T(17,2)

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T(8,3).jpg

T(8,3)

T(19,2).jpg

T(19,2)

T(17,2).jpg See other torus knots

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Knot presentations

Planar diagram presentation X15,33,16,32 X33,17,34,16 X17,1,18,34 X1,19,2,18 X19,3,20,2 X3,21,4,20 X21,5,22,4 X5,23,6,22 X23,7,24,6 X7,25,8,24 X25,9,26,8 X9,27,10,26 X27,11,28,10 X11,29,12,28 X29,13,30,12 X13,31,14,30 X31,15,32,14
Gauss code -4, 5, -6, 7, -8, 9, -10, 11, -12, 13, -14, 15, -16, 17, -1, 2, -3, 4, -5, 6, -7, 8, -9, 10, -11, 12, -13, 14, -15, 16, -17, 1, -2, 3
Dowker-Thistlethwaite code 18 20 22 24 26 28 30 32 34 2 4 6 8 10 12 14 16
Braid presentation
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BraidPart2.gifBraidPart2.gifBraidPart2.gifBraidPart2.gifBraidPart2.gifBraidPart2.gifBraidPart2.gifBraidPart2.gifBraidPart2.gifBraidPart2.gifBraidPart2.gifBraidPart2.gifBraidPart2.gifBraidPart2.gifBraidPart2.gifBraidPart2.gifBraidPart2.gif

