9 31

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Image:9 31.gif
(KnotPlot image)

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[edit] Knot presentations

Planar diagram presentation X1425 X3,10,4,11 X11,1,12,18 X5,13,6,12 X17,7,18,6 X7,14,8,15 X13,16,14,17 X15,8,16,9 X9,2,10,3
Gauss code -1, 9, -2, 1, -4, 5, -6, 8, -9, 2, -3, 4, -7, 6, -8, 7, -5, 3
Dowker-Thistlethwaite code 4 10 12 14 2 18 16 8 6
Conway Notation [2111112]


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:BraidPart1.gifImage:BraidPart0.gifImage:BraidPart0.gif
Image:BraidPart0.gifImage:BraidPart0.gifImage:BraidPart2.gifImage:BraidPart0.gifImage:BraidPart2.gifImage:BraidPart3.gifImage:BraidPart2.gifImage:BraidPart3.gifImage:BraidPart3.gif
Image:BraidPart0.gifImage: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:9 31_ML.gif Image:9 31_AP.gif
[{11, 7}, {1, 9}, {8, 10}, {9, 11}, {10, 6}, {7, 2}, {5, 1}, {6, 3}, {2, 4}, {3, 5}, {4, 8}]

[edit Notes on presentations of 9 31]


[edit] Three dimensional invariants

Symmetry type Reversible
Unknotting number 2
3-genus 3
Bridge index 2
Super bridge index {4,6}
Nakanishi index 1
Maximal Thurston-Bennequin number [-9][-2]
Hyperbolic Volume 11.6863
A-Polynomial See Data:9 31/A-polynomial

[edit Notes for 9 31'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 31's four dimensional invariants]

[edit] Polynomial invariants

Alexander polynomial t3−5t2 + 13t−17 + 13t−1−5t−2 + t−3
Conway polynomial z6 + z4 + 2z2 + 1
2nd Alexander ideal (db, data sources) {1}
Determinant and Signature { 55, -2 }
Jones polynomial q2 + 3q−5 + 8q−1−9q−2 + 10q−3−8q−4 + 6q−5−4q−6 + q−7
HOMFLY-PT polynomial (db, data sources) z2a6−2z4a4−4z2a4−2a4 + z6a2 + 4z4a2 + 7z2a2 + 4a2z4−2z2−1
Kauffman polynomial (db, data sources) z4a8 + 4z5a7−4z3a7 + 6z6a6−8z4a6 + 3z2a6 + 4z7a5 + z5a5−8z3a5 + 3za5 + z8a4 + 11z6a4−23z4a4 + 13z2a4−2a4 + 7z7a3−7z5a3−5z3a3 + 5za3 + z8a2 + 8z6a2−21z4a2 + 15z2a2−4a2 + 3z7a−3z5a−3z3a + 3za + 3z6−7z4 + 5z2−1 + z5a−1−2z3a−1 + za−1
The A2 invariant q22q20−2q18 + q16−2q14 + q12 + q10 + 3q6q4 + 3q2q−2 + q−4q−6
The G2 invariant q114−3q112 + 6q110−10q108 + 8q106−4q104−5q102 + 22q100−33q98 + 45q96−41q94 + 16q92 + 17q90−54q88 + 80q86−86q84 + 65q82−20q80−33q78 + 75q76−90q74 + 70q72−28q70−23q68 + 48q66−52q64 + 24q62 + 26q60−67q58 + 82q56−60q54 + 2q52 + 65q50−121q48 + 136q46−108q44 + 48q42 + 32q40−96q38 + 129q36−115q34 + 68q32−4q30−51q28 + 73q26−55q24 + 22q22 + 29q20−57q18 + 59q16−26q14−24q12 + 72q10−94q8 + 83q6−43q4−9q2 + 55−80q−2 + 81q−4−55q−6 + 18q−8 + 13q−10−35q−12 + 38q−14−31q−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: {K11n11, K11n22, K11n112, K11n127,}

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

[edit] Vassiliev invariants

V2 and V3: (2, -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 31. 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     54   -1
-5    54    1
-7   35     2
-9  35      -2
-11 13       2
-13 3        -3
-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}^{3}\oplus{\mathbb Z}_2 {\mathbb Z}
r = −4 {\mathbb Z}^{3}\oplus{\mathbb Z}_2^{3} {\mathbb Z}^{3}
r = −3 {\mathbb Z}^{5}\oplus{\mathbb Z}_2^{3} {\mathbb Z}^{3}
r = −2 {\mathbb Z}^{5}\oplus{\mathbb Z}_2^{5} {\mathbb Z}^{5}
r = −1 {\mathbb Z}^{4}\oplus{\mathbb Z}_2^{5} {\mathbb Z}^{5}
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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