8 3

Polynomial invariants

Alexander polynomial	[math]\displaystyle{ -4 t+9-4 t^{-1} }[/math]
Conway polynomial	[math]\displaystyle{ 1-4 z^2 }[/math]
2nd Alexander ideal (db, data sources)	[math]\displaystyle{ \{1\} }[/math]
Determinant and Signature	{ 17, 0 }
Jones polynomial	[math]\displaystyle{ q^4-q^3+2 q^2-3 q+3-3 q^{-1} +2 q^{-2} - q^{-3} + q^{-4} }[/math]
HOMFLY-PT polynomial (db, data sources)	[math]\displaystyle{ a^4-z^2 a^2-2 z^2-1-z^2 a^{-2} + a^{-4} }[/math]
Kauffman polynomial (db, data sources)	[math]\displaystyle{ a z^7+z^7 a^{-1} +a^2 z^6+z^6 a^{-2} +2 z^6+a^3 z^5-4 a z^5-4 z^5 a^{-1} +z^5 a^{-3} +a^4 z^4-2 a^2 z^4-2 z^4 a^{-2} +z^4 a^{-4} -6 z^4-2 a^3 z^3+8 a z^3+8 z^3 a^{-1} -2 z^3 a^{-3} -3 a^4 z^2+a^2 z^2+z^2 a^{-2} -3 z^2 a^{-4} +8 z^2-4 a z-4 z a^{-1} +a^4+ a^{-4} -1 }[/math]
The A2 invariant	[math]\displaystyle{ q^{14}+q^{12}+q^8-q^4-1- q^{-4} + q^{-8} + q^{-12} + q^{-14} }[/math]
The G2 invariant	[math]\displaystyle{ q^{66}+q^{62}-q^{60}+q^{58}+q^{56}-q^{54}+2 q^{52}-q^{50}+2 q^{48}-q^{46}+q^{42}-2 q^{40}+4 q^{38}-3 q^{36}+q^{34}+q^{32}-2 q^{30}+3 q^{28}-2 q^{26}+q^{24}+2 q^{22}-2 q^{20}+q^{18}-2 q^{14}+4 q^{12}-4 q^{10}+q^8-3 q^4+3 q^2-5+3 q^{-2} -3 q^{-4} + q^{-8} -4 q^{-10} +4 q^{-12} -2 q^{-14} + q^{-18} -2 q^{-20} +2 q^{-22} + q^{-24} -2 q^{-26} +3 q^{-28} -2 q^{-30} + q^{-32} + q^{-34} -3 q^{-36} +4 q^{-38} -2 q^{-40} + q^{-42} - q^{-46} +2 q^{-48} - q^{-50} +2 q^{-52} - q^{-54} + q^{-56} + q^{-58} - q^{-60} + q^{-62} + q^{-66} }[/math]

Further Quantum Invariants

Further quantum knot invariants for 8_3.

A1 Invariants.

