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L11a7

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Acknowledgement

L11a7 as Morse Link
DrawMorseLink

PD Presentation: X6172 X16,7,17,8 X4,17,1,18 X12,6,13,5 X8493 X22,14,5,13 X14,22,15,21 X18,10,19,9 X20,12,21,11 X10,20,11,19 X2,16,3,15

Gauss Code: {{1, -11, 5, -3}, {4, -1, 2, -5, 8, -10, 9, -4, 6, -7, 11, -2, 3, -8, 10, -9, 7, -6}}

Jones Polynomial: q-3/2 - 4q-1/2 + 7q1/2 - 12q3/2 + 14q5/2 - 17q7/2 + 16q9/2 - 14q11/2 + 10q13/2 - 5q15/2 + 3q17/2 - q19/2

A2 (sl(3)) Invariant: - q-4 + 2q-2 + q2 + 3q4 - q6 + 6q8 + q10 + 3q12 + 2q14 - 3q16 + q18 - 4q20 - q22 - q26 + q28

HOMFLY-PT Polynomial: a-7z-1 - a-7z - 3a-7z3 - a-7z5 - 2a-5z-1 + a-5z + 5a-5z3 + 4a-5z5 + a-5z7 - a-3z + a-3z3 + 3a-3z5 + a-3z7 + a-1z-1 + a-1z - 2a-1z3 - a-1z5

Kauffman Polynomial: 2a-11z3 - a-11z5 - 4a-10z2 + 7a-10z4 - 3a-10z6 - 3a-9z3 + 7a-9z5 - 4a-9z7 + 2a-8 - 7a-8z2 + 3a-8z4 + 4a-8z6 - 4a-8z8 - a-7z-1 - 2a-7z + 9a-7z3 - 13a-7z5 + 8a-7z7 - 4a-7z9 + 5a-6 - 6a-6z2 - a-6z4 + 2a-6z6 - 2a-6z10 - 2a-5z-1 - 3a-5z + 24a-5z3 - 38a-5z5 + 27a-5z7 - 9a-5z9 + 3a-4 - 2a-4z2 - 8a-4z4 + 12a-4z6 - 2a-4z8 - 2a-4z10 - 2a-3z + 4a-3z3 - 6a-3z5 + 11a-3z7 - 5a-3z9 - a-2 + a-2z2 - 9a-2z4 + 16a-2z6 - 6a-2z8 + a-1z-1 - a-1z - 6a-1z3 + 11a-1z5 - 4a-1z7 + 2z4 - z6

Khovanov Homology:
trqj r = -3r = -2r = -1r = 0r = 1r = 2r = 3r = 4r = 5r = 6r = 7r = 8
j = 20           1
j = 18          2 
j = 16         31 
j = 14        72  
j = 12       73   
j = 10      97    
j = 8     87     
j = 6    69      
j = 4   68       
j = 2  38        
j = 0 14         
j = -2 3          
j = -41           


Computer Talk. The data above can be recomputed by Mathematica using the package KnotTheory`. Following setup, the sample Mathematica session below reproduces most of the above data (Mathematica system prompts in blue, human input in red, Mathematica output in black):

In[1]:=    
<< KnotTheory`
Loading KnotTheory` (version of August 30, 2005, 10:15:35)...
In[2]:=
Length[Skeleton[L]]
Out[2]=   
2
In[3]:=
Show[DrawMorseLink[Link[11, Alternating, 7]]]
Out[3]=   
 -Graphics- 
In[4]:=
PD[L = Link[11, Alternating, 7]]
Out[4]=   
PD[X[6, 1, 7, 2], X[16, 7, 17, 8], X[4, 17, 1, 18], X[12, 6, 13, 5], 
 
>   X[8, 4, 9, 3], X[22, 14, 5, 13], X[14, 22, 15, 21], X[18, 10, 19, 9], 
 
>   X[20, 12, 21, 11], X[10, 20, 11, 19], X[2, 16, 3, 15]]
In[5]:=
GaussCode[L]
Out[5]=   
GaussCode[{1, -11, 5, -3}, {4, -1, 2, -5, 8, -10, 9, -4, 6, -7, 11, -2, 3, -8, 
 
