10 49: 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>-25</td><td bgcolor=yellow> </td><td bgcolor=yellow>2</td><td> </td><td> </td><td> </td><td> </td><td> </td><td> </td><td> </td><td> </td><td> </td><td>-2</td></tr> |
<tr align=center><td>-25</td><td bgcolor=yellow> </td><td bgcolor=yellow>2</td><td> </td><td> </td><td> </td><td> </td><td> </td><td> </td><td> </td><td> </td><td> </td><td>-2</td></tr> |
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<tr align=center><td>-27</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> </td><td>1</td></tr> |
<tr align=center><td>-27</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> </td><td>1</td></tr> |
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{{Computer Talk Header}} |
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q t q t q t q t q t</nowiki></pre></td></tr> |
q t q t q t q t q t</nowiki></pre></td></tr> |
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[[Category:Knot Page]] |
Revision as of 19:07, 28 August 2005
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Visit 10 49's page at the Knot Server (KnotPlot driven, includes 3D interactive images!)
Visit 10 49's page at Knotilus! Visit 10 49's page at the original Knot Atlas! |
Knot presentations
Planar diagram presentation | X1425 X3849 X5,14,6,15 X15,20,16,1 X9,16,10,17 X11,18,12,19 X17,10,18,11 X19,12,20,13 X13,6,14,7 X7283 |
Gauss code | -1, 10, -2, 1, -3, 9, -10, 2, -5, 7, -6, 8, -9, 3, -4, 5, -7, 6, -8, 4 |
Dowker-Thistlethwaite code | 4 8 14 2 16 18 6 20 10 12 |
Conway Notation | [41,21,2] |
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 |
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 |
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["10 49"];
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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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{ 59, -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: | (7, -16) |
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 10 49. 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[10, 49]] |
Out[2]= | 10 |
In[3]:= | PD[Knot[10, 49]] |
Out[3]= | PD[X[1, 4, 2, 5], X[3, 8, 4, 9], X[5, 14, 6, 15], X[15, 20, 16, 1],X[9, 16, 10, 17], X[11, 18, 12, 19], X[17, 10, 18, 11],X[19, 12, 20, 13], X[13, 6, 14, 7], X[7, 2, 8, 3]] |
In[4]:= | GaussCode[Knot[10, 49]] |
Out[4]= | GaussCode[-1, 10, -2, 1, -3, 9, -10, 2, -5, 7, -6, 8, -9, 3, -4, 5, -7, 6, -8, 4] |
In[5]:= | BR[Knot[10, 49]] |
Out[5]= | BR[4, {-1, -1, -1, -1, 2, -1, -3, -2, -2, -2, -3}] |
In[6]:= | alex = Alexander[Knot[10, 49]][t] |
Out[6]= | 3 8 12 2 3 |
In[7]:= | Conway[Knot[10, 49]][z] |
Out[7]= | 2 4 6 1 + 7 z + 10 z + 3 z |
In[8]:= | Select[AllKnots[], (alex === Alexander[#][t])&] |
Out[8]= | {Knot[10, 49]} |
In[9]:= | {KnotDet[Knot[10, 49]], KnotSignature[Knot[10, 49]]} |
Out[9]= | {59, -6} |
In[10]:= | J=Jones[Knot[10, 49]][q] |
Out[10]= | -13 3 5 8 9 10 9 6 5 2 -3 |
In[11]:= | Select[AllKnots[], (J === Jones[#][q] || (J /. q-> 1/q) === Jones[#][q])&] |
Out[11]= | {Knot[10, 49]} |
In[12]:= | A2Invariant[Knot[10, 49]][q] |
Out[12]= | -40 -38 -36 3 2 -28 2 3 3 2 2 |
In[13]:= | Kauffman[Knot[10, 49]][a, z] |
Out[13]= | 6 8 10 12 9 11 15 6 2 |
In[14]:= | {Vassiliev[2][Knot[10, 49]], Vassiliev[3][Knot[10, 49]]} |
Out[14]= | {0, -16} |
In[15]:= | Kh[Knot[10, 49]][q, t] |
Out[15]= | -7 -5 1 2 1 3 2 5 |