8 12

Polynomial invariants

Alexander 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 t^2-7 t+13-7 t^{-1} + t^{-2} }
Conway 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 z^4-3 z^2+1}
2nd Alexander ideal (db, data sources)	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 \{1\}}
Determinant and Signature	{ 29, 0 }
Jones 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 q^4-2 q^3+4 q^2-5 q+5-5 q^{-1} +4 q^{-2} -2 q^{-3} + q^{-4} }
HOMFLY-PT polynomial (db, data sources)	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^4-2 z^2 a^2-a^2+z^4+z^2+1-2 z^2 a^{-2} - a^{-2} + a^{-4} }
Kauffman polynomial (db, data sources)	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 z^7+z^7 a^{-1} +2 a^2 z^6+2 z^6 a^{-2} +4 z^6+2 a^3 z^5+2 a z^5+2 z^5 a^{-1} +2 z^5 a^{-3} +a^4 z^4-a^2 z^4-z^4 a^{-2} +z^4 a^{-4} -4 z^4-3 a^3 z^3-3 a z^3-3 z^3 a^{-1} -3 z^3 a^{-3} -2 a^4 z^2-2 a^2 z^2-2 z^2 a^{-2} -2 z^2 a^{-4} +a^3 z+z a^{-3} +a^4+a^2+ a^{-2} + a^{-4} +1}
The A2 invariant	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 q^{14}+q^{12}-q^{10}+q^8-q^4+q^2-1+ q^{-2} - q^{-4} + q^{-8} - q^{-10} + q^{-12} + q^{-14} }
The G2 invariant	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 q^{66}-q^{64}+3 q^{62}-3 q^{60}+2 q^{58}-3 q^{54}+9 q^{52}-11 q^{50}+12 q^{48}-8 q^{46}+10 q^{42}-17 q^{40}+23 q^{38}-18 q^{36}+8 q^{34}+4 q^{32}-16 q^{30}+17 q^{28}-13 q^{26}+3 q^{24}+6 q^{22}-12 q^{20}+9 q^{18}-12 q^{14}+21 q^{12}-23 q^{10}+15 q^8-q^6-14 q^4+27 q^2-29+27 q^{-2} -14 q^{-4} - q^{-6} +15 q^{-8} -23 q^{-10} +21 q^{-12} -12 q^{-14} +9 q^{-18} -12 q^{-20} +6 q^{-22} +3 q^{-24} -13 q^{-26} +17 q^{-28} -16 q^{-30} +4 q^{-32} +8 q^{-34} -18 q^{-36} +23 q^{-38} -17 q^{-40} +10 q^{-42} -8 q^{-46} +12 q^{-48} -11 q^{-50} +9 q^{-52} -3 q^{-54} +2 q^{-58} -3 q^{-60} +3 q^{-62} - q^{-64} + q^{-66} }

Further Quantum Invariants

Further quantum knot invariants for 8_12.

A1 Invariants.

