8 16

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8_17

Contents

Image:8 16.gif
(KnotPlot image)

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[edit] Knot presentations

Planar diagram presentation X6271 X14,6,15,5 X16,11,1,12 X12,7,13,8 X8394 X4,9,5,10 X10,15,11,16 X2,14,3,13
Gauss code 1, -8, 5, -6, 2, -1, 4, -5, 6, -7, 3, -4, 8, -2, 7, -3
Dowker-Thistlethwaite code 6 8 14 12 4 16 2 10
Conway Notation [.2.20]


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

Length is 8, width is 3,

Braid index is 3

Image:8 16_ML.gif Image:8 16_AP.gif
[{3, 10}, {2, 6}, {8, 11}, {9, 7}, {4, 8}, {6, 9}, {5, 3}, {10, 4}, {1, 5}, {11, 2}, {7, 1}]

[edit Notes on presentations of 8 16]

Knot 8_16.
Knot 8_16.
A graph, knot 8_16.
A graph, knot 8_16.

[edit] Three dimensional invariants

Symmetry type Reversible
Unknotting number 2
3-genus 3
Bridge index 3
Super bridge index 4
Nakanishi index 1
Maximal Thurston-Bennequin number [-8][-2]
Hyperbolic Volume 10.579
A-Polynomial See Data:8 16/A-polynomial

[edit Notes for 8 16's three dimensional invariants]

[edit] Four dimensional invariants

Smooth 4 genus 1
Topological 4 genus 1
Concordance genus 3
Rasmussen s-Invariant 2

[edit Notes for 8 16's four dimensional invariants]

[edit] Polynomial invariants

Alexander polynomial t3−4t2 + 8t−9 + 8t−1−4t−2 + t−3
Conway polynomial z6 + 2z4 + z2 + 1
2nd Alexander ideal (db, data sources) {1}
Determinant and Signature { 35, -2 }
Jones polynomial q2 + 3q−4 + 6q−1−6q−2 + 6q−3−5q−4 + 3q−5q−6
HOMFLY-PT polynomial (db, data sources) a2z6a4z4 + 4a2z4z4−2a4z2 + 5a2z2−2z2a4 + 2a2
Kauffman polynomial (db, data sources) z3a7 + 3z4a6z2a6 + 5z5a5−5z3a5 + 2za5 + 5z6a4−7z4a4 + 4z2a4a4 + 2z7a3 + 3z5a3−10z3a3 + 4za3 + 8z6a2−18z4a2 + 10z2a2−2a2 + 2z7az5a−6z3a + 3za + 3z6−8z4 + 5z2 + z5a−1−2z3a−1 + za−1
The A2 invariant q18 + q16q14 + q10q8 + 2q6q4 + 2q2 + 1 + q−4q−6
The G2 invariant q100−2q98 + 3q96−4q94 + 2q92q90−2q88 + 9q86−12q84 + 15q82−14q80 + 7q78 + 2q76−16q74 + 28q72−31q70 + 24q68−10q66−11q64 + 26q62−30q60 + 21q58−5q56−15q54 + 23q52−19q50 + 2q48 + 22q46−36q44 + 36q42−20q40−4q38 + 30q36−45q34 + 46q32−33q30 + 12q28 + 14q26−32q24 + 39q22−30q20 + 14q18 + 5q16−20q14 + 24q12−14q10q8 + 21q6−29q4 + 26q2−6−17q−2 + 35q−4−37q−6 + 28q−8−10q−10−12q−12 + 24q−14−25q−16 + 20q−18−9q−20−2q−22 + 6q−24−8q−26 + 5q−28−2q−30 + q−32

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

Same Alexander/Conway Polynomial: {10_156, K11n15, K11n56, K11n58,}

Same Jones Polynomial (up to mirroring, q\leftrightarrow q^{-1}): {10_156,}

[edit] Vassiliev invariants

V2 and V3: (1, -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 = -2 is the signature of 8 16. Nonzero entries off the critical diagonals (if any exist) are highlighted in red.   
\ r
  \  
j \
-5-4-3-2-10123χ
5        1-1
3       2 2
1      21 -1
-1     42  2
-3    33   0
-5   33    0
-7  23     1
-9 13      -2
-11 2       2
-131        -1
Integral Khovanov Homology

(db, data source)

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