>    10, -9, 7, -6}]
In[6]:=
Jones[L][q]
Out[6]=   
 -(3/2)      4                      3/2       5/2       7/2       9/2
q       - ------- + 7 Sqrt[q] - 12 q    + 14 q    - 17 q    + 16 q    - 
          Sqrt[q]
 
        11/2       13/2      15/2      17/2    19/2
>   14 q     + 10 q     - 5 q     + 3 q     - q
In[7]:=
A2Invariant[L][q]
Out[7]=   
  -4   2     2      4    6      8    10      12      14      16    18      20
-q   + -- + q  + 3 q  - q  + 6 q  + q   + 3 q   + 2 q   - 3 q   + q   - 4 q   - 
        2
       q
 
     22    26    28
>   q   - q   + q
In[8]:=
HOMFLYPT[Link[11, Alternating, 7]][a, z]
Out[8]=   
                                          3      3    3      3    5      5
 1      2      1    z    z    z    z   3 z    5 z    z    2 z    z    4 z
---- - ---- + --- - -- + -- - -- + - - ---- + ---- + -- - ---- - -- + ---- + 
 7      5     a z    7    5    3   a     7      5     3    a      7     5
a  z   a  z         a    a    a         a      a     a           a     a
 
       5    5    7    7
    3 z    z    z    z
>   ---- - -- + -- + --
      3    a     5    3
     a          a    a
In[9]:=
Kauffman[Link[11, Alternating, 7]][a, z]
Out[9]=   
                                                                  2      2
2    5    3     -2    1      2      1    2 z   3 z   2 z   z   4 z    7 z
-- + -- + -- - a   - ---- - ---- + --- - --- - --- - --- - - - ---- - ---- - 
 8    6    4          7      5     a z    7     5     3    a    10      8
a    a    a          a  z   a  z         a     a     a         a       a
 
       2      2    2      3      3      3       3      3      3             4
    6 z    2 z    z    2 z    3 z    9 z    24 z    4 z    6 z       4   7 z
>   ---- - ---- + -- + ---- - ---- + ---- + ----- + ---- - ---- + 2 z  + ---- + 
      6      4     2    11      9      7      5       3     a             10
     a      a     a    a       a      a      a       a                   a
 
       4    4      4      4    5       5       5       5      5       5
    3 z    z    8 z    9 z    z     7 z    13 z    38 z    6 z    11 z     6
>   ---- - -- - ---- - ---- - --- + ---- - ----- - ----- - ---- + ----- - z  - 
      8     6     4      2     11     9      7       5       3      a
     a     a     a      a     a      a      a       a       a
 
       6      6      6       6       6      7      7       7       7      7
    3 z    4 z    2 z    12 z    16 z    4 z    8 z    27 z    11 z    4 z
>   ---- + ---- + ---- + ----- + ----- - ---- + ---- + ----- + ----- - ---- - 
     10      8      6      4       2       9      7      5       3      a
    a       a      a      a       a       a      a      a       a
 
       8      8      8      9      9      9      10      10
    4 z    2 z    6 z    4 z    9 z    5 z    2 z     2 z
>   ---- - ---- - ---- - ---- - ---- - ---- - ----- - -----
      8      4      2      7      5      3      6       4
     a      a      a      a      a      a      a       a
In[10]:=
Kh[L][q, t]
Out[10]=   
                                           2
   2      4     1      -2     3     4   3 q       4        6        6  2
8 q  + 6 q  + ----- + t   + ----- + - + ---- + 8 q  t + 6 q  t + 9 q  t  + 
               4  3          2  2   t    t
              q  t          q  t
 
       8  2      8  3      10  3      10  4      12  4      12  5      14  5
>   8 q  t  + 7 q  t  + 9 q   t  + 7 q   t  + 7 q   t  + 3 q   t  + 7 q   t  + 
 
       14  6      16  6    16  7      18  7    20  8
>   2 q   t  + 3 q   t  + q   t  + 2 q   t  + q   t


Dror Bar-Natan: The Knot Atlas: The Thistlethwaite Link Table: The Link L11a7
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