9 28

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9_27

9_29

Contents

Image:9 28.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 X15,18,16,1 X9,16,10,17 X17,10,18,11 X7283
Gauss code -1, 9, -2, 1, -4, 5, -9, 2, -7, 8, -3, 4, -5, 3, -6, 7, -8, 6
Dowker-Thistlethwaite code 4 8 12 2 16 14 6 18 10
Conway Notation [21,21,2+]


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.gif
Image:BraidPart4.gifImage:BraidPart4.gifImage:BraidPart1.gifImage:BraidPart4.gifImage:BraidPart1.gifImage:BraidPart1.gifImage:BraidPart0.gifImage:BraidPart0.gif
Image:BraidPart0.gifImage:BraidPart0.gifImage:BraidPart2.gifImage:BraidPart3.gifImage:BraidPart2.gifImage:BraidPart2.gifImage:BraidPart3.gifImage:BraidPart3.gif
Image:BraidPart0.gifImage:BraidPart0.gifImage:BraidPart0.gifImage:BraidPart4.gifImage:BraidPart0.gifImage:BraidPart0.gifImage:BraidPart4.gifImage:BraidPart4.gif

Length is 9, width is 4,

Braid index is 4

Image:9 28_ML.gif Image:9 28_AP.gif
[{11, 3}, {2, 9}, {5, 10}, {9, 11}, {4, 6}, {3, 5}, {7, 4}, {6, 1}, {8, 2}, {10, 7}, {1, 8}]

[edit Notes on presentations of 9 28]


[edit] Three dimensional invariants

Symmetry type Reversible
Unknotting number 1
3-genus 3
Bridge index 3
Super bridge index {4,6}
Nakanishi index 1
Maximal Thurston-Bennequin number [-9][-2]
Hyperbolic Volume 11.5632
A-Polynomial See Data:9 28/A-polynomial

[edit Notes for 9 28'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 9 28's four dimensional invariants]

[edit] Polynomial invariants

Alexander polynomial t3−5t2 + 12t−15 + 12t−1−5t−2 + t−3
Conway polynomial z6 + z4 + z2 + 1
2nd Alexander ideal (db, data sources) {1}
Determinant and Signature { 51, -2 }
Jones polynomial q2 + 3q−5 + 8q−1−8q−2 + 9q−3−8q−4 + 5q−5−3q−6 + q−7
HOMFLY-PT polynomial (db, data sources) z2a6 + a6−2z4a4−5z2a4−4a4 + z6a2 + 4z4a2 + 7z2a2 + 5a2z4−2z2−1
Kauffman polynomial (db, data sources) z4a8z2a8 + 3z5a7−4z3a7 + 2za7 + 4z6a6−4z4a6 + 2z2a6a6 + 3z7a5 + 2z5a5−9z3a5 + 6za5 + z8a4 + 8z6a4−17z4a4 + 12z2a4−4a4 + 6z7a3−5z5a3−7z3a3 + 6za3 + z8a2 + 7z6a2−19z4a2 + 14z2a2−5a2 + 3z7a−3z5a−4z3a + 3za + 3z6−7z4 + 5z2−1 + z5a−1−2z3a−1 + za−1
The A2 invariant q22q18 + q16−3q14q12 + 4q6 + 3q2q−2 + q−4q−6
The G2 invariant q114−2q112 + 4q110−6q108 + 4q106−3q104−4q102 + 13q100−20q98 + 27q96−25q94 + 15q92 + 6q90−29q88 + 54q86−62q84 + 53q82−29q80−10q78 + 49q76−72q74 + 73q72−44q70 + 3q68 + 32q66−53q64 + 37q62−7q60−33q58 + 56q56−58q54 + 23q52 + 30q50−81q48 + 105q46−99q44 + 53q42 + 8q40−67q38 + 103q36−103q34 + 79q32−24q30−28q28 + 63q26−64q24 + 43q22−34q18 + 52q16−35q14 + 5q12 + 41q10−70q8 + 77q6−52q4 + 5q2 + 39−70q−2 + 76q−4−56q−6 + 24q−8 + 8q−10−33q−12 + 39q−14−32q−16 + 19q−18−5q−20−5q−22 + 7q−24−8q−26 + 5q−28−2q−30 + q−32

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

Same Alexander/Conway Polynomial: {9_29, 10_163, K11n87,}

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

[edit] Vassiliev invariants

V2 and V3: (1, 0)

[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 28. Nonzero entries off the critical diagonals (if any exist) are highlighted in red.   
\ r
  \  
j \
-6-5-4-3-2-10123χ
5         1-1
3        2 2
1       31 -2
-1      52  3
-3     44   0
-5    54    1
-7   34     1
-9  25      -3
-11 13       2
-13 2        -2
-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}^{2}\oplus{\mathbb Z}_2 {\mathbb Z}
r = −4 {\mathbb Z}^{3}\oplus{\mathbb Z}_2^{2} {\mathbb Z}^{2}
r = −3 {\mathbb Z}^{5}\oplus{\mathbb Z}_2^{3} {\mathbb Z}^{3}
r = −2 {\mathbb Z}^{4}\oplus{\mathbb Z}_2^{5} {\mathbb Z}^{5}
r = −1 {\mathbb Z}^{4}\oplus{\mathbb Z}_2^{4} {\mathbb Z}^{4}
r = 0 {\mathbb Z}^{4}\oplus{\mathbb Z}_2^{4} {\mathbb Z}^{5}
r = 1 {\mathbb Z}^{2}\oplus{\mathbb Z}_2^{3} {\mathbb Z}^{3}
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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