L11n286

L11n285

L11n287

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Link Presentations

[edit Notes on L11n286's Link Presentations]

Planar diagram presentation	X6172 X5,12,6,13 X3849 X2,14,3,13 X14,7,15,8 X15,1,16,4 X21,18,22,19 X9,21,10,20 X19,5,20,10 X11,16,12,17 X17,22,18,11
Gauss code	{1, -4, -3, 6}, {-2, -1, 5, 3, -8, 9}, {-10, 2, 4, -5, -6, 10, -11, 7, -9, 8, -7, 11}

A Braid Representative
A Morse Link Presentation

Polynomial invariants

Multivariable Alexander Polynomial (in $u$, $v$, $w$, ...)	$\frac{2 u v w^2-3 u v w-2 u w^2+2 u w-2 v^2 w+2 v^2+3 v w-2 v}{\sqrt{u} v w}$ (db)
Jones polynomial	$- q^{-7} +2 q^{-6} -3 q^{-5} +5 q^{-4} -5 q^{-3} +2 q^2+6 q^{-2} -2 q-5 q^{-1} +5$ (db)
Signature	0 (db)
HOMFLY-PT polynomial	$-z^2 a^6-a^6+z^4 a^4+2 z^2 a^4+2 a^4+z^4 a^2+z^2 a^2+a^2 z^{-2} +a^2-3 z^2-2 z^{-2} -4+ a^{-2} z^{-2} +2 a^{-2}$ (db)
Kauffman polynomial	$a^5 z^9+a^3 z^9+2 a^6 z^8+4 a^4 z^8+2 a^2 z^8+a^7 z^7-2 a^5 z^7-a^3 z^7+2 a z^7-10 a^6 z^6-17 a^4 z^6-5 a^2 z^6+2 z^6-5 a^7 z^5-5 a^5 z^5-4 a^3 z^5-3 a z^5+z^5 a^{-1} +15 a^6 z^4+23 a^4 z^4+3 a^2 z^4-5 z^4+7 a^7 z^3+10 a^5 z^3+2 a^3 z^3-2 a z^3-z^3 a^{-1} -8 a^6 z^2-16 a^4 z^2-a^2 z^2+3 z^2 a^{-2} +10 z^2-2 a^7 z-4 a^5 z+6 a z+4 z a^{-1} +2 a^6+4 a^4-2 a^2-4 a^{-2} -7-2 a z^{-1} -2 a^{-1} z^{-1} +a^2 z^{-2} + a^{-2} z^{-2} +2 z^{-2}$ (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   \ -7 -6 -5 -4 -3 -2 -1 0 1 2 χ 5                   2 2 3                 1 1 0 1               4 1   3 -1             3 3     0 -3           3 2       1 -5         3 4         1 -7       2 2           0 -9     1 3             2 -11   1 2               -1 -13   1                 1 -15 1                   -1

Integral Khovanov Homology (db, data source)

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

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). Back to the top.

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