7 7

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7_6

8_1

Contents

Image:7 7.gif
(KnotPlot image)

See the full Rolfsen Knot Table.

Visit 7 7's page at the Knot Server (KnotPlot driven, includes 3D interactive images!)

Visit 7_7's page at Knotilus!

Visit 7 7's page at the original Knot Atlas!


[edit] Knot presentations

Planar diagram presentation X1425 X5,10,6,11 X3948 X9,3,10,2 X11,14,12,1 X7,13,8,12 X13,7,14,6
Gauss code -1, 4, -3, 1, -2, 7, -6, 3, -4, 2, -5, 6, -7, 5
Dowker-Thistlethwaite code 4 8 10 12 2 14 6
Conway Notation [21112]


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

Length is 7, width is 4,

Braid index is 4

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

[edit Notes on presentations of 7 7]

Knot 7_7.
Knot 7_7.
A graph, knot 7_7.
A graph, knot 7_7.

[edit] Three dimensional invariants

Symmetry type Reversible
Unknotting number 1
3-genus 2
Bridge index 2
Super bridge index 4
Nakanishi index 1
Maximal Thurston-Bennequin number [-4][-5]
Hyperbolic Volume 7.64338
A-Polynomial See Data:7 7/A-polynomial

[edit Notes for 7 7'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 7 7's four dimensional invariants]

[edit] Polynomial invariants

Alexander polynomial t2−5t + 9−5t−1 + t−2
Conway polynomial z4z2 + 1
2nd Alexander ideal (db, data sources) {1}
Determinant and Signature { 21, 0 }
Jones polynomial q4−2q3 + 3q2−4q + 4−3q−1 + 3q−2q−3
HOMFLY-PT polynomial (db, data sources) z4a2z2−2z2a−2 + 2z2−2a−2 + a−4 + 2
Kauffman polynomial (db, data sources) z6a−2 + z6 + 3az5 + 5z5a−1 + 2z5a−3 + 3a2z4 + 2z4a−2 + z4a−4 + 4z4 + a3z3−3az3−8z3a−1−4z3a−3−3a2z2−6z2a−2−2z2a−4−7z2 + az + 3za−1 + 2za−3 + 2a−2 + a−4 + 2
The A2 invariant q10 + q8 + q6 + 2q2 + q−2q−4q−6q−10 + q−12 + q−14
The G2 invariant q52−2q50 + 3q48−4q46 + q42−4q40 + 9q38−9q36 + 9q34−3q32−4q30 + 9q28−10q26 + 9q24−5q22q20 + 5q18−4q16 + 4q14 + 2q12−7q10 + 10q8−5q6−2q4 + 8q2−12 + 17q−2−11q−4 + 5q−6 + 3q−8−9q−10 + 15q−12−14q−14 + 6q−16q−18−4q−20 + 6q−22−6q−24 + q−26 + 3q−28−7q−30 + 5q−32−4q−34−5q−36 + 10q−38−11q−40 + 9q−42−4q−44q−46 + 7q−48−8q−50 + 9q−52−4q−54 + q−56 + q−58−3q−60 + 3q−62q−64 + q−66

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

Same Alexander/Conway Polynomial: {K11n28,}

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 7 7. Nonzero entries off the critical diagonals (if any exist) are highlighted in red.   
\ r
  \  
j \
-3-2-101234χ
9       11
7      1 -1
5     21 1
3    21  -1
1   22   0
-1  23    1
-3 11     0
-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}\oplus{\mathbb Z}_2^{2} {\mathbb Z}^{2}
r = 0 {\mathbb Z}^{3}\oplus{\mathbb Z}_2 {\mathbb Z}^{2}
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.

7_6

8_1

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