L9n18

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L9n17.gif

L9n17

L9n19.gif

L9n19

Contents

L9n18.gif
(Knotscape image)
See the full Thistlethwaite Link Table (up to 11 crossings).

Visit L9n18 at Knotilus!

L9n18 is 9^2_{53} in the Rolfsen table of links.


Link Presentations

[edit Notes on L9n18's Link Presentations]

Planar diagram presentation X10,1,11,2 X2,11,3,12 X12,3,13,4 X18,5,9,6 X7,14,8,15 X13,16,14,17 X15,8,16,1 X6,9,7,10 X4,17,5,18
Gauss code {1, -2, 3, -9, 4, -8, -5, 7}, {8, -1, 2, -3, -6, 5, -7, 6, 9, -4}
A Braid Representative
BraidPart3.gifBraidPart0.gifBraidPart0.gifBraidPart0.gifBraidPart3.gifBraidPart0.gifBraidPart0.gifBraidPart0.gifBraidPart3.gif
BraidPart4.gifBraidPart3.gifBraidPart3.gifBraidPart3.gifBraidPart4.gifBraidPart3.gifBraidPart3.gifBraidPart3.gifBraidPart4.gif
BraidPart0.gifBraidPart4.gifBraidPart4.gifBraidPart4.gifBraidPart0.gifBraidPart4.gifBraidPart4.gifBraidPart4.gifBraidPart0.gif
A Morse Link Presentation L9n18 ML.gif

Polynomial invariants

Multivariable Alexander Polynomial (in u, v, w, ...) -\frac{\left(t(2) t(1)^2+1\right) \left(t(1) t(2)^2+1\right)}{t(1)^{3/2} t(2)^{3/2}} (db)
Jones polynomial -\frac{1}{q^{7/2}}-\frac{1}{q^{11/2}}+\frac{1}{q^{15/2}}-\frac{1}{q^{21/2}} (db)
Signature -6 (db)
HOMFLY-PT polynomial a^{11} (-z)+a^9 z^5+6 a^9 z^3+8 a^9 z+a^9 z^{-1} -a^7 z^7-7 a^7 z^5-15 a^7 z^3-11 a^7 z-a^7 z^{-1} (db)
Kauffman polynomial -z^3 a^{13}+3 z a^{13}+z a^{11}-z^6 a^{10}+6 z^4 a^{10}-8 z^2 a^{10}-z^7 a^9+7 z^5 a^9-14 z^3 a^9+9 z a^9-a^9 z^{-1} -z^6 a^8+6 z^4 a^8-8 z^2 a^8+a^8-z^7 a^7+7 z^5 a^7-15 z^3 a^7+11 z a^7-a^7 z^{-1} (db)

Khovanov Homology

The coefficients of the monomials t^rq^j are shown, along with their alternating sums \chi (fixed j, alternation over r).   
\ r
  \  
j \
-8-7-6-5-4-3-2-10χ
-6        11
-8        11
-10      1  1
-12    1    1
-14   111   -1
-16   1     -1
-18  11     0
-201        1
-221        1
Integral Khovanov Homology

(db, data source)

  
\dim{\mathcal G}_{2r+i}\operatorname{KH}^r_{\mathbb Z} i=-8 i=-6 i=-4
r=-8 {\mathbb Z} {\mathbb Z}
r=-7
r=-6 {\mathbb Z}
r=-5 {\mathbb Z} {\mathbb Z}\oplus{\mathbb Z}_2 {\mathbb Z}
r=-4 {\mathbb Z} {\mathbb Z}
r=-3 {\mathbb Z}
r=-2 {\mathbb Z}_2 {\mathbb Z}
r=-1
r=0 {\mathbb Z} {\mathbb Z}

Computer Talk

Much of the above data can be recomputed by Mathematica using the package KnotTheory`. See A Sample KnotTheory` Session.

Modifying This Page

Read me first: Modifying Knot Pages

See/edit the Link Page master template (intermediate).

See/edit the Link_Splice_Base (expert).

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L9n17.gif

L9n17

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L9n19