8 9

From Knot Atlas

Jump to: navigation, search


8_8

8_10

Contents

Image:8 9.gif
(KnotPlot image)

See the full Rolfsen Knot Table.

Visit 8 9's page at the Knot Server (KnotPlot driven, includes 3D interactive images!)

Visit 8_9's page at Knotilus!

Visit 8 9's page at the original Knot Atlas!


[edit] Knot presentations

Planar diagram presentation X6271 X14,8,15,7 X10,3,11,4 X2,13,3,14 X12,5,13,6 X4,11,5,12 X16,10,1,9 X8,16,9,15
Gauss code 1, -4, 3, -6, 5, -1, 2, -8, 7, -3, 6, -5, 4, -2, 8, -7
Dowker-Thistlethwaite code 6 10 12 14 16 4 2 8
Conway Notation [3113]


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

Length is 8, width is 3,

Braid index is 3

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

[edit Notes on presentations of 8 9]

Knot 8_9.
Knot 8_9.
A graph, knot 8_9.
A graph, knot 8_9.

[edit] Three dimensional invariants

Symmetry type Fully amphicheiral
Unknotting number 1
3-genus 3
Bridge index 2
Super bridge index {3,6}
Nakanishi index 1
Maximal Thurston-Bennequin number [-5][-5]
Hyperbolic Volume 7.58818
A-Polynomial See Data:8 9/A-polynomial

[edit Notes for 8 9'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 8 9's four dimensional invariants]

[edit] Polynomial invariants

Alexander polynomial t3 + 3t2−5t + 7−5t−1 + 3t−2t−3
Conway polynomial z6−3z4−2z2 + 1
2nd Alexander ideal (db, data sources) {1}
Determinant and Signature { 25, 0 }
Jones polynomial q4−2q3 + 3q2−4q + 5−4q−1 + 3q−2−2q−3 + q−4
HOMFLY-PT polynomial (db, data sources) z6 + a2z4 + z4a−2−5z4 + 3a2z2 + 3z2a−2−8z2 + 2a2 + 2a−2−3
Kauffman polynomial (db, data sources) az7 + z7a−1 + 2a2z6 + 2z6a−2 + 4z6 + 2a3z5 + 2z5a−3 + a4z4−4a2z4−4z4a−2 + z4a−4−10z4−4a3z3az3z3a−1−4z3a−3−2a4z2 + 4a2z2 + 4z2a−2−2z2a−4 + 12z2 + a3z + az + za−1 + za−3−2a2−2a−2−3
The A2 invariant q12 + q8q4 + q2−1 + q−2q−4 + q−8 + q−12
The G2 invariant q66q64 + 2q62−3q60 + q58−3q54 + 6q52−6q50 + 7q48−5q46 + 6q42−10q40 + 12q38−8q36 + 4q34 + 3q32−6q30 + 11q28−6q26 + 2q24 + 4q22−7q20 + 5q18−8q14 + 11q12−10q10 + 9q8−3q6−10q4 + 14q2−17 + 14q−2−10q−4−3q−6 + 9q−8−10q−10 + 11q−12−8q−14 + 5q−18−7q−20 + 4q−22 + 2q−24−6q−26 + 11q−28−6q−30 + 3q−32 + 4q−34−8q−36 + 12q−38−10q−40 + 6q−42−5q−46 + 7q−48−6q−50 + 6q−52−3q−54 + q−58−3q−60 + 2q−62q−64 + q−66

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

Same Alexander/Conway Polynomial: {10_155, K11n37,}

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

[edit] Vassiliev invariants

V2 and V3: (-2, 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 = 0 is the signature of 8 9. Nonzero entries off the critical diagonals (if any exist) are highlighted in red.   
\ r
  \  
j \
-4-3-2-101234χ
9        11
7       1 -1
5      21 1
3     21  -1
1    32   1
-1   23    1
-3  12     -1
-5 12      1
-7 1       -1
-91        1
Integral Khovanov Homology

(db, data source)

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

Back to the top.

8_8

8_10

Personal tools