L10n48

L10n47

L10n49

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Link Presentations

[edit Notes on L10n48's Link Presentations]

Planar diagram presentation	X8192 X18,9,19,10 X6718 X20,14,7,13 X12,5,13,6 X3,10,4,11 X15,5,16,4 X11,16,12,17 X14,20,15,19 X2,18,3,17
Gauss code	{1, -10, -6, 7, 5, -3}, {3, -1, 2, 6, -8, -5, 4, -9, -7, 8, 10, -2, 9, -4}

A Braid Representative
A Morse Link Presentation

Polynomial invariants

Multivariable Alexander Polynomial (in $u$, $v$, $w$, ...)	$-\frac{u^2 v^2-u^2 v-2 u v^2+5 u v-2 u-v+1}{u v}$ (db)
Jones polynomial	$-q^{3/2}+2 \sqrt{q}-\frac{4}{\sqrt{q}}+\frac{4}{q^{3/2}}-\frac{5}{q^{5/2}}+\frac{4}{q^{7/2}}-\frac{3}{q^{9/2}}+\frac{2}{q^{11/2}}-\frac{1}{q^{13/2}}$ (db)
Signature	-1 (db)
HOMFLY-PT polynomial	$z^3 a^5+2 z a^5+a^5 z^{-1} -z^5 a^3-4 z^3 a^3-6 z a^3-2 a^3 z^{-1} +2 z^3 a+4 z a+2 a z^{-1} -z a^{-1} - a^{-1} z^{-1}$ (db)
Kauffman polynomial	$-a^4 z^8-a^2 z^8-2 a^5 z^7-3 a^3 z^7-a z^7-2 a^6 z^6+2 a^4 z^6+4 a^2 z^6-a^7 z^5+6 a^5 z^5+11 a^3 z^5+4 a z^5+6 a^6 z^4-a^4 z^4-9 a^2 z^4-2 z^4+3 a^7 z^3-5 a^5 z^3-18 a^3 z^3-11 a z^3-z^3 a^{-1} -3 a^6 z^2+5 a^2 z^2+2 z^2-a^7 z+3 a^5 z+11 a^3 z+9 a z+2 z a^{-1} -a^2-a^5 z^{-1} -2 a^3 z^{-1} -2 a z^{-1} - a^{-1} z^{-1}$ (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   \ -6 -5 -4 -3 -2 -1 0 1 2 χ 4                 1 1 2               1   -1 0             3 1   2 -2           2 2     0 -4         3 2       1 -6       2 3         1 -8     1 2           -1 -10   1 2             1 -12   1               -1 -14 1                 1

Integral Khovanov Homology (db, data source)

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

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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