L9a55

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	[edit L9a55 Quick Notes] L9a55 is $9_{1}^{4}$ in the Rolfsen table of links.

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Link Presentations

[edit Notes on L9a55's Link Presentations]

Planar diagram presentation	X₆₁₇₂ X₂₅₃₆ X_16,12,17,11 X_10,3,11,4 X_4,9,1,10 X_14,7,15,8 X_8,13,5,14 X_18,16,13,15 X_12,18,9,17
Gauss code	{1, -2, 4, -5}, {2, -1, 6, -7}, {5, -4, 3, -9}, {7, -6, 8, -3, 9, -8}

A Braid Representative

A Morse Link Presentation

Polynomial invariants

Multivariable Alexander Polynomial (in $u$ , $v$ , $w$ , ...)	$-{\frac {2t(2)t(1)-t(2)t(3)t(1)+t(3)t(1)-t(2)t(4)t(1)+t(2)t(3)t(4)t(1)-2t(3)t(4)t(1)+2t(4)t(1)-2t(1)-2t(2)+2t(2)t(3)-t(3)+t(2)t(4)-2t(2)t(3)t(4)+2t(3)t(4)-t(4)+1}{{\sqrt {t(1)}}{\sqrt {t(2)}}{\sqrt {t(3)}}{\sqrt {t(4)}}}}$ (db)
Jones polynomial	$q^{5/2}-4q^{3/2}+6{\sqrt {q}}-{\frac {8}{\sqrt {q}}}+{\frac {7}{q^{3/2}}}-{\frac {10}{q^{5/2}}}+{\frac {5}{q^{7/2}}}-{\frac {5}{q^{9/2}}}+{\frac {1}{q^{11/2}}}-{\frac {1}{q^{13/2}}}$ (db)
Signature	-1 (db)
HOMFLY-PT polynomial	Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle a^7 z^{-1} +a^7 z^{-3} -3 z a^5-5 a^5 z^{-1} -3 a^5 z^{-3} +3 z^3 a^3+6 z a^3+7 a^3 z^{-1} +3 a^3 z^{-3} -z^5 a-2 z^3 a-3 z a-3 a z^{-1} -a z^{-3} +z^3 a^{-1} } (db)
Kauffman polynomial	Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle -a^4 z^8-a^2 z^8-a^5 z^7-5 a^3 z^7-4 a z^7-a^6 z^6-a^4 z^6-6 a^2 z^6-6 z^6-a^7 z^5-3 a^5 z^5+4 a^3 z^5+2 a z^5-4 z^5 a^{-1} -2 a^4 z^4+7 a^2 z^4-z^4 a^{-2} +8 z^4+4 a^7 z^3+12 a^5 z^3+8 a^3 z^3+4 a z^3+4 z^3 a^{-1} +6 a^6 z^2+12 a^4 z^2+6 a^2 z^2-6 a^7 z-14 a^5 z-14 a^3 z-6 a z-8 a^6-15 a^4-8 a^2+4 a^7 z^{-1} +9 a^5 z^{-1} +9 a^3 z^{-1} +4 a z^{-1} +3 a^6 z^{-2} +6 a^4 z^{-2} +3 a^2 z^{-2} -a^7 z^{-3} -3 a^5 z^{-3} -3 a^3 z^{-3} -a z^{-3} } (db)

Khovanov Homology

The coefficients of the monomials Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle t^rq^j} are shown, along with their alternating sums Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle \chi} (fixed Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle j} , alternation over

r

).

\		r
	\
j		\

-6

-5

-4

-3

-2

-1

0

1

2

3

χ

6

1

-1

4

3

2

3

1

-2

0

5

3

2

-2

6

7

1

-4

4

1

3

-6

1

6

5

-8

4

0

-10

1

5

4

-12

0

-14

1

Integral Khovanov Homology

(db, data source)

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