Polynomial invariants

Alexander polynomial [math]\displaystyle{ t^8-t^7+t^6-t^5+t^4-t^3+t^2-t+1- t^{-1} + t^{-2} - t^{-3} + t^{-4} - t^{-5} + t^{-6} - t^{-7} + t^{-8} }[/math]
Conway polynomial [math]\displaystyle{ z^{16}+15 z^{14}+91 z^{12}+286 z^{10}+495 z^8+462 z^6+210 z^4+36 z^2+1 }[/math]
2nd Alexander ideal (db, data sources) [math]\displaystyle{ \{1\} }[/math]
Determinant and Signature { 17, 16 }
Jones polynomial [math]\displaystyle{ -q^{25}+q^{24}-q^{23}+q^{22}-q^{21}+q^{20}-q^{19}+q^{18}-q^{17}+q^{16}-q^{15}+q^{14}-q^{13}+q^{12}-q^{11}+q^{10}+q^8 }[/math]
HOMFLY-PT polynomial (db, data sources) [math]\displaystyle{ z^{16} a^{-16} +16 z^{14} a^{-16} -z^{14} a^{-18} +105 z^{12} a^{-16} -14 z^{12} a^{-18} +364 z^{10} a^{-16} -78 z^{10} a^{-18} +715 z^8 a^{-16} -220 z^8 a^{-18} +792 z^6 a^{-16} -330 z^6 a^{-18} +462 z^4 a^{-16} -252 z^4 a^{-18} +120 z^2 a^{-16} -84 z^2 a^{-18} +9 a^{-16} -8 a^{-18} }[/math]
Kauffman polynomial (db, data sources) [math]\displaystyle{ z^{16} a^{-16} +z^{16} a^{-18} +z^{15} a^{-17} +z^{15} a^{-19} -16 z^{14} a^{-16} -15 z^{14} a^{-18} +z^{14} a^{-20} -14 z^{13} a^{-17} -13 z^{13} a^{-19} +z^{13} a^{-21} +105 z^{12} a^{-16} +92 z^{12} a^{-18} -12 z^{12} a^{-20} +z^{12} a^{-22} +78 z^{11} a^{-17} +66 z^{11} a^{-19} -11 z^{11} a^{-21} +z^{11} a^{-23} -364 z^{10} a^{-16} -298 z^{10} a^{-18} +55 z^{10} a^{-20} -10 z^{10} a^{-22} +z^{10} a^{-24} -220 z^9 a^{-17} -165 z^9 a^{-19} +45 z^9 a^{-21} -9 z^9 a^{-23} +z^9 a^{-25} +715 z^8 a^{-16} +550 z^8 a^{-18} -120 z^8 a^{-20} +36 z^8 a^{-22} -8 z^8 a^{-24} +z^8 a^{-26} +330 z^7 a^{-17} +210 z^7 a^{-19} -84 z^7 a^{-21} +28 z^7 a^{-23} -7 z^7 a^{-25} +z^7 a^{-27} -792 z^6 a^{-16} -582 z^6 a^{-18} +126 z^6 a^{-20} -56 z^6 a^{-22} +21 z^6 a^{-24} -6 z^6 a^{-26} +z^6 a^{-28} -252 z^5 a^{-17} -126 z^5 a^{-19} +70 z^5 a^{-21} -35 z^5 a^{-23} +15 z^5 a^{-25} -5 z^5 a^{-27} +z^5 a^{-29} +462 z^4 a^{-16} +336 z^4 a^{-18} -56 z^4 a^{-20} +35 z^4 a^{-22} -20 z^4 a^{-24} +10 z^4 a^{-26} -4 z^4 a^{-28} +z^4 a^{-30} +84 z^3 a^{-17} +28 z^3 a^{-19} -21 z^3 a^{-21} +15 z^3 a^{-23} -10 z^3 a^{-25} +6 z^3 a^{-27} -3 z^3 a^{-29} +z^3 a^{-31} -120 z^2 a^{-16} -92 z^2 a^{-18} +7 z^2 a^{-20} -6 z^2 a^{-22} +5 z^2 a^{-24} -4 z^2 a^{-26} +3 z^2 a^{-28} -2 z^2 a^{-30} +z^2 a^{-32} -8 z a^{-17} -z a^{-19} +z a^{-21} -z a^{-23} +z a^{-25} -z a^{-27} +z a^{-29} -z a^{-31} +z a^{-33} +9 a^{-16} +8 a^{-18} }[/math]
The A2 invariant Data:T(17,2)/QuantumInvariant/A2/1,0
The G2 invariant Data:T(17,2)/QuantumInvariant/G2/1,0
Further Quantum Invariants
T(17,2) 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["T(17,2)"];
In[4]:= Alexander[K][t]
KnotTheory::loading: Loading precomputed data in PD4Knots`.
Out[4]= [math]\displaystyle{ t^8-t^7+t^6-t^5+t^4-t^3+t^2-t+1- t^{-1} + t^{-2} - t^{-3} + t^{-4} - t^{-5} + t^{-6} - t^{-7} + t^{-8} }[/math]
In[5]:= Conway[K][z]
Out[5]= [math]\displaystyle{ z^{16}+15 z^{14}+91 z^{12}+286 z^{10}+495 z^8+462 z^6+210 z^4+36 z^2+1 }[/math]
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]= [math]\displaystyle{ \{1\} }[/math]
In[7]:= {KnotDet[K], KnotSignature[K]}
Out[7]= { 17, 16 }
In[8]:= Jones[K][q]
KnotTheory::loading: Loading precomputed data in Jones4Knots`.
Out[8]= [math]\displaystyle{ -q^{25}+q^{24}-q^{23}+q^{22}-q^{21}+q^{20}-q^{19}+q^{18}-q^{17}+q^{16}-q^{15}+q^{14}-q^{13}+q^{12}-q^{11}+q^{10}+q^8 }[/math]
In[9]:= HOMFLYPT[K][a, z]
KnotTheory::credits: The HOMFLYPT program was written by Scott Morrison.
Out[9]= [math]\displaystyle{ z^{16} a^{-16} +16 z^{14} a^{-16} -z^{14} a^{-18} +105 z^{12} a^{-16} -14 z^{12} a^{-18} +364 z^{10} a^{-16} -78 z^{10} a^{-18} +715 z^8 a^{-16} -220 z^8 a^{-18} +792 z^6 a^{-16} -330 z^6 a^{-18} +462 z^4 a^{-16} -252 z^4 a^{-18} +120 z^2 a^{-16} -84 z^2 a^{-18} +9 a^{-16} -8 a^{-18} }[/math]
In[10]:= Kauffman[K][a, z]
KnotTheory::loading: Loading precomputed data in Kauffman4Knots`.
Out[10]= [math]\displaystyle{ z^{16} a^{-16} +z^{16} a^{-18} +z^{15} a^{-17} +z^{15} a^{-19} -16 z^{14} a^{-16} -15 z^{14} a^{-18} +z^{14} a^{-20} -14 z^{13} a^{-17} -13 z^{13} a^{-19} +z^{13} a^{-21} +105 z^{12} a^{-16} +92 z^{12} a^{-18} -12 z^{12} a^{-20} +z^{12} a^{-22} +78 z^{11} a^{-17} +66 z^{11} a^{-19} -11 z^{11} a^{-21} +z^{11} a^{-23} -364 z^{10} a^{-16} -298 z^{10} a^{-18} +55 z^{10} a^{-20} -10 z^{10} a^{-22} +z^{10} a^{-24} -220 z^9 a^{-17} -165 z^9 a^{-19} +45 z^9 a^{-21} -9 z^9 a^{-23} +z^9 a^{-25} +715 z^8 a^{-16} +550 z^8 a^{-18} -120 z^8 a^{-20} +36 z^8 a^{-22} -8 z^8 a^{-24} +z^8 a^{-26} +330 z^7 a^{-17} +210 z^7 a^{-19} -84 z^7 a^{-21} +28 z^7 a^{-23} -7 z^7 a^{-25} +z^7 a^{-27} -792 z^6 a^{-16} -582 z^6 a^{-18} +126 z^6 a^{-20} -56 z^6 a^{-22} +21 z^6 a^{-24} -6 z^6 a^{-26} +z^6 a^{-28} -252 z^5 a^{-17} -126 z^5 a^{-19} +70 z^5 a^{-21} -35 z^5 a^{-23} +15 z^5 a^{-25} -5 z^5 a^{-27} +z^5 a^{-29} +462 z^4 a^{-16} +336 z^4 a^{-18} -56 z^4 a^{-20} +35 z^4 a^{-22} -20 z^4 a^{-24} +10 z^4 a^{-26} -4 z^4 a^{-28} +z^4 a^{-30} +84 z^3 a^{-17} +28 z^3 a^{-19} -21 z^3 a^{-21} +15 z^3 a^{-23} -10 z^3 a^{-25} +6 z^3 a^{-27} -3 z^3 a^{-29} +z^3 a^{-31} -120 z^2 a^{-16} -92 z^2 a^{-18} +7 z^2 a^{-20} -6 z^2 a^{-22} +5 z^2 a^{-24} -4 z^2 a^{-26} +3 z^2 a^{-28} -2 z^2 a^{-30} +z^2 a^{-32} -8 z a^{-17} -z a^{-19} +z a^{-21} -z a^{-23} +z a^{-25} -z a^{-27} +z a^{-29} -z a^{-31} +z a^{-33} +9 a^{-16} +8 a^{-18} }[/math]

