9 9: Difference between revisions

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{{Rolfsen Knot Page Header|n=9|k=9|KnotilusURL=http://srankin.math.uwo.ca/cgi-bin/retrieve.cgi/-1,8,-2,9,-7,1,-3,5,-4,6,-8,2,-9,7,-6,3,-5,4/goTop.html}}
{| align=left
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|[[Image:{{PAGENAME}}.gif]]
|{{Rolfsen Knot Site Links|n=9|k=9|KnotilusURL=http://srankin.math.uwo.ca/cgi-bin/retrieve.cgi/-1,8,-2,9,-7,1,-3,5,-4,6,-8,2,-9,7,-6,3,-5,4/goTop.html}}
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{{Vassiliev Invariants}}
{{Vassiliev Invariants}}


===[[Khovanov Homology]]===
{{Khovanov Homology|table=<table border=1>

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>.

<center><table border=1>
<tr align=center>
<tr align=center>
<td width=14.2857%><table cellpadding=0 cellspacing=0>
<td width=14.2857%><table cellpadding=0 cellspacing=0>
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<tr align=center><td>-23</td><td bgcolor=yellow>&nbsp;</td><td bgcolor=yellow>1</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>1</td></tr>
<tr align=center><td>-23</td><td bgcolor=yellow>&nbsp;</td><td bgcolor=yellow>1</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>1</td></tr>
<tr align=center><td>-25</td><td bgcolor=yellow>1</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>-1</td></tr>
<tr align=center><td>-25</td><td bgcolor=yellow>1</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>-1</td></tr>
</table></center>
</table>}}

{{Computer Talk Header}}
{{Computer Talk Header}}


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q t q t q t</nowiki></pre></td></tr>
q t q t q t</nowiki></pre></td></tr>
</table>
</table>

[[Category:Knot Page]]

Revision as of 20:16, 28 August 2005

9 8.gif

9_8

9 10.gif

9_10

9 9.gif Visit 9 9's page at the Knot Server (KnotPlot driven, includes 3D interactive images!)

Visit 9 9's page at Knotilus!

Visit 9 9's page at the original Knot Atlas!

9 9 Quick Notes


9 9 Further Notes and Views

Knot presentations

Planar diagram presentation X1627 X3,12,4,13 X7,16,8,17 X9,18,10,1 X17,8,18,9 X15,10,16,11 X5,14,6,15 X11,2,12,3 X13,4,14,5
Gauss code -1, 8, -2, 9, -7, 1, -3, 5, -4, 6, -8, 2, -9, 7, -6, 3, -5, 4
Dowker-Thistlethwaite code 6 12 14 16 18 2 4 10 8
Conway Notation [423]

Three dimensional invariants

Symmetry type Reversible
Unknotting number 3
3-genus 3
Bridge index 2
Super bridge index [math]\displaystyle{ \{4,6\} }[/math]
Nakanishi index 1
Maximal Thurston-Bennequin number [-16][5]
Hyperbolic Volume 8.01682
A-Polynomial See Data:9 9/A-polynomial

[edit Notes for 9 9's three dimensional invariants]

Four dimensional invariants

Smooth 4 genus [math]\displaystyle{ 3 }[/math]
Topological 4 genus [math]\displaystyle{ 3 }[/math]
Concordance genus [math]\displaystyle{ 3 }[/math]
Rasmussen s-Invariant -6

[edit Notes for 9 9's four dimensional invariants]

