L9n28

L9n27

L10a1

(Knotscape image)	See the full Thistlethwaite Link Table (up to 11 crossings). Visit L9n28 at Knotilus!
	L9n28 is $9^3_{20}$ in the Rolfsen table of links.

Link Presentations

[edit Notes on L9n28's Link Presentations]

Planar diagram presentation	X6172 X12,7,13,8 X4,13,1,14 X18,10,15,9 X8493 X5,17,6,16 X17,5,18,14 X10,16,11,15 X2,12,3,11
Gauss code	{1, -9, 5, -3}, {8, 6, -7, -4}, {-6, -1, 2, -5, 4, -8, 9, -2, 3, 7}

A Braid Representative
A Morse Link Presentation

Polynomial invariants

Multivariable Alexander Polynomial (in $u$, $v$, $w$, ...)	$\frac{(u-1) (w-1)^2 (v w+1)}{\sqrt{u} \sqrt{v} w^{3/2}}$ (db)
Jones polynomial	$3 q^5-4 q^4+6 q^3-5 q^2+6 q-4+3 q^{-1} - q^{-2}$ (db)
Signature	2 (db)
HOMFLY-PT polynomial	$z^6 a^{-2} +4 z^4 a^{-2} -z^4 a^{-4} -z^4+5 z^2 a^{-2} -3 z^2 a^{-4} -2 z^2+3 a^{-2} -4 a^{-4} + a^{-6} + a^{-2} z^{-2} -2 a^{-4} z^{-2} + a^{-6} z^{-2}$ (db)
Kauffman polynomial	$2 z^7 a^{-1} +2 z^7 a^{-3} +8 z^6 a^{-2} +5 z^6 a^{-4} +3 z^6+a z^5-z^5 a^{-1} +z^5 a^{-3} +3 z^5 a^{-5} -21 z^4 a^{-2} -13 z^4 a^{-4} -8 z^4-2 a z^3-7 z^3 a^{-1} -8 z^3 a^{-3} -3 z^3 a^{-5} +17 z^2 a^{-2} +18 z^2 a^{-4} +6 z^2 a^{-6} +5 z^2+a z+3 z a^{-1} +7 z a^{-3} +5 z a^{-5} -7 a^{-2} -10 a^{-4} -5 a^{-6} -1-2 a^{-3} z^{-1} -2 a^{-5} z^{-1} + a^{-2} z^{-2} +2 a^{-4} z^{-2} + a^{-6} z^{-2}$ (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   \ -3 -2 -1 0 1 2 3 4 χ 11               3 3 9             3 2 -1 7           3 1   2 5         2 3     1 3       4 3       1 1     2 4         2 -1   1 2           -1 -3   2             2 -5 1               -1

Integral Khovanov Homology (db, data source)

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

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.

L9n27 L10a1