Weight	Invariant
1	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 q^9-q^7+2 q^5-q^3- q^{-3} +2 q^{-5} - q^{-7} + q^{-9} }
2	$q^{26}-q^{24}-q^{22}+4q^{20}-2q^{18}-5q^{16}+7q^{14}-7q^{10}+5q^{8}+2q^{6}-4q^{4}+q^{2}+3+q^{-2}-4q^{-4}+2q^{-6}+5q^{-8}-7q^{-10}+7q^{-14}-5q^{-16}-2q^{-18}+4q^{-20}-q^{-22}-q^{-24}+q^{-26}$
3	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 q^{51}-q^{49}-q^{47}+q^{45}+3 q^{43}-2 q^{41}-7 q^{39}+2 q^{37}+12 q^{35}+q^{33}-16 q^{31}-7 q^{29}+20 q^{27}+12 q^{25}-20 q^{23}-17 q^{21}+16 q^{19}+22 q^{17}-12 q^{15}-20 q^{13}+7 q^{11}+18 q^9-2 q^7-13 q^5-4 q^3+9 q+9 q^{-1} -4 q^{-3} -13 q^{-5} -2 q^{-7} +18 q^{-9} +7 q^{-11} -20 q^{-13} -12 q^{-15} +22 q^{-17} +16 q^{-19} -17 q^{-21} -20 q^{-23} +12 q^{-25} +20 q^{-27} -7 q^{-29} -16 q^{-31} + q^{-33} +12 q^{-35} +2 q^{-37} -7 q^{-39} -2 q^{-41} +3 q^{-43} + q^{-45} - q^{-47} - q^{-49} + q^{-51} }
4	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 q^{84}-q^{82}-q^{80}+q^{78}+3 q^{74}-4 q^{72}-5 q^{70}+3 q^{68}+5 q^{66}+14 q^{64}-9 q^{62}-22 q^{60}-7 q^{58}+11 q^{56}+44 q^{54}+4 q^{52}-40 q^{50}-42 q^{48}-7 q^{46}+77 q^{44}+44 q^{42}-32 q^{40}-76 q^{38}-49 q^{36}+76 q^{34}+80 q^{32}+5 q^{30}-78 q^{28}-82 q^{26}+44 q^{24}+81 q^{22}+33 q^{20}-50 q^{18}-75 q^{16}+8 q^{14}+52 q^{12}+42 q^{10}-15 q^8-49 q^6-20 q^4+18 q^2+41+18 q^{-2} -20 q^{-4} -49 q^{-6} -15 q^{-8} +42 q^{-10} +52 q^{-12} +8 q^{-14} -75 q^{-16} -50 q^{-18} +33 q^{-20} +81 q^{-22} +44 q^{-24} -82 q^{-26} -78 q^{-28} +5 q^{-30} +80 q^{-32} +76 q^{-34} -49 q^{-36} -76 q^{-38} -32 q^{-40} +44 q^{-42} +77 q^{-44} -7 q^{-46} -42 q^{-48} -40 q^{-50} +4 q^{-52} +44 q^{-54} +11 q^{-56} -7 q^{-58} -22 q^{-60} -9 q^{-62} +14 q^{-64} +5 q^{-66} +3 q^{-68} -5 q^{-70} -4 q^{-72} +3 q^{-74} + q^{-78} - q^{-80} - q^{-82} + q^{-84} }
5	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 q^{125}-q^{123}-q^{121}+q^{119}+q^{113}-2 q^{111}-4 q^{109}+3 q^{107}+7 q^{105}+5 q^{103}-13 q^{99}-19 q^{97}-6 q^{95}+23 q^{93}+39 q^{91}+22 q^{89}-23 q^{87}-67 q^{85}-59 q^{83}+8 q^{81}+95 q^{79}+114 q^{77}+28 q^{75}-105 q^{73}-174 q^{71}-96 q^{69}+88 q^{67}+233 q^{65}+180 q^{63}-46 q^{61}-258 q^{59}-266 q^{57}-31 q^{55}+253 q^{53}+337 q^{51}+116 q^{49}-221 q^{47}-367 q^{45}-192 q^{43}+157 q^{41}+366 q^{39}+250 q^{37}-93 q^{35}-333 q^{33}-262 q^{31}+25 q^{29}+273 q^{27}+260 q^{25}+20 q^{23}-207 q^{21}-230 q^{19}-56 q^{17}+140 q^{15}+196 q^{13}+81 q^{11}-80 q^9-157 q^7-104 q^5+27 q^3+127 q+127 q^{-1} +27 q^{-3} -104 q^{-5} -157 q^{-7} -80 q^{-9} +81 q^{-11} +196 q^{-13} +140 q^{-15} -56 q^{-17} -230 q^{-19} -207 q^{-21} +20 q^{-23} +260 q^{-25} +273 q^{-27} +25 q^{-29} -262 q^{-31} -333 q^{-33} -93 q^{-35} +250 q^{-37} +366 q^{-39} +157 q^{-41} -192 q^{-43} -367 q^{-45} -221 q^{-47} +116 q^{-49} +337 q^{-51} +253 q^{-53} -31 q^{-55} -266 q^{-57} -258 q^{-59} -46 q^{-61} +180 q^{-63} +233 q^{-65} +88 q^{-67} -96 q^{-69} -174 q^{-71} -105 q^{-73} +28 q^{-75} +114 q^{-77} +95 q^{-79} +8 q^{-81} -59 q^{-83} -67 q^{-85} -23 q^{-87} +22 q^{-89} +39 q^{-91} +23 q^{-93} -6 q^{-95} -19 q^{-97} -13 q^{-99} +5 q^{-103} +7 q^{-105} +3 q^{-107} -4 q^{-109} -2 q^{-111} + q^{-113} + q^{-119} - q^{-121} - q^{-123} + q^{-125} }

