9 15

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Image:9 15.gif
(KnotPlot image)

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Visit 9 15's page at the original Knot Atlas!


[edit] Knot presentations

Planar diagram presentation X1425 X7,10,8,11 X3948 X9,3,10,2 X13,17,14,16 X5,15,6,14 X15,7,16,6 X11,1,12,18 X17,13,18,12
Gauss code -1, 4, -3, 1, -6, 7, -2, 3, -4, 2, -8, 9, -5, 6, -7, 5, -9, 8
Dowker-Thistlethwaite code 4 8 14 10 2 18 16 6 12
Conway Notation [2322]


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

Length is 10, width is 5,

Braid index is 5

Image:9 15_ML.gif Image:9 15_AP.gif
[{11, 4}, {5, 2}, {4, 10}, {1, 5}, {6, 11}, {3, 7}, {2, 6}, {8, 3}, {7, 9}, {10, 8}, {9, 1}]

[edit Notes on presentations of 9 15]


[edit] Three dimensional invariants

Symmetry type Reversible
Unknotting number 2
3-genus 2
Bridge index 2
Super bridge index {4,5}
Nakanishi index 1
Maximal Thurston-Bennequin number [-1][-10]
Hyperbolic Volume 9.8855
A-Polynomial See Data:9 15/A-polynomial

[edit Notes for 9 15'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 15's four dimensional invariants]

[edit] Polynomial invariants

Alexander polynomial −2t2 + 10t−15 + 10t−1−2t−2
Conway polynomial −2z4 + 2z2 + 1
2nd Alexander ideal (db, data sources) {1}
Determinant and Signature { 39, 2 }
Jones polynomial q8 + 2q7−4q6 + 6q5−6q4 + 7q3−6q2 + 4q−2 + q−1
HOMFLY-PT polynomial (db, data sources) z4a−2z4a−4z2a−2 + 2z2a−6 + z2a−2 + a−4 + a−6a−8 + 1
Kauffman polynomial (db, data sources) z8a−4 + z8a−6 + 2z7a−3 + 4z7a−5 + 2z7a−7 + 2z6a−2 + z6a−4 + z6a−6 + 2z6a−8 + 2z5a−1z5a−3−7z5a−5−3z5a−7 + z5a−9−4z4a−6−5z4a−8 + z4−3z3a−1 + 5z3a−5z3a−7−3z3a−9−3z2a−2−2z2a−4 + 2z2a−6 + 3z2a−8−2z2 + za−1 + za−3za−5 + za−7 + 2za−9 + a−2 + a−4a−6a−8 + 1
The A2 invariant q4 + 2q−2−2q−4 + 2q−12 + 2q−16q−20 + q−22q−24q−26
The G2 invariant q18q16 + 3q14−3q12 + 2q10−3q6 + 8q4−9q2 + 11−9q−2 + 5q−4 + 4q−6−13q−8 + 23q−10−26q−12 + 21q−14−13q−16−5q−18 + 20q−20−31q−22 + 33q−24−20q−26 + 2q−28 + 14q−30−23q−32 + 15q−34−2q−36−13q−38 + 24q−40−23q−42 + 9q−44 + 17q−46−34q−48 + 46q−50−42q−52 + 21q−54 + 6q−56−28q−58 + 43q−60−44q−62 + 36q−64−11q−66−11q−68 + 26q−70−30q−72 + 20q−74q−76−15q−78 + 21q−80−15q−82 + 3q−84 + 18q−86−31q−88 + 33q−90−23q−92 + 18q−96−32q−98 + 33q−100−24q−102 + 10q−104 + 3q−106−15q−108 + 17q−110−15q−112 + 9q−114−3q−116−2q−118 + 3q−120−4q−122 + 3q−124q−126 + q−128

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

Same Alexander/Conway Polynomial: {10_165, K11n63, K11n101,}

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

[edit] Vassiliev invariants

V2 and V3: (2, 5)

[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 15. Nonzero entries off the critical diagonals (if any exist) are highlighted in red.   
\ r
  \  
j \
-2-101234567χ
17         1-1
15        1 1
13       31 -2
11      31  2
9     33   0
7    43    1
5   23     1
3  24      -2
1 13       2
-1 1        -1
-31         1
Integral Khovanov Homology

(db, data source)

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