Polynomial invariants

Alexander polynomial [math]\displaystyle{ 2 t^3-4 t^2+6 t-7+6 t^{-1} -4 t^{-2} +2 t^{-3} }[/math]
Conway polynomial [math]\displaystyle{ 2 z^6+8 z^4+8 z^2+1 }[/math]
2nd Alexander ideal (db, data sources) [math]\displaystyle{ \{1\} }[/math]
Determinant and Signature { 31, -6 }
Jones polynomial [math]\displaystyle{ q^{-3} - q^{-4} +3 q^{-5} -4 q^{-6} +5 q^{-7} -5 q^{-8} +5 q^{-9} -4 q^{-10} +2 q^{-11} - q^{-12} }[/math]
HOMFLY-PT polynomial (db, data sources) [math]\displaystyle{ -z^4 a^{10}-3 z^2 a^{10}-2 a^{10}+z^6 a^8+4 z^4 a^8+4 z^2 a^8+a^8+z^6 a^6+5 z^4 a^6+7 z^2 a^6+2 a^6 }[/math]
Kauffman polynomial (db, data sources) [math]\displaystyle{ z^3 a^{15}-z a^{15}+2 z^4 a^{14}-z^2 a^{14}+3 z^5 a^{13}-3 z^3 a^{13}+2 z a^{13}+3 z^6 a^{12}-4 z^4 a^{12}+3 z^2 a^{12}+2 z^7 a^{11}-2 z^5 a^{11}+z^8 a^{10}-z^6 a^{10}+2 z^4 a^{10}-6 z^2 a^{10}+2 a^{10}+3 z^7 a^9-8 z^5 a^9+5 z^3 a^9-2 z a^9+z^8 a^8-3 z^6 a^8+3 z^4 a^8-3 z^2 a^8+a^8+z^7 a^7-3 z^5 a^7+z^3 a^7+z a^7+z^6 a^6-5 z^4 a^6+7 z^2 a^6-2 a^6 }[/math]
The A2 invariant [math]\displaystyle{ -q^{36}-q^{32}-q^{30}-q^{26}+2 q^{24}+q^{20}+q^{18}+2 q^{14}+q^{10} }[/math]
The G2 invariant [math]\displaystyle{ q^{196}-q^{194}+2 q^{192}-2 q^{190}+q^{188}-2 q^{184}+5 q^{182}-6 q^{180}+6 q^{178}-6 q^{176}+2 q^{174}+3 q^{172}-7 q^{170}+12 q^{168}-11 q^{166}+9 q^{164}-5 q^{162}-2 q^{160}+6 q^{158}-11 q^{156}+11 q^{154}-7 q^{152}+3 q^{148}-7 q^{146}+5 q^{144}-q^{142}-8 q^{140}+9 q^{138}-12 q^{136}+5 q^{134}+5 q^{132}-15 q^{130}+20 q^{128}-18 q^{126}+10 q^{124}+q^{122}-12 q^{120}+18 q^{118}-18 q^{116}+14 q^{114}-4 q^{112}-4 q^{110}+11 q^{108}-10 q^{106}+7 q^{104}-2 q^{102}-5 q^{100}+8 q^{98}-8 q^{96}+2 q^{94}+6 q^{92}-11 q^{90}+16 q^{88}-11 q^{86}+q^{84}+7 q^{82}-11 q^{80}+16 q^{78}-12 q^{76}+6 q^{74}+2 q^{72}-5 q^{70}+10 q^{68}-7 q^{66}+5 q^{64}+2 q^{58}-2 q^{56}+2 q^{54}+q^{50} }[/math]

Vassiliev invariants

V2 and V3: (8, -22)
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
[math]\displaystyle{ 32 }[/math] [math]\displaystyle{ -176 }[/math] [math]\displaystyle{ 512 }[/math] [math]\displaystyle{ \frac{3760}{3} }[/math] [math]\displaystyle{ \frac{560}{3} }[/math] [math]\displaystyle{ -5632 }[/math] [math]\displaystyle{ -\frac{29696}{3} }[/math] [math]\displaystyle{ -\frac{5216}{3} }[/math] [math]\displaystyle{ -1264 }[/math] [math]\displaystyle{ \frac{16384}{3} }[/math] [math]\displaystyle{ 15488 }[/math] [math]\displaystyle{ \frac{120320}{3} }[/math] [math]\displaystyle{ \frac{17920}{3} }[/math] [math]\displaystyle{ \frac{1196284}{15} }[/math] [math]\displaystyle{ \frac{40544}{15} }[/math] [math]\displaystyle{ \frac{1354096}{45} }[/math] [math]\displaystyle{ \frac{4628}{9} }[/math] [math]\displaystyle{ \frac{57964}{15} }[/math]

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]-6 is the signature of 9 9. Nonzero entries off the critical diagonals (if any exist) are highlighted in red.   
\ r
  \  
j \
-9-8-7-6-5-4-3-2-10χ
-5         11
-7        110
-9       2  2
-11      21  -1
-13     32   1
-15    22    0
-17   33     0
-19  12      1
-21 13       -2
-23 1        1
-251         -1
Integral Khovanov Homology

(db, data source)