"Similar" Knots (within the Atlas)

Same Alexander/Conway Polynomial: {}

Same Jones Polynomial (up to mirroring, [math]\displaystyle{ q\leftrightarrow q^{-1} }[/math]): {}

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["T(17,2)"];
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]= { [math]\displaystyle{ t^8-t^7+t^6-t^5+t^4-t^3+t^2-t+1- t^{-1} + t^{-2} - t^{-3} + t^{-4} - t^{-5} + t^{-6} - t^{-7} + t^{-8} }[/math], [math]\displaystyle{ -q^{25}+q^{24}-q^{23}+q^{22}-q^{21}+q^{20}-q^{19}+q^{18}-q^{17}+q^{16}-q^{15}+q^{14}-q^{13}+q^{12}-q^{11}+q^{10}+q^8 }[/math] }
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: (36, 204)
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
Data:T(17,2)/V 2,1 Data:T(17,2)/V 3,1 Data:T(17,2)/V 4,1 Data:T(17,2)/V 4,2 Data:T(17,2)/V 4,3 Data:T(17,2)/V 5,1 Data:T(17,2)/V 5,2 Data:T(17,2)/V 5,3 Data:T(17,2)/V 5,4 Data:T(17,2)/V 6,1 Data:T(17,2)/V 6,2 Data:T(17,2)/V 6,3 Data:T(17,2)/V 6,4 Data:T(17,2)/V 6,5 Data:T(17,2)/V 6,6 Data:T(17,2)/V 6,7 Data:T(17,2)/V 6,8 Data:T(17,2)/V 6,9

