10 115

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10 114.gif

10_114

10 116.gif

10_116

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10 115 Quick Notes


10 115 Further Notes and Views

Knot presentations

Planar diagram presentation X6271 X14,6,15,5 X20,15,1,16 X16,7,17,8 X8,19,9,20 X18,11,19,12 X10,4,11,3 X4,10,5,9 X12,17,13,18 X2,14,3,13
Gauss code 1, -10, 7, -8, 2, -1, 4, -5, 8, -7, 6, -9, 10, -2, 3, -4, 9, -6, 5, -3
Dowker-Thistlethwaite code 6 10 14 16 4 18 2 20 12 8
Conway Notation [8*20.20]

Three dimensional invariants

Symmetry type Negative amphicheiral
Unknotting number 2
3-genus 3
Bridge index 3
Super bridge index Missing
Nakanishi index 1
Maximal Thurston-Bennequin number [-6][-6]
Hyperbolic Volume 16.638
A-Polynomial See Data:10 115/A-polynomial

[edit Notes for 10 115's three dimensional invariants]

Four dimensional invariants

Smooth 4 genus
Topological 4 genus
Concordance genus
Rasmussen s-Invariant 0

[edit Notes for 10 115's four dimensional invariants]

Polynomial invariants

Alexander polynomial
Conway polynomial
2nd Alexander ideal (db, data sources)
Determinant and Signature { 109, 0 }
Jones polynomial
HOMFLY-PT polynomial (db, data sources)
Kauffman polynomial (db, data sources)
The A2 invariant
The G2 invariant

Vassiliev invariants

V2 and V3: (1, 0)
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

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 0 is the signature of 10 115. Nonzero entries off the critical diagonals (if any exist) are highlighted in red.

\ r
  \  
j \
-5-4-3-2-1012345χ
11          1-1
9         3 3
7        61 -5
5       83  5
3      96   -3
1     108    2
-1    810     2
-3   69      -3
-5  38       5
-7 16        -5
-9 3         3
-111          -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 17, 2005, 14:44:34)...
In[2]:=
Crossings[Knot[10, 115]]
Out[2]=  
10
In[3]:=
PD[Knot[10, 115]]
Out[3]=  
PD[X[6, 2, 7, 1], X[14, 6, 15, 5], X[20, 15, 1, 16], X[16, 7, 17, 8], 
 X[8, 19, 9, 20], X[18, 11, 19, 12], X[10, 4, 11, 3], X[4, 10, 5, 9], 

X[12, 17, 13, 18], X[2, 14, 3, 13]]
In[4]:=
GaussCode[Knot[10, 115]]
Out[4]=  
GaussCode[1, -10, 7, -8, 2, -1, 4, -5, 8, -7, 6, -9, 10, -2, 3, -4, 9, 
  -6, 5, -3]
In[5]:=
BR[Knot[10, 115]]
Out[5]=  
BR[5, {1, -2, 1, 3, 2, 2, -4, -3, 2, -3, -3, -4}]
In[6]:=
alex = Alexander[Knot[10, 115]][t]
Out[6]=  
      -3   9    26             2    3

37 - t + -- - -- - 26 t + 9 t - t

           2   t
t
In[7]:=
Conway[Knot[10, 115]][z]
Out[7]=  
     2      4    6
1 + z  + 3 z  - z
In[8]:=
Select[AllKnots[], (alex === Alexander[#][t])&]
Out[8]=  
{Knot[10, 115]}
In[9]:=
{KnotDet[Knot[10, 115]], KnotSignature[Knot[10, 115]]}
Out[9]=  
{109, 0}
In[10]:=
J=Jones[Knot[10, 115]][q]
Out[10]=  
      -5   4    9    14   17              2      3      4    5

19 - q + -- - -- + -- - -- - 17 q + 14 q - 9 q + 4 q - q

           4    3    2   q
q q q
In[11]:=
Select[AllKnots[], (J === Jones[#][q] || (J /. q-> 1/q) === Jones[#][q])&]
Out[11]=  
{Knot[10, 115]}
In[12]:=
A2Invariant[Knot[10, 115]][q]
Out[12]=  
      -16    -14    2     4    2     -6   2    5       2      4    6

-1 - q + q + --- - --- + -- - q - -- + -- + 5 q - 2 q - q +

                   12    10    8          4    2
                  q     q     q          q    q

    8      10      12    14    16
2 q - 4 q + 2 q + q - q
In[13]:=
Kauffman[Knot[10, 115]][a, z]
Out[13]=  
                                                      2    2
    -2    2   2 z   5 z              3        2   2 z    z     2  2

3 + a + a - --- - --- - 5 a z - 2 a z - 6 z + ---- - -- - a z +

               3     a                              4     2
              a                                    a     a

            3      3       3
    4  2   z    8 z    22 z          3      3  3    5  3       4
 2 a  z  - -- + ---- + ----- + 22 a z  + 8 a  z  - a  z  + 12 z  - 
            5     3      a
           a     a

    4    4                      5       5       5
 5 z    z     2  4      4  4   z    13 z    34 z          5
 ---- + -- + a  z  - 5 a  z  + -- - ----- - ----- - 34 a z  - 
   4     2                      5     3       a
  a     a                      a     a

                               6      6                          7
     3  5    5  5       6   4 z    9 z       2  6      4  6   8 z
 13 a  z  + a  z  - 26 z  + ---- - ---- - 9 a  z  + 4 a  z  + ---- + 
                              4      2                          3
                             a      a                          a

     7                                  8                9
 13 z          7      3  7       8   8 z       2  8   3 z         9
 ----- + 13 a z  + 8 a  z  + 16 z  + ---- + 8 a  z  + ---- + 3 a z
   a                                   2               a
a
In[14]:=
{Vassiliev[2][Knot[10, 115]], Vassiliev[3][Knot[10, 115]]}
Out[14]=  
{0, 0}
In[15]:=
Kh[Knot[10, 115]][q, t]
Out[15]=  
10            1        3       1       6       3       8       6

-- + 10 q + ------ + ----- + ----- + ----- + ----- + ----- + ----- + q 11 5 9 4 7 4 7 3 5 3 5 2 3 2

           q   t    q  t    q  t    q  t    q  t    q  t    q  t

  9      8               3        3  2      5  2      5  3      7  3
 ---- + --- + 8 q t + 9 q  t + 6 q  t  + 8 q  t  + 3 q  t  + 6 q  t  + 
  3     q t
 q  t

  7  4      9  4    11  5
q t + 3 q t + q t