L9a28

(Knotscape image)

See the full Thistlethwaite Link Table (up to 11 crossings).

Visit L9a28's page at the original Knot Atlas.

Planar diagram presentation	X₈₁₉₂ X_2,9,3,10 X_10,3,11,4 X_14,5,15,6 X_18,16,7,15 X_16,12,17,11 X_12,18,13,17 X₆₇₁₈ X_4,13,5,14
Gauss code	{1, -2, 3, -9, 4, -8}, {8, -1, 2, -3, 6, -7, 9, -4, 5, -6, 7, -5}

A Braid Representative

A Morse Link Presentation

Multivariable Alexander Polynomial (in $u$ , $v$ , $w$ , ...)	$- v 2 u 4 + 2 v 2 u 3 -2 v u 3 -2 v 2 u 2 + 3 v u 2 -2 u 2 -2 v u + 2 u -1$ (db)
Jones polynomial	$q^{3/2}-2 \sqrt{q}+\frac{3}{\sqrt{q}}-\frac{5}{q^{3/2}}+\frac{5}{q^{5/2}}-\frac{6}{q^{7/2}}+\frac{5}{q^{9/2}}-\frac{4}{q^{11/2}}+\frac{2}{q^{13/2}}-\frac{1}{q^{15/2}}$ (db)
Signature	-3 (db)
HOMFLY-PT polynomial	$- a 3 z 7 + a 5 z 5 -6 a 3 z 5 + a z 5 + 4 a 5 z 3 -13 a 3 z 3 + 4 a z 3 + 5 a 5 z -12 a 3 z + 4 a z + 2 a 5 z -1 -3 a 3 z -1 + a z -1$ (db)
Kauffman polynomial	$- z 3 a 9 + z a 9 -2 z 4 a 8 + z 2 a 8 -3 z 5 a 7 + 3 z 3 a 7 -2 z a 7 -3 z 6 a 6 + 3 z 4 a 6 - z 2 a 6 -3 z 7 a 5 + 7 z 5 a 5 -9 z 3 a 5 + 7 z a 5 -2 a 5 z -1 - z 8 a 4 -2 z 6 a 4 + 11 z 4 a 4 -10 z 2 a 4 + 3 a 4 -5 z 7 a 3 + 18 z 5 a 3 -22 z 3 a 3 + 14 z a 3 -3 a 3 z -1 - z 8 a 2 + 10 z 4 a 2 -12 z 2 a 2 + 3 a 2 -2 z 7 a + 8 z 5 a -9 z 3 a + 4 z a - a z -1 - z 6 + 4 z 4 -4 z 2 + 1$ (db)

The coefficients of the monomials

t r q j

are shown, along with their alternating sums

χ

(fixed

j

, alternation over

r

). The squares with yellow highlighting are those on the "critical diagonals", where

j -2 r = s + 1

j -2 r = s -1

, where

s =

-3 is the signature of L9a28. Nonzero entries off the critical diagonals (if any exist) are highlighted in red.

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