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 [math]\displaystyle{ t^rq^j }[/math] are shown, along with their alternating sums [math]\displaystyle{ \chi }[/math] (fixed [math]\displaystyle{ j }[/math], alternation over [math]\displaystyle{ r }[/math]). The squares with yellow highlighting are those on the "critical diagonals", where [math]\displaystyle{ j-2r=s+1 }[/math] or [math]\displaystyle{ j-2r=s-1 }[/math], where [math]\displaystyle{ s= }[/math]16 is the signature of T(17,2). Nonzero entries off the critical diagonals (if any exist) are highlighted in red.   
\ r
  \  
j \
 01234567891011121314151617χ
51                 1-1
49                  0
47               11 0
45                  0
43             11   0
41                  0
39           11     0
37                  0
35         11       0
33                  0
31       11         0
29                  0
27     11           0
25                  0
23   11             0
21                  0
19  1               1
171                 1
151                 1
Integral Khovanov Homology

(db, data source)

  
[math]\displaystyle{ \dim{\mathcal G}_{2r+i}\operatorname{KH}^r_{\mathbb Z} }[/math] [math]\displaystyle{ i=15 }[/math] [math]\displaystyle{ i=17 }[/math]
[math]\displaystyle{ r=0 }[/math] [math]\displaystyle{ {\mathbb Z} }[/math] [math]\displaystyle{ {\mathbb Z} }[/math]
[math]\displaystyle{ r=1 }[/math]
[math]\displaystyle{ r=2 }[/math] [math]\displaystyle{ {\mathbb Z} }[/math]
[math]\displaystyle{ r=3 }[/math] [math]\displaystyle{ {\mathbb Z}_2 }[/math] [math]\displaystyle{ {\mathbb Z} }[/math]
[math]\displaystyle{ r=4 }[/math] [math]\displaystyle{ {\mathbb Z} }[/math]
[math]\displaystyle{ r=5 }[/math] [math]\displaystyle{ {\mathbb Z}_2 }[/math] [math]\displaystyle{ {\mathbb Z} }[/math]
[math]\displaystyle{ r=6 }[/math] [math]\displaystyle{ {\mathbb Z} }[/math]
[math]\displaystyle{ r=7 }[/math] [math]\displaystyle{ {\mathbb Z}_2 }[/math] [math]\displaystyle{ {\mathbb Z} }[/math]
[math]\displaystyle{ r=8 }[/math] [math]\displaystyle{ {\mathbb Z} }[/math]
[math]\displaystyle{ r=9 }[/math] [math]\displaystyle{ {\mathbb Z}_2 }[/math] [math]\displaystyle{ {\mathbb Z} }[/math]
[math]\displaystyle{ r=10 }[/math] [math]\displaystyle{ {\mathbb Z} }[/math]
[math]\displaystyle{ r=11 }[/math] [math]\displaystyle{ {\mathbb Z}_2 }[/math] [math]\displaystyle{ {\mathbb Z} }[/math]
[math]\displaystyle{ r=12 }[/math] [math]\displaystyle{ {\mathbb Z} }[/math]
[math]\displaystyle{ r=13 }[/math] [math]\displaystyle{ {\mathbb Z}_2 }[/math] [math]\displaystyle{ {\mathbb Z} }[/math]
[math]\displaystyle{ r=14 }[/math] [math]\displaystyle{ {\mathbb Z} }[/math]
[math]\displaystyle{ r=15 }[/math] [math]\displaystyle{ {\mathbb Z}_2 }[/math] [math]\displaystyle{ {\mathbb Z} }[/math]
[math]\displaystyle{ r=16 }[/math] [math]\displaystyle{ {\mathbb Z} }[/math]
[math]\displaystyle{ r=17 }[/math] [math]\displaystyle{ {\mathbb Z}_2 }[/math] [math]\displaystyle{ {\mathbb Z} }[/math]

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 Torus Knot Page master template (intermediate).

See/edit the Torus Knot_Splice_Base (expert).

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T(8,3).jpg

T(8,3)

T(19,2).jpg

T(19,2)

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