9 3: Difference between revisions

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{{Knot Navigation Links|ext=gif}}
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{{Rolfsen Knot Page Header|n=9|k=3|KnotilusURL=http://srankin.math.uwo.ca/cgi-bin/retrieve.cgi/1,-7,2,-8,5,-9,6,-1,3,-4,7,-2,8,-5,9,-6,4,-3/goTop.html}}
{| align=left
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|[[Image:{{PAGENAME}}.gif]]
|{{Rolfsen Knot Site Links|n=9|k=3|KnotilusURL=http://srankin.math.uwo.ca/cgi-bin/retrieve.cgi/1,-7,2,-8,5,-9,6,-1,3,-4,7,-2,8,-5,9,-6,4,-3/goTop.html}}
|{{:{{PAGENAME}} Quick Notes}}
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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>7</td><td bgcolor=yellow>1</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>0</td></tr>
<tr align=center><td>7</td><td bgcolor=yellow>1</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>0</td></tr>
<tr align=center><td>5</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>5</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 + 2 q t + 2 q t + q t + 2 q t + q t + q t</nowiki></pre></td></tr>
q t + 2 q t + 2 q t + q t + 2 q t + q t + q t</nowiki></pre></td></tr>
</table>
</table>

[[Category:Knot Page]]

Revision as of 20:08, 28 August 2005

9 2.gif

9_2

9 4.gif

9_4

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

Visit 9 3's page at Knotilus!

Visit 9 3's page at the original Knot Atlas!

9 3 Quick Notes


9 3 Further Notes and Views

Knot presentations

Planar diagram presentation X8291 X12,4,13,3 X18,10,1,9 X10,18,11,17 X14,6,15,5 X16,8,17,7 X2,12,3,11 X4,14,5,13 X6,16,7,15
Gauss code 1, -7, 2, -8, 5, -9, 6, -1, 3, -4, 7, -2, 8, -5, 9, -6, 4, -3
Dowker-Thistlethwaite code 8 12 14 16 18 2 4 6 10
Conway Notation [63]

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 [5][-16]
Hyperbolic Volume 4.99486
A-Polynomial See Data:9 3/A-polynomial

[edit Notes for 9 3'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 3's four dimensional invariants]

Polynomial invariants

Alexander polynomial [math]\displaystyle{ 2 t^3-3 t^2+3 t-3+3 t^{-1} -3 t^{-2} +2 t^{-3} }[/math]
Conway polynomial [math]\displaystyle{ 2 z^6+9 z^4+9 z^2+1 }[/math]
2nd Alexander ideal (db, data sources) [math]\displaystyle{ \{1\} }[/math]
Determinant and Signature { 19, 6 }
Jones polynomial [math]\displaystyle{ -q^{12}+q^{11}-2 q^{10}+3 q^9-3 q^8+3 q^7-2 q^6+2 q^5-q^4+q^3 }[/math]
HOMFLY-PT polynomial (db, data sources) [math]\displaystyle{ z^6 a^{-6} +z^6 a^{-8} +5 z^4 a^{-6} +5 z^4 a^{-8} -z^4 a^{-10} +6 z^2 a^{-6} +7 z^2 a^{-8} -4 z^2 a^{-10} + a^{-6} +3 a^{-8} -3 a^{-10} }[/math]
Kauffman polynomial (db, data sources) [math]\displaystyle{ z^8 a^{-8} +z^8 a^{-10} +z^7 a^{-7} +2 z^7 a^{-9} +z^7 a^{-11} +z^6 a^{-6} -5 z^6 a^{-8} -5 z^6 a^{-10} +z^6 a^{-12} -4 z^5 a^{-7} -8 z^5 a^{-9} -3 z^5 a^{-11} +z^5 a^{-13} -5 z^4 a^{-6} +9 z^4 a^{-8} +11 z^4 a^{-10} -2 z^4 a^{-12} +z^4 a^{-14} +3 z^3 a^{-7} +9 z^3 a^{-9} +4 z^3 a^{-11} -z^3 a^{-13} +z^3 a^{-15} +6 z^2 a^{-6} -9 z^2 a^{-8} -11 z^2 a^{-10} +3 z^2 a^{-12} -z^2 a^{-14} -4 z a^{-9} -z a^{-11} +z a^{-13} -2 z a^{-15} - a^{-6} +3 a^{-8} +3 a^{-10} }[/math]
The A2 invariant [math]\displaystyle{ q^{-10} + q^{-14} + q^{-18} + q^{-20} + q^{-22} +2 q^{-24} - q^{-30} - q^{-32} - q^{-34} - q^{-36} }[/math]
The G2 invariant [math]\displaystyle{ q^{-50} + q^{-54} - q^{-56} + q^{-58} +3 q^{-64} -2 q^{-66} +3 q^{-68} - q^{-70} + q^{-72} +2 q^{-74} -3 q^{-76} +3 q^{-78} - q^{-80} + q^{-82} + q^{-84} - q^{-86} +2 q^{-88} + q^{-90} +2 q^{-94} - q^{-96} + q^{-98} +2 q^{-100} -2 q^{-102} +3 q^{-104} - q^{-106} +2 q^{-108} - q^{-112} +2 q^{-114} -2 q^{-116} +3 q^{-118} -2 q^{-120} + q^{-124} -2 q^{-126} + q^{-128} - q^{-130} - q^{-132} + q^{-134} - q^{-136} - q^{-138} - q^{-142} - q^{-146} -2 q^{-148} - q^{-152} - q^{-156} - q^{-160} - q^{-162} - q^{-164} - q^{-166} +2 q^{-168} -2 q^{-170} + q^{-172} + q^{-178} - q^{-180} + q^{-182} - q^{-184} + q^{-186} - q^{-190} + q^{-192} + q^{-196} }[/math]