  
[math]\displaystyle{ \dim{\mathcal G}_{2r+i}\operatorname{KH}^r_{\mathbb Z} }[/math] [math]\displaystyle{ i=-7 }[/math] [math]\displaystyle{ i=-5 }[/math]
[math]\displaystyle{ r=-9 }[/math] [math]\displaystyle{ {\mathbb Z} }[/math]
[math]\displaystyle{ r=-8 }[/math] [math]\displaystyle{ {\mathbb Z}\oplus{\mathbb Z}_2 }[/math] [math]\displaystyle{ {\mathbb Z} }[/math]
[math]\displaystyle{ r=-7 }[/math] [math]\displaystyle{ {\mathbb Z}^{3}\oplus{\mathbb Z}_2 }[/math] [math]\displaystyle{ {\mathbb Z} }[/math]
[math]\displaystyle{ r=-6 }[/math] [math]\displaystyle{ {\mathbb Z}^{2}\oplus{\mathbb Z}_2^{3} }[/math] [math]\displaystyle{ {\mathbb Z}^{3} }[/math]
[math]\displaystyle{ r=-5 }[/math] [math]\displaystyle{ {\mathbb Z}^{3}\oplus{\mathbb Z}_2^{2} }[/math] [math]\displaystyle{ {\mathbb Z}^{2} }[/math]
[math]\displaystyle{ r=-4 }[/math] [math]\displaystyle{ {\mathbb Z}^{2}\oplus{\mathbb Z}_2^{3} }[/math] [math]\displaystyle{ {\mathbb Z}^{3} }[/math]
[math]\displaystyle{ r=-3 }[/math] [math]\displaystyle{ {\mathbb Z}^{2}\oplus{\mathbb Z}_2^{2} }[/math] [math]\displaystyle{ {\mathbb Z}^{2} }[/math]
[math]\displaystyle{ r=-2 }[/math] [math]\displaystyle{ {\mathbb Z}\oplus{\mathbb Z}_2^{2} }[/math] [math]\displaystyle{ {\mathbb Z}^{2} }[/math]
[math]\displaystyle{ r=-1 }[/math] [math]\displaystyle{ {\mathbb Z}_2 }[/math] [math]\displaystyle{ {\mathbb Z} }[/math]
[math]\displaystyle{ r=0 }[/math] [math]\displaystyle{ {\mathbb Z} }[/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.

[math]\displaystyle{ \textrm{Include}(\textrm{ColouredJonesM.mhtml}) }[/math]

In[1]:=    
<< KnotTheory`
Loading KnotTheory` (version of August 17, 2005, 14:44:34)...
In[2]:=
Crossings[Knot[9, 9]]
Out[2]=  
9
In[3]:=
PD[Knot[9, 9]]
Out[3]=  
PD[X[1, 6, 2, 7], X[3, 12, 4, 13], X[7, 16, 8, 17], X[9, 18, 10, 1], 
 X[17, 8, 18, 9], X[15, 10, 16, 11], X[5, 14, 6, 15], X[11, 2, 12, 3], 

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

-7 + -- - -- + - + 6 t - 4 t + 2 t

     3    2   t
t t
In[7]:=
Conway[Knot[9, 9]][z]
Out[7]=  
       2      4      6
1 + 8 z  + 8 z  + 2 z
In[8]:=
Select[AllKnots[], (alex === Alexander[#][t])&]
Out[8]=  
{Knot[9, 9]}
In[9]:=
{KnotDet[Knot[9, 9]], KnotSignature[Knot[9, 9]]}
Out[9]=  
{31, -6}
In[10]:=
J=Jones[Knot[9, 9]][q]
Out[10]=  
  -12    2     4    5    5    5    4    3     -4    -3

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

        11    10    9    8    7    6    5
q q q q q q q
In[11]:=
Select[AllKnots[], (J === Jones[#][q] || (J /. q-> 1/q) === Jones[#][q])&]
Out[11]=  
{Knot[9, 9]}
In[12]:=
A2Invariant[Knot[9, 9]][q]
Out[12]=  
  -36    -32    -30    -26    2     -20    -18    2     -10

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

                             24                  14
q q
In[13]:=
Kauffman[Knot[9, 9]][a, z]
Out[13]=  
    6    8      10    7        9        13      15        6  2

-2 a + a + 2 a + a z - 2 a z + 2 a z - a z + 7 a z -

    8  2      10  2      12  2    14  2    7  3      9  3      13  3
 3 a  z  - 6 a   z  + 3 a   z  - a   z  + a  z  + 5 a  z  - 3 a   z  + 

  15  3      6  4      8  4      10  4      12  4      14  4
 a   z  - 5 a  z  + 3 a  z  + 2 a   z  - 4 a   z  + 2 a   z  - 

    7  5      9  5      11  5      13  5    6  6      8  6    10  6
 3 a  z  - 8 a  z  - 2 a   z  + 3 a   z  + a  z  - 3 a  z  - a   z  + 

    12  6    7  7      9  7      11  7    8  8    10  8
3 a z + a z + 3 a z + 2 a z + a z + a z
In[14]:=
{Vassiliev[2][Knot[9, 9]], Vassiliev[3][Knot[9, 9]]}
Out[14]=  
{0, -22}
In[15]:=
Kh[Knot[9, 9]][q, t]
Out[15]=  
 -7    -5     1        1        1        3        1        2

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

            25  9    23  8    21  8    21  7    19  7    19  6
           q   t    q   t    q   t    q   t    q   t    q   t

   3        3        2        2        3        2        2
 ------ + ------ + ------ + ------ + ------ + ------ + ------ + 
  17  6    17  5    15  5    15  4    13  4    13  3    11  3
 q   t    q   t    q   t    q   t    q   t    q   t    q   t

   1        2      1
 ------ + ----- + ----
  11  2    9  2    7
q t q t q t