L10n40

L10n39

L10n41

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Link Presentations

[edit Notes on L10n40's Link Presentations]

Planar diagram presentation	X8192 X10,4,11,3 X20,10,7,9 X2738 X15,5,16,4 X5,13,6,12 X11,16,12,17 X6,18,1,17 X14,19,15,20 X18,13,19,14
Gauss code	{1, -4, 2, 5, -6, -8}, {4, -1, 3, -2, -7, 6, 10, -9, -5, 7, 8, -10, 9, -3}

A Braid Representative
A Morse Link Presentation

Polynomial invariants

Multivariable Alexander Polynomial (in $u$, $v$, $w$, ...)	$-\frac{t(1) t(2)^4-t(2)^4-2 t(1) t(2)^3+t(2)^3+t(1) t(2)^2+t(1)^2 t(2)-2 t(1) t(2)-t(1)^2+t(1)}{t(1) t(2)^2}$ (db)
Jones polynomial	$q^{9/2}-2 q^{7/2}+\frac{1}{q^{7/2}}+2 q^{5/2}-\frac{2}{q^{5/2}}-4 q^{3/2}+\frac{3}{q^{3/2}}+3 \sqrt{q}-\frac{4}{\sqrt{q}}$ (db)
Signature	-1 (db)
HOMFLY-PT polynomial	$z^3 a^{-3} -a^3 z+2 z a^{-3} -a^3 z^{-1} -z^5 a^{-1} +2 a z^3-4 z^3 a^{-1} +5 a z-5 z a^{-1} +3 a z^{-1} -2 a^{-1} z^{-1}$ (db)
Kauffman polynomial	$z^6 a^{-4} -4 z^4 a^{-4} +a^4 z^2+3 z^2 a^{-4} -a^4+2 z^7 a^{-3} -9 z^5 a^{-3} +2 a^3 z^3+11 z^3 a^{-3} -2 a^3 z-5 z a^{-3} +a^3 z^{-1} +z^8 a^{-2} +a^2 z^6-2 z^6 a^{-2} -3 a^2 z^4-4 z^4 a^{-2} +6 a^2 z^2+5 z^2 a^{-2} -3 a^2+2 a z^7+4 z^7 a^{-1} -9 a z^5-18 z^5 a^{-1} +16 a z^3+25 z^3 a^{-1} -11 a z-14 z a^{-1} +3 a z^{-1} +2 a^{-1} z^{-1} +z^8-2 z^6-3 z^4+7 z^2-3$ (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   \ -3 -2 -1 0 1 2 3 4 5 χ 10                 1 -1 8               1   1 6             1 1   0 4           3 1     2 2         1 2       1 0       3 2         1 -2     1 2           1 -4   1 2             -1 -6   1               1 -8 1                 -1

Integral Khovanov Homology (db, data source)

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

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). Back to the top.

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