Vassiliev invariants

V2 and V3: (9, 26)
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{ 36 }[/math] [math]\displaystyle{ 208 }[/math] [math]\displaystyle{ 648 }[/math] [math]\displaystyle{ 1578 }[/math] [math]\displaystyle{ 246 }[/math] [math]\displaystyle{ 7488 }[/math] [math]\displaystyle{ \frac{39616}{3} }[/math] [math]\displaystyle{ \frac{7072}{3} }[/math] [math]\displaystyle{ 1744 }[/math] [math]\displaystyle{ 7776 }[/math] [math]\displaystyle{ 21632 }[/math] [math]\displaystyle{ 56808 }[/math] [math]\displaystyle{ 8856 }[/math] [math]\displaystyle{ \frac{1125053}{10} }[/math] [math]\displaystyle{ \frac{16214}{5} }[/math] [math]\displaystyle{ \frac{218942}{5} }[/math] [math]\displaystyle{ \frac{1313}{2} }[/math] [math]\displaystyle{ \frac{57373}{10} }[/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 3. Nonzero entries off the critical diagonals (if any exist) are highlighted in red.   
\ r
  \  
j \
0123456789χ
25         1-1
23          0
21       21 -1
19      1   1
17     22   0
15    11    0
13   12     1
11  11      0
9  1       1
711        0
51         1
Integral Khovanov Homology

(db, data source)

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

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, 3]]
Out[2]=  
9
In[3]:=
PD[Knot[9, 3]]
Out[3]=  
PD[X[8, 2, 9, 1], X[12, 4, 13, 3], X[18, 10, 1, 9], X[10, 18, 11, 17], 
 X[14, 6, 15, 5], X[16, 8, 17, 7], X[2, 12, 3, 11], X[4, 14, 5, 13], 

X[6, 16, 7, 15]]
In[4]:=
GaussCode[Knot[9, 3]]
Out[4]=  
GaussCode[1, -7, 2, -8, 5, -9, 6, -1, 3, -4, 7, -2, 8, -5, 9, -6, 4, -3]
In[5]:=
BR[Knot[9, 3]]
Out[5]=  
BR[3, {1, 1, 1, 1, 1, 1, 1, 2, -1, 2}]
In[6]:=
alex = Alexander[Knot[9, 3]][t]
Out[6]=  
     2    3    3            2      3

-3 + -- - -- + - + 3 t - 3 t + 2 t

     3    2   t
t t
In[7]:=
Conway[Knot[9, 3]][z]
Out[7]=  
       2      4      6
1 + 9 z  + 9 z  + 2 z
In[8]:=
Select[AllKnots[], (alex === Alexander[#][t])&]
Out[8]=  
{Knot[9, 3]}
In[9]:=
{KnotDet[Knot[9, 3]], KnotSignature[Knot[9, 3]]}
Out[9]=  
{19, 6}
In[10]:=
J=Jones[Knot[9, 3]][q]
Out[10]=  
 3    4      5      6      7      8      9      10    11    12
q  - q  + 2 q  - 2 q  + 3 q  - 3 q  + 3 q  - 2 q   + q   - q
In[11]:=
Select[AllKnots[], (J === Jones[#][q] || (J /. q-> 1/q) === Jones[#][q])&]
Out[11]=  
{Knot[9, 3]}
In[12]:=
A2Invariant[Knot[9, 3]][q]
Out[12]=  
 10    14    18    20    22      24    30    32    34    36
q   + q   + q   + q   + q   + 2 q   - q   - q   - q   - q
In[13]:=
Kauffman[Knot[9, 3]][a, z]
Out[13]=  
                                          2       2       2      2
3    3     -6   2 z    z     z    4 z   z     3 z    11 z    9 z

--- + -- - a - --- + --- - --- - --- - --- + ---- - ----- - ---- +

10    8          15    13    11    9     14    12      10      8

a a a a a a a a a a

    2    3     3       3      3      3    4       4       4      4
 6 z    z     z     4 z    9 z    3 z    z     2 z    11 z    9 z
 ---- + --- - --- + ---- + ---- + ---- + --- - ---- + ----- + ---- - 
   6     15    13    11      9      7     14    12      10      8
  a     a     a     a       a      a     a     a       a       a

    4    5       5      5      5    6       6      6    6    7
 5 z    z     3 z    8 z    4 z    z     5 z    5 z    z    z
 ---- + --- - ---- - ---- - ---- + --- - ---- - ---- + -- + --- + 
   6     13    11      9      7     12    10      8     6    11
  a     a     a       a      a     a     a       a     a    a

    7    7    8     8
 2 z    z    z     z
 ---- + -- + --- + --
   9     7    10    8
a a a a
In[14]:=
{Vassiliev[2][Knot[9, 3]], Vassiliev[3][Knot[9, 3]]}
Out[14]=  
{0, 26}
In[15]:=
Kh[Knot[9, 3]][q, t]
Out[15]=  
 5    7    7      9  2    11  2    11  3    13  3      13  4    15  4

q + q + q t + q t + q t + q t + q t + 2 q t + q t +

  15  5      17  5      17  6    19  6      21  7    21  8    25  9
q t + 2 q t + 2 q t + q t + 2 q t + q t + q t