6 2

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6_1

6_3

Contents

Image:6 2.gif
(KnotPlot image)

See the full Rolfsen Knot Table.

Visit 6 2's page at the Knot Server (KnotPlot driven, includes 3D interactive images!)

Visit 6_2's page at Knotilus!

Visit 6 2's page at the original Knot Atlas!

Dror likes to call 6_2 "The Miller Institute Knot", as it is the logo of the Miller Institute for Basic Research.

The Miller Institute Mug [1]
The Miller Institute Mug [1]
Simple square depiction
Simple square depiction
3D depiction
3D depiction

[edit] Knot presentations

Planar diagram presentation X1425 X5,10,6,11 X3948 X9,3,10,2 X7,12,8,1 X11,6,12,7
Gauss code -1, 4, -3, 1, -2, 6, -5, 3, -4, 2, -6, 5
Dowker-Thistlethwaite code 4 8 10 12 2 6
Conway Notation [312]


Minimum Braid Representative A Morse Link Presentation An Arc Presentation
Image:BraidPart3.gifImage:BraidPart3.gifImage:BraidPart3.gifImage:BraidPart0.gifImage:BraidPart3.gifImage:BraidPart0.gif
Image:BraidPart4.gifImage:BraidPart4.gifImage:BraidPart4.gifImage:BraidPart1.gifImage:BraidPart4.gifImage:BraidPart1.gif
Image:BraidPart0.gifImage:BraidPart0.gifImage:BraidPart0.gifImage:BraidPart2.gifImage:BraidPart0.gifImage:BraidPart2.gif

Length is 6, width is 3,

Braid index is 3

Image:6 2_ML.gif Image:6 2_AP.gif
[{8, 2}, {1, 6}, {7, 3}, {2, 4}, {6, 8}, {3, 5}, {4, 7}, {5, 1}]

[edit Notes on presentations of 6 2]

Knot 6_2.
Knot 6_2.
A graph, knot 6_2.
A graph, knot 6_2.

[edit] Three dimensional invariants

Symmetry type Reversible
Unknotting number 1
3-genus 2
Bridge index 2
Super bridge index {3,4}
Nakanishi index 1
Maximal Thurston-Bennequin number [-7][-1]
Hyperbolic Volume 4.40083
A-Polynomial See Data:6 2/A-polynomial

[edit Notes for 6 2's three dimensional invariants]

[edit] Four dimensional invariants

Smooth 4 genus 1
Topological 4 genus 1
Concordance genus 2
Rasmussen s-Invariant -2

[edit Notes for 6 2's four dimensional invariants]

[edit] Polynomial invariants

Alexander polynomial t2 + 3t−3 + 3t−1t−2
Conway polynomial z4z2 + 1
2nd Alexander ideal (db, data sources) {1}
Determinant and Signature { 11, -2 }
Jones polynomial q−1 + 2q−1−2q−2 + 2q−3−2q−4 + q−5
HOMFLY-PT polynomial (db, data sources) z2a4 + a4z4a2−3z2a2−2a2 + z2 + 2
Kauffman polynomial (db, data sources) z2a6 + 2z3a5za5 + 2z4a4−2z2a4 + a4 + z5a3za3 + 3z4a2−6z2a2 + 2a2 + z5a−2z3a + z4−3z2 + 2
The A2 invariant q16q8q4 + q2 + 1 + q−2 + q−4
The G2 invariant q86q84 + q82q80q78q74 + 3q72−2q70 + q68 + 2q62q60 + q58 + q56 + q52 + 3q46−3q44 + q42q40q38 + 2q36−4q34 + q32−2q30−3q24 + q22q20q14 + q12 + q10 + 2q6q4 + 2q2 + 1−q−2 + 3q−4q−6 + 2q−8q−12 + 2q−14 + q−18

[edit] "Similar" Knots (within the Atlas)

Same Alexander/Conway Polynomial: {}

Same Jones Polynomial (up to mirroring, q\leftrightarrow q^{-1}): {}

[edit] Vassiliev invariants

V2 and V3: (-1, 1)
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
−4 8 8 \frac{34}{3} \frac{38}{3} −32 -\frac{208}{3} -\frac{64}{3} −24 -\frac{32}{3} 32 -\frac{136}{3} -\frac{152}{3} \frac{2129}{30} \frac{662}{15} -\frac{1862}{45} \frac{463}{18} -\frac{751}{30}

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.

[edit] Khovanov Homology

The coefficients of the monomials trqj are shown, along with their alternating sums χ (fixed j, alternation over r). The squares with yellow highlighting are those on the "critical diagonals", where j−2r = s + 1 or j−2r = s−1, where s = -2 is the signature of 6 2. Nonzero entries off the critical diagonals (if any exist) are highlighted in red.   
\ r
  \  
j \
-4-3-2-1012χ
3      11
1       0
-1    21 1
-3   11  0
-5  11   0
-7 11    0
-9 1     -1
-111      1
Integral Khovanov Homology

(db, data source)

  
\dim{\mathcal G}_{2r+i}\operatorname{KH}^r_{\mathbb Z} i = −3 i = −1
r = −4 {\mathbb Z}
r = −3 {\mathbb Z}\oplus{\mathbb Z}_2 {\mathbb Z}
r = −2 {\mathbb Z}\oplus{\mathbb Z}_2 {\mathbb Z}
r = −1 {\mathbb Z}\oplus{\mathbb Z}_2 {\mathbb Z}
r = 0 {\mathbb Z}\oplus{\mathbb Z}_2 {\mathbb Z}^{2}
r = 1 {\mathbb Z}
r = 2 {\mathbb Z}_2 {\mathbb Z}

[edit] The Coloured Jones Polynomials

[edit] Computer Talk

Much of the above data can be recomputed by Mathematica using the package KnotTheory`. See A Sample KnotTheory` Session, or any of the Computer Talk sections above.

[edit] Modifying This Page

Read me first: Modifying Knot Pages

See/edit the Rolfsen Knot Page master template (intermediate).

See/edit the Rolfsen_Splice_Base (expert).

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