L9a30

(Knotscape image)

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

Visit L9a30's page at the original Knot Atlas.

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

A Braid Representative

A Morse Link Presentation

Multivariable Alexander Polynomial (in $u$ , $v$ , $w$ , ...)	$-2 v 2 u 2 + 2 v u 2 + 2 v 2 u -3 v u + 2 u + 2 v -2$ (db)
Jones polynomial	$-\sqrt{q}+\frac{1}{\sqrt{q}}-\frac{3}{q^{3/2}}+\frac{4}{q^{5/2}}-\frac{5}{q^{7/2}}+\frac{5}{q^{9/2}}-\frac{5}{q^{11/2}}+\frac{3}{q^{13/2}}-\frac{2}{q^{15/2}}+\frac{1}{q^{17/2}}$ (db)
Signature	-3 (db)
HOMFLY-PT polynomial	$- z 3 a 7 -2 z a 7 + z 5 a 5 + 3 z 3 a 5 + 2 z a 5 + z 5 a 3 + 3 z 3 a 3 + 2 z a 3 + a 3 z -1 - z 3 a -3 z a - a z -1$ (db)
Kauffman polynomial	$- z 4 a 10 + 2 z 2 a 10 -2 z 5 a 9 + 4 z 3 a 9 - z a 9 -2 z 6 a 8 + 3 z 4 a 8 - z 2 a 8 -2 z 7 a 7 + 5 z 5 a 7 -7 z 3 a 7 + 2 z a 7 - z 8 a 6 + 2 z 6 a 6 -4 z 4 a 6 + z 2 a 6 -3 z 7 a 5 + 9 z 5 a 5 -12 z 3 a 5 + 4 z a 5 - z 8 a 4 + 3 z 6 a 4 -6 z 4 a 4 + 5 z 2 a 4 - z 7 a 3 + z 5 a 3 + 3 z 3 a 3 -3 z a 3 + a 3 z -1 - z 6 a 2 + 2 z 4 a 2 + z 2 a 2 - a 2 - z 5 a + 4 z 3 a -4 z a + a z -1$ (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 L9a30. Nonzero entries off the critical diagonals (if any exist) are highlighted in red.

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