Weight	Invariant
1	[math]\displaystyle{ q^9+q^5-q^3- q^{-3} + q^{-5} + q^{-9} }[/math]
2	[math]\displaystyle{ q^{26}+q^{20}-q^{18}-2 q^{16}+q^{14}-2 q^{10}+2 q^8+q^6-q^4+q^2+1+ q^{-2} - q^{-4} + q^{-6} +2 q^{-8} -2 q^{-10} + q^{-14} -2 q^{-16} - q^{-18} + q^{-20} + q^{-26} }[/math]
3	[math]\displaystyle{ q^{51}-q^{41}-q^{39}+q^{35}-q^{33}-2 q^{31}+3 q^{27}+3 q^{25}-2 q^{23}-2 q^{21}+2 q^{19}+4 q^{17}-2 q^{15}-3 q^{13}+q^{11}+3 q^9-2 q^5-2 q^{-5} +3 q^{-9} + q^{-11} -3 q^{-13} -2 q^{-15} +4 q^{-17} +2 q^{-19} -2 q^{-21} -2 q^{-23} +3 q^{-25} +3 q^{-27} -2 q^{-31} - q^{-33} + q^{-35} - q^{-39} - q^{-41} + q^{-51} }[/math]
4	[math]\displaystyle{ q^{84}-q^{76}-q^{72}+q^{68}-q^{66}-2 q^{62}-q^{60}+3 q^{58}+2 q^{56}+3 q^{54}-2 q^{52}-3 q^{50}-q^{48}+q^{46}+7 q^{44}+2 q^{42}-3 q^{40}-6 q^{38}-5 q^{36}+6 q^{34}+6 q^{32}+q^{30}-6 q^{28}-9 q^{26}+4 q^{24}+6 q^{22}+3 q^{20}-3 q^{18}-7 q^{16}+q^{14}+3 q^{12}+3 q^{10}-2 q^6+q^4+q^2+1+ q^{-2} + q^{-4} -2 q^{-6} +3 q^{-10} +3 q^{-12} + q^{-14} -7 q^{-16} -3 q^{-18} +3 q^{-20} +6 q^{-22} +4 q^{-24} -9 q^{-26} -6 q^{-28} + q^{-30} +6 q^{-32} +6 q^{-34} -5 q^{-36} -6 q^{-38} -3 q^{-40} +2 q^{-42} +7 q^{-44} + q^{-46} - q^{-48} -3 q^{-50} -2 q^{-52} +3 q^{-54} +2 q^{-56} +3 q^{-58} - q^{-60} -2 q^{-62} - q^{-66} + q^{-68} - q^{-72} - q^{-76} + q^{-84} }[/math]
5	[math]\displaystyle{ q^{125}-q^{117}-q^{115}+q^{107}-2 q^{103}-q^{101}+q^{97}+3 q^{95}+3 q^{93}-3 q^{89}-3 q^{87}-2 q^{85}+3 q^{83}+5 q^{81}+5 q^{79}+q^{77}-5 q^{75}-8 q^{73}-6 q^{71}+8 q^{67}+10 q^{65}+5 q^{63}-6 q^{61}-14 q^{59}-11 q^{57}+12 q^{53}+16 q^{51}+7 q^{49}-11 q^{47}-18 q^{45}-10 q^{43}+6 q^{41}+18 q^{39}+16 q^{37}-3 q^{35}-15 q^{33}-12 q^{31}+11 q^{27}+12 q^{25}+2 q^{23}-7 q^{21}-8 q^{19}-2 q^{17}+4 q^{15}+4 q^{13}+2 q^{11}-q^9-3 q^7-3 q^{-7} - q^{-9} +2 q^{-11} +4 q^{-13} +4 q^{-15} -2 q^{-17} -8 q^{-19} -7 q^{-21} +2 q^{-23} +12 q^{-25} +11 q^{-27} -12 q^{-31} -15 q^{-33} -3 q^{-35} +16 q^{-37} +18 q^{-39} +6 q^{-41} -10 q^{-43} -18 q^{-45} -11 q^{-47} +7 q^{-49} +16 q^{-51} +12 q^{-53} -11 q^{-57} -14 q^{-59} -6 q^{-61} +5 q^{-63} +10 q^{-65} +8 q^{-67} -6 q^{-71} -8 q^{-73} -5 q^{-75} + q^{-77} +5 q^{-79} +5 q^{-81} +3 q^{-83} -2 q^{-85} -3 q^{-87} -3 q^{-89} +3 q^{-93} +3 q^{-95} + q^{-97} - q^{-101} -2 q^{-103} + q^{-107} - q^{-115} - q^{-117} + q^{-125} }[/math]

A2 Invariants.

Weight	Invariant
1,0	[math]\displaystyle{ q^{14}+q^{12}+q^8-q^4-1- q^{-4} + q^{-8} + q^{-12} + q^{-14} }[/math]
1,1	[math]\displaystyle{ q^{36}+2 q^{32}-2 q^{30}+4 q^{28}-2 q^{26}+4 q^{24}-6 q^{22}+5 q^{20}-6 q^{18}+4 q^{16}-6 q^{14}-q^{12}-6 q^8+8 q^6-8 q^4+16 q^2-6+16 q^{-2} -8 q^{-4} +8 q^{-6} -6 q^{-8} - q^{-12} -6 q^{-14} +4 q^{-16} -6 q^{-18} +5 q^{-20} -6 q^{-22} +4 q^{-24} -2 q^{-26} +4 q^{-28} -2 q^{-30} +2 q^{-32} + q^{-36} }[/math]
2,0	[math]\displaystyle{ q^{36}+q^{34}+q^{32}+q^{28}+q^{26}-q^{24}-3 q^{22}-2 q^{20}-2 q^{14}+2 q^{10}+q^4+2 q^2+2+2 q^{-2} + q^{-4} +2 q^{-10} -2 q^{-14} -2 q^{-20} -3 q^{-22} - q^{-24} + q^{-26} + q^{-28} + q^{-32} + q^{-34} + q^{-36} }[/math]

A3 Invariants.

Weight	Invariant
0,1,0	[math]\displaystyle{ q^{28}+q^{24}+q^{22}+q^{18}+2 q^{16}-2 q^{14}-q^{12}-3 q^8-q^6+q^4+2 q^2+2+2 q^{-2} + q^{-4} - q^{-6} -3 q^{-8} - q^{-12} -2 q^{-14} +2 q^{-16} + q^{-18} + q^{-22} + q^{-24} + q^{-28} }[/math]
1,0,0	[math]\displaystyle{ q^{19}+q^{17}+q^{15}+q^{11}-q^5-q- q^{-1} - q^{-5} + q^{-11} + q^{-15} + q^{-17} + q^{-19} }[/math]

B2 Invariants.

