8 13

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Image:8 13.gif
(KnotPlot image)

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[edit] Knot presentations

Planar diagram presentation X1425 X3,10,4,11 X11,1,12,16 X5,13,6,12 X15,7,16,6 X7,15,8,14 X13,9,14,8 X9,2,10,3
Gauss code -1, 8, -2, 1, -4, 5, -6, 7, -8, 2, -3, 4, -7, 6, -5, 3
Dowker-Thistlethwaite code 4 10 12 14 2 16 8 6
Conway Notation [31112]


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

Length is 9, width is 4,

Braid index is 4

Image:8 13_ML.gif Image:8 13_AP.gif
[{10, 5}, {1, 8}, {6, 9}, {8, 10}, {9, 4}, {5, 2}, {3, 1}, {4, 7}, {2, 6}, {7, 3}]

[edit Notes on presentations of 8 13]

Knot 8_13.
Knot 8_13.
A graph, knot 8_13.
A graph, knot 8_13.

[edit] Three dimensional invariants

Symmetry type Reversible
Unknotting number 1
3-genus 2
Bridge index 2
Super bridge index {4,5}
Nakanishi index 1
Maximal Thurston-Bennequin number [-4][-6]
Hyperbolic Volume 8.53123
A-Polynomial See Data:8 13/A-polynomial

[edit Notes for 8 13's three dimensional invariants]

[edit] Four dimensional invariants

Smooth 4 genus 1
Topological 4 genus 1
Concordance genus 2
Rasmussen s-Invariant 0

[edit Notes for 8 13's four dimensional invariants]

[edit] Polynomial invariants

Alexander polynomial 2t2−7t + 11−7t−1 + 2t−2
Conway polynomial 2z4 + z2 + 1
2nd Alexander ideal (db, data sources) {1}
Determinant and Signature { 29, 0 }
Jones polynomial q5 + 2q4−3q3 + 5q2−5q + 5−4q−1 + 3q−2q−3
HOMFLY-PT polynomial (db, data sources) z4a−2 + z4a2z2 + 2z2a−2z2a−4 + z2 + 2a−2a−4
Kauffman polynomial (db, data sources) z7a−1 + z7a−3 + 5z6a−2 + 2z6a−4 + 3z6 + 4az5 + 4z5a−1 + z5a−3 + z5a−5 + 3a2z4−11z4a−2−6z4a−4−2z4 + a3z3−4az3−9z3a−1−7z3a−3−3z3a−5−2a2z2 + 7z2a−2 + 5z2a−4 + az + 3za−1 + 4za−3 + 2za−5−2a−2a−4
The A2 invariant q10 + q8 + q6q4 + q2−1 + q−2 + q−4 + q−6 + 2q−8q−10q−16
The G2 invariant q52−2q50 + 3q48−4q46 + q44−3q40 + 9q38−11q36 + 12q34−8q32 + 6q28−13q26 + 18q24−16q22 + 10q20−8q16 + 14q14−10q12 + 4q10 + 2q8−10q6 + 9q4−3q2−7 + 17q−2−22q−4 + 19q−6−6q−8−9q−10 + 19q−12−26q−14 + 26q−16−14q−18 + 3q−20 + 11q−22−16q−24 + 21q−26−10q−28 + q−30 + 6q−32−9q−34 + 8q−36−6q−40 + 14q−42−15q−44 + 9q−46 + q−48−13q−50 + 18q−52−19q−54 + 11q−56−4q−58−6q−60 + 11q−62−13q−64 + 10q−66−4q−68q−70 + 2q−72−4q−74 + 3q−76q−78 + q−80

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

Same Alexander/Conway Polynomial: {}

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

[edit] Vassiliev invariants

V2 and V3: (1, 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 8 13. Nonzero entries off the critical diagonals (if any exist) are highlighted in red.   
\ r
  \  
j \
-3-2-1012345χ
11        1-1
9       1 1
7      21 -1
5     31  2
3    22   0
1   33    0
-1  23     1
-3 12      -1
-5 2       2
-71        -1
Integral Khovanov Homology

(db, data source)

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