L9a26

L9a25

L9a27

(Knotscape image)	See the full Thistlethwaite Link Table (up to 11 crossings). Visit L9a26 at Knotilus!
	L9a26 is $9^2_{11}$ in the Rolfsen table of links.

Link Presentations

[edit Notes on L9a26's Link Presentations]

Planar diagram presentation	X8192 X10,4,11,3 X18,10,7,9 X14,6,15,5 X16,14,17,13 X12,18,13,17 X2738 X4,12,5,11 X6,16,1,15
Gauss code	{1, -7, 2, -8, 4, -9}, {7, -1, 3, -2, 8, -6, 5, -4, 9, -5, 6, -3}

A Braid Representative
A Morse Link Presentation

Polynomial invariants

Multivariable Alexander Polynomial (in $u$, $v$, $w$, ...)	$-\frac{2 u^2 v^2-3 u^2 v+u^2-3 u v^2+5 u v-3 u+v^2-3 v+2}{u v}$ (db)
Jones polynomial	$8 q^{9/2}-8 q^{7/2}+6 q^{5/2}-5 q^{3/2}+q^{17/2}-3 q^{15/2}+5 q^{13/2}-7 q^{11/2}+2 \sqrt{q}-\frac{1}{\sqrt{q}}$ (db)
Signature	3 (db)
HOMFLY-PT polynomial	$z^3 a^{-7} +z a^{-7} -z^5 a^{-5} -2 z^3 a^{-5} -z a^{-5} -z^5 a^{-3} -2 z^3 a^{-3} -z a^{-3} - a^{-3} z^{-1} +z^3 a^{-1} +2 z a^{-1} + a^{-1} z^{-1}$ (db)
Kauffman polynomial	$z^4 a^{-10} -z^2 a^{-10} +3 z^5 a^{-9} -4 z^3 a^{-9} +z a^{-9} +4 z^6 a^{-8} -5 z^4 a^{-8} +2 z^2 a^{-8} +3 z^7 a^{-7} -z^5 a^{-7} -2 z^3 a^{-7} +z a^{-7} +z^8 a^{-6} +5 z^6 a^{-6} -9 z^4 a^{-6} +4 z^2 a^{-6} +5 z^7 a^{-5} -6 z^5 a^{-5} +z a^{-5} +z^8 a^{-4} +3 z^6 a^{-4} -7 z^4 a^{-4} +2 z^2 a^{-4} +2 z^7 a^{-3} -z^5 a^{-3} -5 z^3 a^{-3} +4 z a^{-3} - a^{-3} z^{-1} +2 z^6 a^{-2} -4 z^4 a^{-2} +z^2 a^{-2} + a^{-2} +z^5 a^{-1} -3 z^3 a^{-1} +3 z a^{-1} - a^{-1} z^{-1}$ (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   \ -2 -1 0 1 2 3 4 5 6 7 χ 18                   1 -1 16                 2   2 14               3 1   -2 12             4 2     2 10           4 3       -1 8         4 4         0 6       3 5           2 4     2 3             -1 2   1 4               3 0   1                 -1 -2 1                   1

Integral Khovanov Homology (db, data source)

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

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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