Weight	Invariant
0,1	[math]\displaystyle{ q^{28}+q^{24}-q^{22}+2 q^{20}-q^{18}+2 q^{16}+q^{12}-q^8+q^6-3 q^4+2 q^2-4+2 q^{-2} -3 q^{-4} + q^{-6} - q^{-8} + q^{-12} +2 q^{-16} - q^{-18} +2 q^{-20} - q^{-22} + q^{-24} + q^{-28} }[/math]
1,0	[math]\displaystyle{ q^{46}+q^{38}+q^{36}-q^{32}+q^{28}+2 q^{26}-q^{24}-2 q^{22}-q^{20}+q^{18}-2 q^{14}-q^{12}+q^8+q^2+3+ q^{-2} + q^{-8} - q^{-12} -2 q^{-14} + q^{-18} - q^{-20} -2 q^{-22} - q^{-24} +2 q^{-26} + q^{-28} - q^{-32} + q^{-36} + q^{-38} + q^{-46} }[/math]

G2 Invariants.

Weight

Invariant

1,0

[math]\displaystyle{ q^{66}+q^{62}-q^{60}+q^{58}+q^{56}-q^{54}+2 q^{52}-q^{50}+2 q^{48}-q^{46}+q^{42}-2 q^{40}+4 q^{38}-3 q^{36}+q^{34}+q^{32}-2 q^{30}+3 q^{28}-2 q^{26}+q^{24}+2 q^{22}-2 q^{20}+q^{18}-2 q^{14}+4 q^{12}-4 q^{10}+q^8-3 q^4+3 q^2-5+3 q^{-2} -3 q^{-4} + q^{-8} -4 q^{-10} +4 q^{-12} -2 q^{-14} + q^{-18} -2 q^{-20} +2 q^{-22} + q^{-24} -2 q^{-26} +3 q^{-28} -2 q^{-30} + q^{-32} + q^{-34} -3 q^{-36} +4 q^{-38} -2 q^{-40} + q^{-42} - q^{-46} +2 q^{-48} - q^{-50} +2 q^{-52} - q^{-54} + q^{-56} + q^{-58} - q^{-60} + q^{-62} + q^{-66} }[/math]

.

Computer Talk

The above data is available with the Mathematica package KnotTheory`, as shown in the (simulated) Mathematica session below. Your input (in red) is realistic; all else should have the same content as in a real mathematica session, but with different formatting. This Mathematica session is also available (albeit only for the knot 5_2) as the notebook PolynomialInvariantsSession.nb.

(The path below may be different on your system, and possibly also the KnotTheory` date)

In[1]:=

AppendTo[$Path, "C:/drorbn/projects/KAtlas/"]; << KnotTheory`

Loading KnotTheory` version of August 31, 2006, 11:25:27.5625. Read more at http://katlas.math.toronto.edu/wiki/KnotTheory.

In[3]:=

K = Knot["8 3"];

In[4]:=

Alexander[K][t]

KnotTheory::loading: Loading precomputed data in PD4Knots`.

Out[4]=

[math]\displaystyle{ -4 t+9-4 t^{-1} }[/math]

In[5]:=

Conway[K][z]

Out[5]=

[math]\displaystyle{ 1-4 z^2 }[/math]

In[6]:=

Alexander[K, 2][t]

KnotTheory::credits: The program Alexander[K, r] to compute Alexander ideals was written by Jana Archibald at the University of Toronto in the summer of 2005.

Out[6]=

[math]\displaystyle{ \{1\} }[/math]

In[7]:=

{KnotDet[K], KnotSignature[K]}

Out[7]=

{ 17, 0 }

In[8]:=

Jones[K][q]

KnotTheory::loading: Loading precomputed data in Jones4Knots`.

Out[8]=

[math]\displaystyle{ q^4-q^3+2 q^2-3 q+3-3 q^{-1} +2 q^{-2} - q^{-3} + q^{-4} }[/math]

In[9]:=

HOMFLYPT[K][a, z]

KnotTheory::credits: The HOMFLYPT program was written by Scott Morrison.

Out[9]=

[math]\displaystyle{ a^4-z^2 a^2-2 z^2-1-z^2 a^{-2} + a^{-4} }[/math]

In[10]:=

Kauffman[K][a, z]

KnotTheory::loading: Loading precomputed data in Kauffman4Knots`.

Out[10]=

[math]\displaystyle{ a z^7+z^7 a^{-1} +a^2 z^6+z^6 a^{-2} +2 z^6+a^3 z^5-4 a z^5-4 z^5 a^{-1} +z^5 a^{-3} +a^4 z^4-2 a^2 z^4-2 z^4 a^{-2} +z^4 a^{-4} -6 z^4-2 a^3 z^3+8 a z^3+8 z^3 a^{-1} -2 z^3 a^{-3} -3 a^4 z^2+a^2 z^2+z^2 a^{-2} -3 z^2 a^{-4} +8 z^2-4 a z-4 z a^{-1} +a^4+ a^{-4} -1 }[/math]