9 8

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9_7

9_9

Contents

Image:9 8.gif
(KnotPlot image)

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Visit 9 8's page at the original Knot Atlas!


[edit] Knot presentations

Planar diagram presentation X1425 X3849 X5,14,6,15 X9,1,10,18 X11,17,12,16 X15,13,16,12 X17,11,18,10 X13,6,14,7 X7283
Gauss code -1, 9, -2, 1, -3, 8, -9, 2, -4, 7, -5, 6, -8, 3, -6, 5, -7, 4
Dowker-Thistlethwaite code 4 8 14 2 18 16 6 12 10
Conway Notation [2412]


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

Length is 10, width is 5,

Braid index is 5

Image:9 8_ML.gif Image:9 8_AP.gif
[{12, 2}, {1, 10}, {8, 11}, {10, 12}, {9, 3}, {2, 8}, {4, 9}, {3, 5}, {6, 4}, {5, 7}, {11, 6}, {7, 1}]

[edit Notes on presentations of 9 8]


[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 [-8][-3]
Hyperbolic Volume 8.19235
A-Polynomial See Data:9 8/A-polynomial

[edit Notes for 9 8'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 9 8's four dimensional invariants]

[edit] Polynomial invariants

Alexander polynomial −2t2 + 8t−11 + 8t−1−2t−2
Conway polynomial 1−2z4
2nd Alexander ideal (db, data sources) {1}
Determinant and Signature { 31, -2 }
Jones polynomial q3−2q2 + 3q−4 + 5q−1−5q−2 + 5q−3−3q−4 + 2q−5q−6
HOMFLY-PT polynomial (db, data sources) a6 + 2z2a4 + 2a4z4a2z2a2z4−2z2−1 + z2a−2 + a−2
Kauffman polynomial (db, data sources) a2z8 + z8 + 2a3z7 + 4az7 + 2z7a−1 + 2a4z6 + z6a−2z6 + 2a5z5−3a3z5−13az5−8z5a−1 + 2a6z4−4a2z4−4z4a−2−6z4 + a7z3 + 2a3z3 + 11az3 + 8z3a−1−2a6z2−3a4z2 + 2a2z2 + 4z2a−2 + 7z2a7za5za3z−3az−2za−1 + a6 + 2a4a−2−1
The A2 invariant q20q18 + q16 + q12 + 2q10 + q6q4q−2 + q−4 + q−10
The G2 invariant q100q98 + 2q96−2q94−3q88 + 4q86−5q84 + 4q82−4q80 + 3q76−5q74 + 6q72−7q70 + 5q68−4q66 + 3q62−5q60 + 9q58−6q56 + 5q54q52−2q50 + 7q48−5q46 + 4q44 + 3q42−4q40 + 7q38−3q36−3q34 + 11q32−13q30 + 10q28−5q26−5q24 + 14q22−17q20 + 14q18−10q16 + 7q12−12q10 + 12q8−9q6 + 3q4 + 3q2−7 + 7q−2−3q−4−2q−6 + 8q−8−10q−10 + 7q−12−8q−16 + 14q−18−15q−20 + 10q−22−2q−24−6q−26 + 11q−28−11q−30 + 10q−32−3q−34q−36 + 3q−38−4q−40 + 3q−42q−44 + q−46

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

Same Alexander/Conway Polynomial: {8_14, 10_131,}

Same Jones Polynomial (up to mirroring, q\leftrightarrow q^{-1}): {K11n60,}

[edit] Vassiliev invariants

V2 and V3: (0, -2)

[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 9 8. Nonzero entries off the critical diagonals (if any exist) are highlighted in red.   
\ r
  \  
j \
-5-4-3-2-101234χ
7         11
5        1 -1
3       21 1
1      21  -1
-1     32   1
-3    33    0
-5   22     0
-7  13      2
-9 12       -1
-11 1        1
-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}\oplus{\mathbb Z}_2 {\mathbb Z}
r = −3 {\mathbb Z}^{2}\oplus{\mathbb Z}_2 {\mathbb Z}
r = −2 {\mathbb Z}^{3}\oplus{\mathbb Z}_2^{2} {\mathbb Z}^{2}
r = −1 {\mathbb Z}^{2}\oplus{\mathbb Z}_2^{3} {\mathbb Z}^{3}
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}\oplus{\mathbb Z}_2^{2} {\mathbb Z}^{2}
r = 3 {\mathbb Z}\oplus{\mathbb Z}_2 {\mathbb Z}
r = 4 {\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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Retrieved from "http://katlas.org/wiki/9_8"
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