8 6

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Image:8 6.gif
(KnotPlot image)

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Visit 8_6's page at Knotilus!

Visit 8 6's page at the original Knot Atlas!


[edit] Knot presentations

Planar diagram presentation X1425 X9,12,10,13 X3,11,4,10 X11,3,12,2 X5,14,6,15 X7,16,8,1 X15,6,16,7 X13,8,14,9
Gauss code -1, 4, -3, 1, -5, 7, -6, 8, -2, 3, -4, 2, -8, 5, -7, 6
Dowker-Thistlethwaite code 4 10 14 16 12 2 8 6
Conway Notation [332]


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

Length is 9, width is 4,

Braid index is 4

Image:8 6_ML.gif Image:8 6_AP.gif
[{10, 3}, {4, 2}, {3, 9}, {1, 4}, {8, 10}, {9, 5}, {2, 6}, {5, 7}, {6, 8}, {7, 1}]

[edit Notes on presentations of 8 6]

Knot 8_6.
Knot 8_6.
A graph, knot 8_6.
A graph, knot 8_6.

[edit] Three dimensional invariants

Symmetry type Reversible
Unknotting number 2
3-genus 2
Bridge index 2
Super bridge index {4,6}
Nakanishi index 1
Maximal Thurston-Bennequin number [-9][-1]
Hyperbolic Volume 7.47524
A-Polynomial See Data:8 6/A-polynomial

[edit Notes for 8 6'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 8 6's four dimensional invariants]

[edit] Polynomial invariants

Alexander polynomial −2t2 + 6t−7 + 6t−1−2t−2
Conway polynomial −2z4−2z2 + 1
2nd Alexander ideal (db, data sources) {1}
Determinant and Signature { 23, -2 }
Jones polynomial q−1 + 3q−1−4q−2 + 4q−3−4q−4 + 3q−5−2q−6 + q−7
HOMFLY-PT polynomial (db, data sources) z2a6 + a6z4a4−2z2a4a4z4a2−2z2a2a2 + z2 + 2
Kauffman polynomial (db, data sources) z4a8−2z2a8 + 2z5a7−4z3a7 + za7 + 2z6a6−4z4a6 + 3z2a6a6 + z7a5z5a5 + 2z3a5za5 + 3z6a4−6z4a4 + 6z2a4a4 + z7a3−2z5a3 + 5z3a3−3za3 + z6a2−2z2a2 + a2 + z5az3aza + z4−3z2 + 2
The A2 invariant q22 + q16q14q10q8q4 + 2q2 + 1 + q−2 + q−4
The G2 invariant q114q112 + 2q110−3q108 + q106−3q102 + 6q100−7q98 + 7q96−4q94−2q92 + 7q90−9q88 + 11q86−6q84 + q82 + 5q80−7q78 + 7q76−2q74−3q72 + 6q70−5q68 + 2q66 + 4q64−9q62 + 12q60−10q58 + 5q56 + q54−10q52 + 13q50−13q48 + 10q46−5q44−3q42 + 7q40−10q38 + 6q36−3q34−4q32 + 5q30−5q28q26 + 6q24−8q22 + 8q20−6q18q16 + 6q14−8q12 + 10q10−5q8 + 3q6 + 2q4−2q2 + 4−3q−2 + 4q−4q−6 + q−8 + q−10q−12 + 2q−14 + q−18

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

Same Alexander/Conway Polynomial: {K11n20, K11n151, K11n152,}

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

[edit] Vassiliev invariants

V2 and V3: (-2, 3)

[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 8 6. Nonzero entries off the critical diagonals (if any exist) are highlighted in red.   
\ r
  \  
j \
-6-5-4-3-2-1012χ
3        11
1         0
-1      31 2
-3     21  -1
-5    22   0
-7   22    0
-9  12     -1
-11 12      1
-13 1       -1
-151        1
Integral Khovanov Homology

(db, data source)

  
\dim{\mathcal G}_{2r+i}\operatorname{KH}^r_{\mathbb Z} i = −3 i = −1
r = −6 {\mathbb Z}
r = −5 {\mathbb Z}\oplus{\mathbb Z}_2 {\mathbb Z}
r = −4 {\mathbb Z}^{2}\oplus{\mathbb Z}_2 {\mathbb Z}
r = −3 {\mathbb Z}^{2}\oplus{\mathbb Z}_2^{2} {\mathbb Z}^{2}
r = −2 {\mathbb Z}^{2}\oplus{\mathbb Z}_2^{2} {\mathbb Z}^{2}
r = −1 {\mathbb Z}^{2}\oplus{\mathbb Z}_2^{2} {\mathbb Z}^{2}
r = 0 {\mathbb Z}\oplus{\mathbb Z}_2^{2} {\mathbb Z}^{3}
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).

Back to the top.

8_5

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