10 91
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Visit 10 91's page at Knotilus! Visit 10 91's page at the original Knot Atlas! |
10 91 Quick Notes |
Knot presentations
Planar diagram presentation | X6271 X20,6,1,5 X16,9,17,10 X10,3,11,4 X2,18,3,17 X14,7,15,8 X8,15,9,16 X12,20,13,19 X18,12,19,11 X4,13,5,14 |
Gauss code | 1, -5, 4, -10, 2, -1, 6, -7, 3, -4, 9, -8, 10, -6, 7, -3, 5, -9, 8, -2 |
Dowker-Thistlethwaite code | 6 10 20 14 16 18 4 8 2 12 |
Conway Notation | [.3.2.20] |
Three dimensional invariants
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Four dimensional invariants
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Polynomial invariants
A1 Invariants.
Weight | Invariant |
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1 | |
2 | |
3 | |
4 | |
5 | |
6 |
A2 Invariants.
Weight | Invariant |
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1,0 | |
1,1 | |
2,0 |
A3 Invariants.
Weight | Invariant |
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0,1,0 | |
1,0,0 | |
1,0,1 |
A4 Invariants.
Weight | Invariant |
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0,1,0,0 | |
1,0,0,0 |
B2 Invariants.
Weight | Invariant |
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0,1 | |
1,0 |
D4 Invariants.
Weight | Invariant |
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1,0,0,0 |
G2 Invariants.
Weight | Invariant |
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1,0 |
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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]:=
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AppendTo[$Path, "C:/drorbn/projects/KAtlas/"];
<< KnotTheory`
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Loading KnotTheory` version of August 31, 2006, 11:25:27.5625.
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In[3]:=
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K = Knot["10 91"];
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In[4]:=
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Alexander[K][t]
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KnotTheory::loading: Loading precomputed data in PD4Knots`.
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Out[4]=
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In[5]:=
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Conway[K][z]
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Out[5]=
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In[6]:=
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Alexander[K, 2][t]
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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.
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Out[6]=
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In[7]:=
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{KnotDet[K], KnotSignature[K]}
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Out[7]=
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{ 73, 0 } |
In[8]:=
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Jones[K][q]
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KnotTheory::loading: Loading precomputed data in Jones4Knots`.
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Out[8]=
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In[9]:=
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HOMFLYPT[K][a, z]
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KnotTheory::credits: The HOMFLYPT program was written by Scott Morrison.
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Out[9]=
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In[10]:=
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Kauffman[K][a, z]
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KnotTheory::loading: Loading precomputed data in Kauffman4Knots`.
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Out[10]=
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Vassiliev invariants
V2 and V3: | (2, 0) |
V2,1 through V6,9: |
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V2,1 through V6,9 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 are shown, along with their alternating sums (fixed , alternation over ). The squares with yellow highlighting are those on the "critical diagonals", where or , where 0 is the signature of 10 91. Nonzero entries off the critical diagonals (if any exist) are highlighted in red.
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-5 | -4 | -3 | -2 | -1 | 0 | 1 | 2 | 3 | 4 | 5 | χ | |||||||||
11 | 1 | -1 | |||||||||||||||||||
9 | 2 | 2 | |||||||||||||||||||
7 | 4 | 1 | -3 | ||||||||||||||||||
5 | 5 | 2 | 3 | ||||||||||||||||||
3 | 6 | 4 | -2 | ||||||||||||||||||
1 | 7 | 5 | 2 | ||||||||||||||||||
-1 | 5 | 7 | 2 | ||||||||||||||||||
-3 | 4 | 6 | -2 | ||||||||||||||||||
-5 | 2 | 5 | 3 | ||||||||||||||||||
-7 | 1 | 4 | -3 | ||||||||||||||||||
-9 | 2 | 2 | |||||||||||||||||||
-11 | 1 | -1 |
Computer Talk
Much of the above data can be recomputed by Mathematica using the package KnotTheory`
. See A Sample KnotTheory` Session.
In[1]:= |
<< KnotTheory` |
Loading KnotTheory` (version of August 17, 2005, 14:44:34)... | |
In[2]:= | Crossings[Knot[10, 91]] |
Out[2]= | 10 |
In[3]:= | PD[Knot[10, 91]] |
Out[3]= | PD[X[6, 2, 7, 1], X[20, 6, 1, 5], X[16, 9, 17, 10], X[10, 3, 11, 4],X[2, 18, 3, 17], X[14, 7, 15, 8], X[8, 15, 9, 16], X[12, 20, 13, 19],X[18, 12, 19, 11], X[4, 13, 5, 14]] |
In[4]:= | GaussCode[Knot[10, 91]] |
Out[4]= | GaussCode[1, -5, 4, -10, 2, -1, 6, -7, 3, -4, 9, -8, 10, -6, 7, -3, 5, -9, 8, -2] |
In[5]:= | BR[Knot[10, 91]] |
Out[5]= | BR[3, {-1, -1, -1, 2, -1, 2, 2, -1, 2, 2}] |
In[6]:= | alex = Alexander[Knot[10, 91]][t] |
Out[6]= | -4 4 9 14 2 3 4 |
In[7]:= | Conway[Knot[10, 91]][z] |
Out[7]= | 2 4 6 8 1 + 2 z + 5 z + 4 z + z |
In[8]:= | Select[AllKnots[], (alex === Alexander[#][t])&] |
Out[8]= | {Knot[10, 91]} |
In[9]:= | {KnotDet[Knot[10, 91]], KnotSignature[Knot[10, 91]]} |
Out[9]= | {73, 0} |
In[10]:= | J=Jones[Knot[10, 91]][q] |
Out[10]= | -5 3 6 9 11 2 3 4 5 |
In[11]:= | Select[AllKnots[], (J === Jones[#][q] || (J /. q-> 1/q) === Jones[#][q])&] |
Out[11]= | {Knot[10, 43], Knot[10, 91]} |
In[12]:= | A2Invariant[Knot[10, 91]][q] |
Out[12]= | -14 -12 2 -8 -4 4 2 4 8 10 |
In[13]:= | Kauffman[Knot[10, 91]][a, z] |
Out[13]= | 2 22 2 3 z 6 z 5 2 z 9 z |
In[14]:= | {Vassiliev[2][Knot[10, 91]], Vassiliev[3][Knot[10, 91]]} |
Out[14]= | {0, 0} |
In[15]:= | Kh[Knot[10, 91]][q, t] |
Out[15]= | 7 1 2 1 4 2 5 4 |