9 49

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9_48

10_1

Contents

Image:9 49.gif
(KnotPlot image)

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Visit 9_49's page at Knotilus!

Visit 9 49's page at the original Knot Atlas!


[edit] Knot presentations

Planar diagram presentation X6271 X12,8,13,7 X5,15,6,14 X3,11,4,10 X11,3,12,2 X15,5,16,4 X17,9,18,8 X9,17,10,16 X18,14,1,13
Gauss code 1, 5, -4, 6, -3, -1, 2, 7, -8, 4, -5, -2, 9, 3, -6, 8, -7, -9
Dowker-Thistlethwaite code 6 -10 -14 12 -16 -2 18 -4 -8
Conway Notation [-20:-20:-20]


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

Length is 11, width is 4,

Braid index is 4

Image:9 49_ML.gif Image:9 49_AP.gif
[{2, 7}, {1, 5}, {8, 3}, {7, 9}, {6, 2}, {4, 1}, {5, 8}, {3, 6}, {9, 4}]

[edit Notes on presentations of 9 49]


[edit] Three dimensional invariants

Symmetry type Reversible
Unknotting number 3
3-genus 2
Bridge index 3
Super bridge index {4,5}
Nakanishi index 2
Maximal Thurston-Bennequin number [3][-12]
Hyperbolic Volume 9.42707
A-Polynomial See Data:9 49/A-polynomial

[edit Notes for 9 49's three dimensional invariants]

[edit] Four dimensional invariants

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

[edit Notes for 9 49's four dimensional invariants]

[edit] Polynomial invariants

Alexander polynomial 3t2−6t + 7−6t−1 + 3t−2
Conway polynomial 3z4 + 6z2 + 1
2nd Alexander ideal (db, data sources) {5,t + 1}
Determinant and Signature { 25, 4 }
Jones polynomial −2q9 + 3q8−4q7 + 5q6−4q5 + 4q4−2q3 + q2
HOMFLY-PT polynomial (db, data sources) z4a−4 + 2z4a−6 + 2z2a−4 + 6z2a−6−2z2a−8 + 4a−6−3a−8
Kauffman polynomial (db, data sources) z7a−7 + z7a−9 + 3z6a−6 + 4z6a−8 + z6a−10 + 2z5a−5 + z5a−7z5a−9 + z4a−4−8z4a−6−9z4a−8−3z3a−5−3z3a−7 + 3z3a−9 + 3z3a−11−2z2a−4 + 9z2a−6 + 10z2a−8z2a−10 + 2za−7−2za−9−4za−11−4a−6−3a−8
The A2 invariant q−6q−8 + q−10 + q−14 + 3q−16 + q−18 + 2q−20q−22q−24q−26−2q−28
The G2 invariant q−30q−32 + 2q−34−3q−36 + 2q−38q−40−2q−42 + 8q−44−10q−46 + 12q−48−7q−50q−52 + 10q−54−16q−56 + 19q−58−11q−60 + q−62 + 10q−64−14q−66 + 13q−68−2q−70−6q−72 + 14q−74−12q−76 + 4q−78 + 9q−80−15q−82 + 21q−84−16q−86 + 9q−88 + 5q−90−13q−92 + 22q−94−22q−96 + 16q−98−4q−100−7q−102 + 13q−104−16q−106 + 9q−108q−110−10q−112 + 10q−114−11q−116−2q−118 + 10q−120−20q−122 + 16q−124−9q−126−4q−128 + 11q−130−16q−132 + 15q−134−7q−136 + q−138 + 3q−140−7q−142 + 7q−144−2q−146 + q−148 + q−150

[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: (6, 14)
V2,1 through V6,9:
V2,1 V3,1 V4,1 V4,2 V4,3 V5,1 V5,2 V5,3 V5,4 V6,1 V6,2 V6,3 V6,4 V6,5 V6,6 V6,7 V6,8 V6,9
24 112 288 700 116 2688 \frac{14368}{3} \frac{2560}{3} 688 2304 6272 16800 2784 \frac{166191}{5} \frac{1876}{5} \frac{207244}{15} \frac{689}{3} \frac{9391}{5}

V2,1 through V6,9 were provided by Petr Dunin-Barkowski <barkovs@itep.ru>, Andrey Smirnov <asmirnov@itep.ru>, and Alexei Sleptsov <sleptsov@itep.ru> and uploaded on October 2010 by User:Drorbn. Note that they are normalized differently than V2 and V3.

[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 = 4 is the signature of 9 49. Nonzero entries off the critical diagonals (if any exist) are highlighted in red.   
\ r
  \  
j \
01234567χ
19       2-2
17      1 1
15     32 -1
13    21  1
11   23   1
9  22    0
7  2     2
512      -1
31       1
Integral Khovanov Homology

(db, data source)

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

[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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