9 18

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Contents

Image:9 18.gif
(KnotPlot image)

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[edit] Knot presentations

Planar diagram presentation X1425 X3,12,4,13 X5,14,6,15 X9,18,10,1 X17,6,18,7 X7,16,8,17 X15,8,16,9 X13,10,14,11 X11,2,12,3
Gauss code -1, 9, -2, 1, -3, 5, -6, 7, -4, 8, -9, 2, -8, 3, -7, 6, -5, 4
Dowker-Thistlethwaite code 4 12 14 16 18 2 10 8 6
Conway Notation [3222]


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

Length is 11, width is 4,

Braid index is 4

Image:9 18_ML.gif Image:9 18_AP.gif
[{11, 5}, {1, 9}, {8, 10}, {9, 11}, {10, 6}, {5, 7}, {4, 8}, {6, 3}, {2, 4}, {3, 1}, {7, 2}]

[edit Notes on presentations of 9 18]


[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 [-14][3]
Hyperbolic Volume 10.0577
A-Polynomial See Data:9 18/A-polynomial

[edit Notes for 9 18's three dimensional invariants]

[edit] Four dimensional invariants

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

[edit Notes for 9 18's four dimensional invariants]

[edit] Polynomial invariants

Alexander polynomial 4t2−10t + 13−10t−1 + 4t−2
Conway polynomial 4z4 + 6z2 + 1
2nd Alexander ideal (db, data sources) {1}
Determinant and Signature { 41, -4 }
Jones polynomial q−2−2q−3 + 5q−4−6q−5 + 7q−6−7q−7 + 6q−8−4q−9 + 2q−10q−11
HOMFLY-PT polynomial (db, data sources) z2a10a10 + z4a8 + z2a8 + 2z4a6 + 4z2a6 + a6 + z4a4 + 2z2a4 + a4
Kauffman polynomial (db, data sources) z5a13−3z3a13 + 2za13 + 2z6a12−5z4a12 + 3z2a12 + 2z7a11−3z5a11 + z8a10 + z6a10−2z4a10−2z2a10 + a10 + 4z7a9−5z5a9 + z3a9 + z8a8 + 2z6a8−2z4a8 + 2z7a7 + z5a7−4z3a7 + 2za7 + 3z6a6−4z4a6 + 3z2a6a6 + 2z5a5−2z3a5 + z4a4−2z2a4 + a4
The A2 invariant q34−2q28 + q26 + q20q18 + 2q16 + q12 + 2q10q8 + q6
The G2 invariant q176q174 + 3q172−4q170 + 3q168−2q166−2q164 + 10q162−15q160 + 18q158−15q156 + 5q154 + 9q152−26q150 + 36q148−37q146 + 23q144−2q142−24q140 + 37q138−38q136 + 27q134−6q132−16q130 + 24q128−23q126 + 5q124 + 16q122−29q120 + 31q118−16q116−7q114 + 34q112−51q110 + 54q108−40q106 + 9q104 + 23q102−48q100 + 58q98−47q96 + 23q94 + 4q92−26q90 + 32q88−25q86 + 4q84 + 16q82−23q80 + 20q78−2q76−18q74 + 35q72−36q70 + 29q68−12q66−11q64 + 29q62−34q60 + 33q58−18q56 + 6q54 + 6q52−14q50 + 16q48−13q46 + 9q44−2q42q40 + 3q38−3q36 + 3q34q32 + q30

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

Same Alexander/Conway Polynomial: {K11a246,}

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

[edit] Vassiliev invariants

V2 and V3: (6, -15)

[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 = -4 is the signature of 9 18. Nonzero entries off the critical diagonals (if any exist) are highlighted in red.   
\ r
  \  
j \
-9-8-7-6-5-4-3-2-10χ
-3         11
-5        21-1
-7       3  3
-9      32  -1
-11     43   1
-13    33    0
-15   34     -1
-17  13      2
-19 13       -2
-21 1        1
-231         -1
Integral Khovanov Homology

(db, data source)

  
\dim{\mathcal G}_{2r+i}\operatorname{KH}^r_{\mathbb Z} i = −5 i = −3
r = −9 {\mathbb Z}
r = −8 {\mathbb Z}\oplus{\mathbb Z}_2 {\mathbb Z}
r = −7 {\mathbb Z}^{3}\oplus{\mathbb Z}_2 {\mathbb Z}
r = −6 {\mathbb Z}^{3}\oplus{\mathbb Z}_2^{3} {\mathbb Z}^{3}
r = −5 {\mathbb Z}^{4}\oplus{\mathbb Z}_2^{3} {\mathbb Z}^{3}
r = −4 {\mathbb Z}^{3}\oplus{\mathbb Z}_2^{4} {\mathbb Z}^{4}
r = −3 {\mathbb Z}^{3}\oplus{\mathbb Z}_2^{3} {\mathbb Z}^{3}
r = −2 {\mathbb Z}^{2}\oplus{\mathbb Z}_2^{3} {\mathbb Z}^{3}
r = −1 {\mathbb Z}_2^{2} {\mathbb Z}^{2}
r = 0 {\mathbb Z} {\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.

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Retrieved from "http://katlas.org/wiki/9_18"
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