2$ ${\mathbb {Z} }^{2}\oplus {\mathbb {Z} }_{2}$ ${\mathbb {Z} }$ $r=-1$ ${\mathbb {Z} }^{5}\oplus {\mathbb {Z} }_{2}^{2}$ ${\mathbb {Z} }^{2}$ $r=0$ ${\mathbb {Z} }^{8}\oplus {\mathbb {Z} }_{2}^{5}$ ${\mathbb {Z} }^{6}$ $r=1$ ${\mathbb {Z} }^{10}\oplus {\mathbb {Z} }_{2}^{7}$ ${\mathbb {Z} }^{7}$ $r=2$ ${\mathbb {Z} }^{11}\oplus {\mathbb {Z} }_{2}^{10}$ ${\mathbb {Z} }^{10}$ $r=3$ ${\mathbb {Z} }^{9}\oplus {\mathbb {Z} }_{2}^{11}$ ${\mathbb {Z} }^{11}$ $r=4$ ${\mathbb {Z} }^{9}\oplus {\mathbb {Z} }_{2}^{9}$ ${\mathbb {Z} }^{9}$ $r=5$ ${\mathbb {Z} }^{5}\oplus {\mathbb {Z} }_{2}^{9}$ ${\mathbb {Z} }^{9}$ $r=6$ ${\mathbb {Z} }^{3}\oplus {\mathbb {Z} }_{2}^{5}$ ${\mathbb {Z} }^{5}$ $r=7$ ${\mathbb {Z} }\oplus {\mathbb {Z} }_{2}^{3}$ ${\mathbb {Z} }^{3}$ $r=8$ ${\mathbb {Z} }_{2}$ ${\mathbb {Z} }$

Computer Talk

Much of the above data can be recomputed by Mathematica using the package KnotTheory`. See A Sample KnotTheory` Session.

Modifying This Page

Read me first: Modifying Knot Pages. See/edit the Hoste-Thistlethwaite Knot Page master template (intermediate). See/edit the Hoste-Thistlethwaite_Splice_Base (expert). Back to the top.

K11a17 K11a19