L9n13

L9n12

L9n14

(Knotscape image)	See the full Thistlethwaite Link Table (up to 11 crossings). Visit L9n13 at Knotilus!
	L9n13 is $9^2_{54}$ in the Rolfsen table of links.

Link Presentations

[edit Notes on L9n13's Link Presentations]

Planar diagram presentation	X8192 X11,17,12,16 X3,10,4,11 X15,3,16,2 X5,13,6,12 X6718 X9,14,10,15 X13,18,14,7 X17,4,18,5
Gauss code	{1, 4, -3, 9, -5, -6}, {6, -1, -7, 3, -2, 5, -8, 7, -4, 2, -9, 8}

A Braid Representative
A Morse Link Presentation

Polynomial invariants

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

Integral Khovanov Homology (db, data source)

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

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.

L9n12 L9n14