9 3: Difference between revisions
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{{Knot Navigation Links|ext=gif}} |
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{{Vassiliev Invariants}} |
{{Vassiliev Invariants}} |
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{{Khovanov Homology|table=<table border=1> |
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The coefficients of the monomials <math>t^rq^j</math> are shown, along with their alternating sums <math>\chi</math> (fixed <math>j</math>, alternation over <math>r</math>). The squares with <font class=HLYellow>yellow</font> highlighting are those on the "critical diagonals", where <math>j-2r=s+1</math> or <math>j-2r=s+1</math>, where <math>s=</math>{{Data:{{PAGENAME}}/Signature}} is the signature of {{PAGENAME}}. Nonzero entries off the critical diagonals (if any exist) are highlighted in <font class=HLRed>red</font>. |
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<tr align=center><td>7</td><td bgcolor=yellow>1</td><td bgcolor=yellow>1</td><td> </td><td> </td><td> </td><td> </td><td> </td><td> </td><td> </td><td> </td><td>0</td></tr> |
<tr align=center><td>7</td><td bgcolor=yellow>1</td><td bgcolor=yellow>1</td><td> </td><td> </td><td> </td><td> </td><td> </td><td> </td><td> </td><td> </td><td>0</td></tr> |
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<tr align=center><td>5</td><td bgcolor=yellow>1</td><td> </td><td> </td><td> </td><td> </td><td> </td><td> </td><td> </td><td> </td><td> </td><td>1</td></tr> |
<tr align=center><td>5</td><td bgcolor=yellow>1</td><td> </td><td> </td><td> </td><td> </td><td> </td><td> </td><td> </td><td> </td><td> </td><td>1</td></tr> |
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q t + 2 q t + 2 q t + q t + 2 q t + q t + q t</nowiki></pre></td></tr> |
q t + 2 q t + 2 q t + q t + 2 q t + q t + q t</nowiki></pre></td></tr> |
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</table> |
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[[Category:Knot Page]] |
Revision as of 19:08, 28 August 2005
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Visit 9 3's page at the Knot Server (KnotPlot driven, includes 3D interactive images!)
Visit 9 3's page at Knotilus! Visit 9 3's page at the original Knot Atlas! |
Knot presentations
Planar diagram presentation | X8291 X12,4,13,3 X18,10,1,9 X10,18,11,17 X14,6,15,5 X16,8,17,7 X2,12,3,11 X4,14,5,13 X6,16,7,15 |
Gauss code | 1, -7, 2, -8, 5, -9, 6, -1, 3, -4, 7, -2, 8, -5, 9, -6, 4, -3 |
Dowker-Thistlethwaite code | 8 12 14 16 18 2 4 6 10 |
Conway Notation | [63] |
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 |
.
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["9 3"];
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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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{ 19, 6 } |
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: | (9, 26) |
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 6 is the signature of 9 3. Nonzero entries off the critical diagonals (if any exist) are highlighted in red. |
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Integral Khovanov Homology
(db, data source) |
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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[9, 3]] |
Out[2]= | 9 |
In[3]:= | PD[Knot[9, 3]] |
Out[3]= | PD[X[8, 2, 9, 1], X[12, 4, 13, 3], X[18, 10, 1, 9], X[10, 18, 11, 17],X[14, 6, 15, 5], X[16, 8, 17, 7], X[2, 12, 3, 11], X[4, 14, 5, 13],X[6, 16, 7, 15]] |
In[4]:= | GaussCode[Knot[9, 3]] |
Out[4]= | GaussCode[1, -7, 2, -8, 5, -9, 6, -1, 3, -4, 7, -2, 8, -5, 9, -6, 4, -3] |
In[5]:= | BR[Knot[9, 3]] |
Out[5]= | BR[3, {1, 1, 1, 1, 1, 1, 1, 2, -1, 2}] |
In[6]:= | alex = Alexander[Knot[9, 3]][t] |
Out[6]= | 2 3 3 2 3 |
In[7]:= | Conway[Knot[9, 3]][z] |
Out[7]= | 2 4 6 1 + 9 z + 9 z + 2 z |
In[8]:= | Select[AllKnots[], (alex === Alexander[#][t])&] |
Out[8]= | {Knot[9, 3]} |
In[9]:= | {KnotDet[Knot[9, 3]], KnotSignature[Knot[9, 3]]} |
Out[9]= | {19, 6} |
In[10]:= | J=Jones[Knot[9, 3]][q] |
Out[10]= | 3 4 5 6 7 8 9 10 11 12 q - q + 2 q - 2 q + 3 q - 3 q + 3 q - 2 q + q - q |
In[11]:= | Select[AllKnots[], (J === Jones[#][q] || (J /. q-> 1/q) === Jones[#][q])&] |
Out[11]= | {Knot[9, 3]} |
In[12]:= | A2Invariant[Knot[9, 3]][q] |
Out[12]= | 10 14 18 20 22 24 30 32 34 36 q + q + q + q + q + 2 q - q - q - q - q |
In[13]:= | Kauffman[Knot[9, 3]][a, z] |
Out[13]= | 2 2 2 23 3 -6 2 z z z 4 z z 3 z 11 z 9 z |
In[14]:= | {Vassiliev[2][Knot[9, 3]], Vassiliev[3][Knot[9, 3]]} |
Out[14]= | {0, 26} |
In[15]:= | Kh[Knot[9, 3]][q, t] |
Out[15]= | 5 7 7 9 2 11 2 11 3 13 3 13 4 15 4 |