9 27

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Image:9 27.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 X13,17,14,16 X7,14,8,15 X15,6,16,7 X17,9,18,8 X9,2,10,3
Gauss code -1, 9, -2, 1, -4, 7, -6, 8, -9, 2, -3, 4, -5, 6, -7, 5, -8, 3
Dowker-Thistlethwaite code 4 10 12 14 2 18 16 6 8
Conway Notation [212112]


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:BraidPart1.gifImage:BraidPart0.gifImage:BraidPart1.gifImage:BraidPart0.gif
Image:BraidPart0.gifImage:BraidPart0.gifImage:BraidPart2.gifImage:BraidPart0.gifImage:BraidPart2.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 9, width is 4,

Braid index is 4

Image:9 27_ML.gif Image:9 27_AP.gif
[{11, 7}, {1, 9}, {8, 10}, {9, 11}, {10, 4}, {7, 3}, {5, 1}, {4, 6}, {2, 5}, {3, 8}, {6, 2}]

[edit Notes on presentations of 9 27]


[edit] Three dimensional invariants

Symmetry type Reversible
Unknotting number 1
3-genus 3
Bridge index 2
Super bridge index {4,6}
Nakanishi index 1
Maximal Thurston-Bennequin number [-6][-5]
Hyperbolic Volume 11.
A-Polynomial See Data:9 27/A-polynomial

[edit Notes for 9 27's three dimensional invariants]

[edit] Four dimensional invariants

Smooth 4 genus 0
Topological 4 genus 0
Concordance genus 0
Rasmussen s-Invariant 0

[edit Notes for 9 27's four dimensional invariants]

[edit] Polynomial invariants

Alexander polynomial t3 + 5t2−11t + 15−11t−1 + 5t−2t−3
Conway polynomial z6z4 + 1
2nd Alexander ideal (db, data sources) {1}
Determinant and Signature { 49, 0 }
Jones polynomial q4−3q3 + 5q2−7q + 9−8q−1 + 7q−2−5q−3 + 3q−4q−5
HOMFLY-PT polynomial (db, data sources) z6 + 2a2z4 + z4a−2−4z4a4z2 + 5a2z2 + 2z2a−2−6z2a4 + 3a2 + a−2−2
Kauffman polynomial (db, data sources) a2z8 + z8 + 3a3z7 + 6az7 + 3z7a−1 + 3a4z6 + 6a2z6 + 4z6a−2 + 7z6 + a5z5−4a3z5−8az5 + 3z5a−3−7a4z4−17a2z4−5z4a−2 + z4a−4−16z4−2a5z3−2a3z3−4z3a−1−4z3a−3 + 4a4z2 + 12a2z2 + 3z2a−2z2a−4 + 12z2 + a5z + 2a3z + 2az + 2za−1 + za−3a4−3a2a−2−2
The A2 invariant q16 + q12q10 + 2q8 + 2q2−1 + 2q−2−2q−4 + q−8q−10 + q−12
The G2 invariant q80−2q78 + 5q76−8q74 + 7q72−4q70−6q68 + 19q66−29q64 + 33q62−29q60 + 6q58 + 22q56−50q54 + 65q52−56q50 + 32q48 + 6q46−42q44 + 61q42−58q40 + 33q38 + 3q36−32q34 + 41q32−25q30q28 + 36q26−53q24 + 50q22−24q20−20q18 + 64q16−89q14 + 88q12−53q10 + 8q8 + 45q6−81q4 + 87q2−67 + 26q−2 + 16q−4−47q−6 + 48q−8−25q−10−5q−12 + 31q−14−41q−16 + 24q−18 + q−20−35q−22 + 58q−24−59q−26 + 43q−28−9q−30−22q−32 + 45q−34−51q−36 + 45q−38−28q−40 + 7q−42 + 11q−44−23q−46 + 24q−48−18q−50 + 13q−52−4q−54−2q−56 + 4q−58−6q−60 + 4q−62−2q−64 + q−66

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

Same Alexander/Conway Polynomial: {K11n4, K11n21, K11n172,}

Same Jones Polynomial (up to mirroring, q\leftrightarrow q^{-1}): {K11n83,}

[edit] Vassiliev invariants

V2 and V3: (0, -1)

[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 = 0 is the signature of 9 27. Nonzero entries off the critical diagonals (if any exist) are highlighted in red.   
\ r
  \  
j \
-5-4-3-2-101234χ
9         11
7        2 -2
5       31 2
3      42  -2
1     53   2
-1    45    1
-3   34     -1
-5  24      2
-7 13       -2
-9 2        2
-111         -1
Integral Khovanov Homology

(db, data source)

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