T(29,2)

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[[Image:T(14,3).{{{ext}}}|80px|link=T(14,3)]]

T(14,3)

[[Image:T(31,2).{{{ext}}}|80px|link=T(31,2)]]

T(31,2)

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Knot presentations

Planar diagram presentation X19,49,20,48 X49,21,50,20 X21,51,22,50 X51,23,52,22 X23,53,24,52 X53,25,54,24 X25,55,26,54 X55,27,56,26 X27,57,28,56 X57,29,58,28 X29,1,30,58 X1,31,2,30 X31,3,32,2 X3,33,4,32 X33,5,34,4 X5,35,6,34 X35,7,36,6 X7,37,8,36 X37,9,38,8 X9,39,10,38 X39,11,40,10 X11,41,12,40 X41,13,42,12 X13,43,14,42 X43,15,44,14 X15,45,16,44 X45,17,46,16 X17,47,18,46 X47,19,48,18
Gauss code {-12, 13, -14, 15, -16, 17, -18, 19, -20, 21, -22, 23, -24, 25, -26, 27, -28, 29, -1, 2, -3, 4, -5, 6, -7, 8, -9, 10, -11, 12, -13, 14, -15, 16, -17, 18, -19, 20, -21, 22, -23, 24, -25, 26, -27, 28, -29, 1, -2, 3, -4, 5, -6, 7, -8, 9, -10, 11}
Dowker-Thistlethwaite code 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 2 4 6 8 10 12 14 16 18 20 22 24 26 28

Polynomial invariants

Polynomial invariants

Alexander polynomial
Conway polynomial
2nd Alexander ideal (db, data sources)
Determinant and Signature { 29, 28 }
Jones polynomial
HOMFLY-PT polynomial (db, data sources)
Kauffman polynomial (db, data sources)
The A2 invariant Data:T(29,2)/QuantumInvariant/A2/1,0
The G2 invariant Data:T(29,2)/QuantumInvariant/G2/1,0

Vassiliev invariants

V2 and V3 {0, 1015})

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 28 is the signature of T(29,2). Nonzero entries off the critical diagonals (if any exist) are highlighted in red.

\ r
  \  
j \
01234567891011121314151617181920212223242526272829χ
87                             1-1
85                              0
83                           11 0
81                              0
79                         11   0
77                              0
75                       11     0
73                              0
71                     11       0
69                              0
67                   11         0
65                              0
63                 11           0
61                              0
59               11             0
57                              0
55             11               0
53                              0
51           11                 0
49                              0
47         11                   0
45                              0
43       11                     0
41                              0
39     11                       0
37                              0
35   11                         0
33                              0
31  1                           1
291                             1
271                             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 19, 2005, 13:11:25)...
In[2]:=
Crossings[TorusKnot[29, 2]]
Out[2]=   
29
In[3]:=
PD[TorusKnot[29, 2]]
Out[3]=   
PD[X[19, 49, 20, 48], X[49, 21, 50, 20], X[21, 51, 22, 50], 
 X[51, 23, 52, 22], X[23, 53, 24, 52], X[53, 25, 54, 24], 

 X[25, 55, 26, 54], X[55, 27, 56, 26], X[27, 57, 28, 56], 

 X[57, 29, 58, 28], X[29, 1, 30, 58], X[1, 31, 2, 30], 

 X[31, 3, 32, 2], X[3, 33, 4, 32], X[33, 5, 34, 4], X[5, 35, 6, 34], 

 X[35, 7, 36, 6], X[7, 37, 8, 36], X[37, 9, 38, 8], X[9, 39, 10, 38], 

 X[39, 11, 40, 10], X[11, 41, 12, 40], X[41, 13, 42, 12], 

 X[13, 43, 14, 42], X[43, 15, 44, 14], X[15, 45, 16, 44], 

X[45, 17, 46, 16], X[17, 47, 18, 46], X[47, 19, 48, 18]]
In[4]:=
GaussCode[TorusKnot[29, 2]]
Out[4]=   
GaussCode[-12, 13, -14, 15, -16, 17, -18, 19, -20, 21, -22, 23, -24, 
 25, -26, 27, -28, 29, -1, 2, -3, 4, -5, 6, -7, 8, -9, 10, -11, 12, 

 -13, 14, -15, 16, -17, 18, -19, 20, -21, 22, -23, 24, -25, 26, -27, 

28, -29, 1, -2, 3, -4, 5, -6, 7, -8, 9, -10, 11]
In[5]:=
BR[TorusKnot[29, 2]]
Out[5]=   
BR[2, {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 
   1, 1, 1, 1, 1, 1, 1, 1}]
In[6]:=
alex = Alexander[TorusKnot[29, 2]][t]
Out[6]=   
     -14    -13    -12    -11    -10    -9    -8    -7    -6    -5

1 + t - t + t - t + t - t + t - t + t - t +

  -4    -3    -2   1        2    3    4    5    6    7    8    9
 t   - t   + t   - - - t + t  - t  + t  - t  + t  - t  + t  - t  + 
                   t

  10    11    12    13    14
t - t + t - t + t
In[7]:=
Conway[TorusKnot[29, 2]][z]
Out[7]=   
         2         4          6          8          10           12

1 + 105 z + 1820 z + 12376 z + 43758 z + 92378 z + 125970 z +

         14          16          18          20         22        24
 116280 z   + 74613 z   + 33649 z   + 10626 z   + 2300 z   + 325 z   + 

     26    28
27 z + z
In[8]:=
Select[AllKnots[], (alex === Alexander[#][t])&]
Out[8]=   
{}
In[9]:=
{KnotDet[TorusKnot[29, 2]], KnotSignature[TorusKnot[29, 2]]}
Out[9]=   
{29, 28}
In[10]:=
J=Jones[TorusKnot[29, 2]][q]
Out[10]=   
 14    16    17    18    19    20    21    22    23    24    25    26

q + q - q + q - q + q - q + q - q + q - q + q -

  27    28    29    30    31    32    33    34    35    36    37
 q   + q   - q   + q   - q   + q   - q   + q   - q   + q   - q   + 

  38    39    40    41    42    43
q - q + q - q + q - q
In[11]:=
Select[AllKnots[], (J === Jones[#][q] || (J /. q-> 1/q) === Jones[#][q])&]
Out[11]=   
{}
In[12]:=
A2Invariant[TorusKnot[29, 2]][q]
Out[12]=   
NotAvailable
In[13]:=
Kauffman[TorusKnot[29, 2]][a, z]
Out[13]=   
NotAvailable
In[14]:=
{Vassiliev[2][TorusKnot[29, 2]], Vassiliev[3][TorusKnot[29, 2]]}
Out[14]=   
{0, 1015}
In[15]:=
Kh[TorusKnot[29, 2]][q, t]
Out[15]=   
 27    29    31  2    35  3    35  4    39  5    39  6    43  7

q + q + q t + q t + q t + q t + q t + q t +

  43  8    47  9    47  10    51  11    51  12    55  13    55  14
 q   t  + q   t  + q   t   + q   t   + q   t   + q   t   + q   t   + 

  59  15    59  16    63  17    63  18    67  19    67  20    71  21
 q   t   + q   t   + q   t   + q   t   + q   t   + q   t   + q   t   + 

  71  22    75  23    75  24    79  25    79  26    83  27    83  28
 q   t   + q   t   + q   t   + q   t   + q   t   + q   t   + q   t   + 

  87  29
q t