K11a42

K11a41

K11a43

(Knotscape image)	See the full Hoste-Thistlethwaite Table of 11 Crossing Knots. Visit K11a42 at Knotilus!

Knot presentations

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

A Braid Representative
A Morse Link Presentation

Three dimensional invariants

Symmetry type Reversible Unknotting number $\{1,2\}$ 3-genus 3 Bridge index 3 Super bridge index Missing Nakanishi index Missing Maximal Thurston-Bennequin number Data:K11a42/ThurstonBennequinNumber Hyperbolic Volume 14.5336 A-Polynomial See Data:K11a42/A-polynomial

[edit Notes for K11a42'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 K11a42's four dimensional invariants]

Polynomial invariants

Alexander polynomial	$t^{3}-9t^{2}+26t-35+26t^{-1}-9t^{-2}+t^{-3}$
Conway polynomial	$z^{6}-3z^{4}-z^{2}+1$
2nd Alexander ideal (db, data sources)	$\{1\}$
Determinant and Signature	{ 107, 2 }
Jones polynomial	$-q^{8}+3q^{7}-6q^{6}+11q^{5}-15q^{4}+17q^{3}-17q^{2}+15q-11+7q^{-1}-3q^{-2}+q^{-3}$
HOMFLY-PT polynomial (db, data sources)	$z^{6}a^{-2}+2z^{4}a^{-2}-3z^{4}a^{-4}-2z^{4}+a^{2}z^{2}+3z^{2}a^{-2}-5z^{2}a^{-4}+3z^{2}a^{-6}-3z^{2}+a^{2}+2a^{-2}-3a^{-4}+3a^{-6}-a^{-8}-1$
Kauffman polynomial (db, data sources)	$z^{10}a^{-2}+z^{10}a^{-4}+3z^{9}a^{-1}+6z^{9}a^{-3}+3z^{9}a^{-5}+7z^{8}a^{-2}+7z^{8}a^{-4}+4z^{8}a^{-6}+4z^{8}+3az^{7}-5z^{7}a^{-3}+2z^{7}a^{-5}+4z^{7}a^{-7}+a^{2}z^{6}-15z^{6}a^{-2}-10z^{6}a^{-4}+3z^{6}a^{-8}-7z^{6}-8az^{5}-11z^{5}a^{-1}-5z^{5}a^{-3}-7z^{5}a^{-5}-4z^{5}a^{-7}+z^{5}a^{-9}-3a^{2}z^{4}+4z^{4}a^{-2}-2z^{4}a^{-4}-10z^{4}a^{-6}-6z^{4}a^{-8}-z^{4}+6az^{3}+7z^{3}a^{-1}+5z^{3}a^{-3}+5z^{3}a^{-5}-z^{3}a^{-7}-2z^{3}a^{-9}+3a^{2}z^{2}+3z^{2}a^{-2}+9z^{2}a^{-4}+11z^{2}a^{-6}+4z^{2}a^{-8}+4z^{2}-az-za^{-1}-za^{-3}-za^{-5}+za^{-7}+za^{-9}-a^{2}-2a^{-2}-3a^{-4}-3a^{-6}-a^{-8}-1$
The A2 invariant	Data:K11a42/QuantumInvariant/A2/1,0
The G2 invariant	Data:K11a42/QuantumInvariant/G2/1,0

Further Quantum Invariants

K11a42 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["K11a42"];

In[4]:=

Alexander[K][t]

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

Out[4]=

$t^{3}-9t^{2}+26t-35+26t^{-1}-9t^{-2}+t^{-3}$

In[5]:=

Conway[K][z]

Out[5]=

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

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]=

{ 107, 2 }

In[8]:=

Jones[K][q]

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

Out[8]=

$-q^{8}+3q^{7}-6q^{6}+11q^{5}-15q^{4}+17q^{3}-17q^{2}+15q-11+7q^{-1}-3q^{-2}+q^{-3}$

In[9]:=

HOMFLYPT[K][a, z]

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

Out[9]=

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

In[10]:=

Kauffman[K][a, z]

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

Out[10]=

$z^{10}a^{-2}+z^{10}a^{-4}+3z^{9}a^{-1}+6z^{9}a^{-3}+3z^{9}a^{-5}+7z^{8}a^{-2}+7z^{8}a^{-4}+4z^{8}a^{-6}+4z^{8}+3az^{7}-5z^{7}a^{-3}+2z^{7}a^{-5}+4z^{7}a^{-7}+a^{2}z^{6}-15z^{6}a^{-2}-10z^{6}a^{-4}+3z^{6}a^{-8}-7z^{6}-8az^{5}-11z^{5}a^{-1}-5z^{5}a^{-3}-7z^{5}a^{-5}-4z^{5}a^{-7}+z^{5}a^{-9}-3a^{2}z^{4}+4z^{4}a^{-2}-2z^{4}a^{-4}-10z^{4}a^{-6}-6z^{4}a^{-8}-z^{4}+6az^{3}+7z^{3}a^{-1}+5z^{3}a^{-3}+5z^{3}a^{-5}-z^{3}a^{-7}-2z^{3}a^{-9}+3a^{2}z^{2}+3z^{2}a^{-2}+9z^{2}a^{-4}+11z^{2}a^{-6}+4z^{2}a^{-8}+4z^{2}-az-za^{-1}-za^{-3}-za^{-5}+za^{-7}+za^{-9}-a^{2}-2a^{-2}-3a^{-4}-3a^{-6}-a^{-8}-1$

"Similar" Knots (within the Atlas)

Same Alexander/Conway Polynomial: {}

Same Jones Polynomial (up to mirroring, $q\leftrightarrow q^{-1}$): {K11a10,}

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["K11a42"];

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]=

{ $t^{3}-9t^{2}+26t-35+26t^{-1}-9t^{-2}+t^{-3}$, $-q^{8}+3q^{7}-6q^{6}+11q^{5}-15q^{4}+17q^{3}-17q^{2}+15q-11+7q^{-1}-3q^{-2}+q^{-3}$ }

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]=

{K11a10,}

Vassiliev invariants

V2 and V3:

(-1, 1)

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 $-4$ $8$ $8$ ${\frac {226}{3}}$ ${\frac {86}{3}}$ $-32$ ${\frac {464}{3}}$ ${\frac {32}{3}}$ $72$ $-{\frac {32}{3}}$ $32$ $-{\frac {904}{3}}$ $-{\frac {344}{3}}$ ${\frac {2129}{30}}$ $-{\frac {286}{5}}$ ${\frac {778}{45}}$ ${\frac {1231}{18}}$ $-{\frac {751}{30}}$

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 K11a42. Nonzero entries off the critical diagonals (if any exist) are highlighted in red.

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

Integral Khovanov Homology (db, data source)

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

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.

K11a41 K11a43