8 8

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Image:8 8.gif
(KnotPlot image)

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[edit] Knot presentations

Planar diagram presentation X1425 X3849 X11,15,12,14 X5,13,6,12 X13,7,14,6 X9,1,10,16 X15,11,16,10 X7283
Gauss code -1, 8, -2, 1, -4, 5, -8, 2, -6, 7, -3, 4, -5, 3, -7, 6
Dowker-Thistlethwaite code 4 8 12 2 16 14 6 10
Conway Notation [2312]


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

Length is 9, width is 4,

Braid index is 4

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

[edit Notes on presentations of 8 8]

Knot 8_8.
Knot 8_8.
A graph, knot 8_8.
A graph, knot 8_8.

[edit] Three dimensional invariants

Symmetry type Reversible
Unknotting number 2
3-genus 2
Bridge index 2
Super bridge index {4,5}
Nakanishi index 1
Maximal Thurston-Bennequin number [-4][-6]
Hyperbolic Volume 7.80134
A-Polynomial See Data:8 8/A-polynomial

[edit Notes for 8 8's three dimensional invariants]

[edit] Four dimensional invariants

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

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

[edit] Polynomial invariants

Alexander polynomial 2t2−6t + 9−6t−1 + 2t−2
Conway polynomial 2z4 + 2z2 + 1
2nd Alexander ideal (db, data sources) {1}
Determinant and Signature { 25, 0 }
Jones polynomial q5 + 2q4−3q3 + 4q2−4q + 5−3q−1 + 2q−2q−3
HOMFLY-PT polynomial (db, data sources) z4a−2 + z4a2z2 + 2z2a−2z2a−4 + 2z2a2 + a−2a−4 + 2
Kauffman polynomial (db, data sources) z7a−1 + z7a−3 + 4z6a−2 + 2z6a−4 + 2z6 + 2az5 + z5a−1 + z5a−5 + 2a2z4−9z4a−2−6z4a−4z4 + a3z3−3z3a−1−5z3a−3−3z3a−5−2a2z2 + 5z2a−2 + 4z2a−4z2a3zaz + za−1 + 3za−3 + 2za−5 + a2a−2a−4 + 2
The A2 invariant q10q4 + 2q2 + 1 + 2q−2 + q−4 + q−8q−10q−16
The G2 invariant q52q50 + 2q48−2q46−3q40 + 4q38−5q36 + 4q34−5q32 + q30 + 3q28−6q26 + 8q24−9q22 + 7q20−4q18−3q16 + 7q14−8q12 + 9q10q8−3q6 + 6q4−3q2 + 1 + 6q−2−10q−4 + 12q−6−5q−8 + 10q−12−14q−14 + 17q−16−11q−18 + 3q−20 + 4q−22−9q−24 + 14q−26−10q−28 + 6q−30 + q−32−5q−34 + 7q−36−5q−38 + 4q−42−8q−44 + 7q−46−3q−48−4q−50 + 10q−52−13q−54 + 10q−56−5q−58−4q−60 + 7q−62−10q−64 + 9q−66−5q−68 + 2q−72−4q−74 + 3q−76q−78 + q−80

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

Same Alexander/Conway Polynomial: {10_129, K11n39, K11n45, K11n50, K11n132,}

Same Jones Polynomial (up to mirroring, q\leftrightarrow q^{-1}): {10_129,}

[edit] Vassiliev invariants

V2 and V3: (2, 1)

[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 = 0 is the signature of 8 8. Nonzero entries off the critical diagonals (if any exist) are highlighted in red.   
\ r
  \  
j \
-3-2-1012345χ
11        1-1
9       1 1
7      21 -1
5     21  1
3    22   0
1   32    1
-1  13     2
-3 12      -1
-5 1       1
-71        -1
Integral Khovanov Homology

(db, data source)

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