A2 Invariants.

Weight	Invariant
1,0	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 q^{14}+q^{12}-q^{10}+q^8-q^4+q^2-1+ q^{-2} - q^{-4} + q^{-8} - q^{-10} + q^{-12} + q^{-14} }
1,1	$q^{36}-2q^{34}+6q^{32}-10q^{30}+19q^{28}-30q^{26}+42q^{24}-54q^{22}+64q^{20}-70q^{18}+62q^{16}-46q^{14}+23q^{12}+10q^{10}-44q^{8}+80q^{6}-106q^{4}+124q^{2}-130+124q^{-2}-106q^{-4}+80q^{-6}-44q^{-8}+10q^{-10}+23q^{-12}-46q^{-14}+62q^{-16}-70q^{-18}+64q^{-20}-54q^{-22}+42q^{-24}-30q^{-26}+19q^{-28}-10q^{-30}+6q^{-32}-2q^{-34}+q^{-36}$
2,0	$q^{36}+q^{34}-2q^{30}+3q^{26}-4q^{22}-q^{20}+4q^{18}+2q^{16}-5q^{14}+4q^{10}-q^{8}-2q^{6}+q^{4}+2q^{2}+2q^{-2}+q^{-4}-2q^{-6}-q^{-8}+4q^{-10}-5q^{-14}+2q^{-16}+4q^{-18}-q^{-20}-4q^{-22}+3q^{-26}-2q^{-30}+q^{-34}+q^{-36}$

A3 Invariants.

Weight	Invariant
0,1,0	$q^{28}-q^{26}+q^{24}+3q^{22}-3q^{20}+q^{18}+5q^{16}-6q^{14}+4q^{10}-5q^{8}-q^{6}+3q^{4}+q^{2}+q^{-2}+3q^{-4}-q^{-6}-5q^{-8}+4q^{-10}-6q^{-14}+5q^{-16}+q^{-18}-3q^{-20}+3q^{-22}+q^{-24}-q^{-26}+q^{-28}$
1,0,0	$q^{19}+q^{17}+q^{15}-q^{13}+q^{11}-q^{9}-q^{5}+q^{3}+q^{-3}-q^{-5}-q^{-9}+q^{-11}-q^{-13}+q^{-15}+q^{-17}+q^{-19}$

B2 Invariants.

Weight	Invariant
0,1	$q^{28}-q^{26}+3q^{24}-3q^{22}+5q^{20}-5q^{18}+5q^{16}-4q^{14}+2q^{12}-3q^{8}+5q^{6}-7q^{4}+9q^{2}-10+9q^{-2}-7q^{-4}+5q^{-6}-3q^{-8}+2q^{-12}-4q^{-14}+5q^{-16}-5q^{-18}+5q^{-20}-3q^{-22}+3q^{-24}-q^{-26}+q^{-28}$
1,0	$q^{46}-q^{42}-q^{40}+2q^{38}+3q^{36}-4q^{32}-2q^{30}+4q^{28}+5q^{26}-2q^{24}-6q^{22}-q^{20}+5q^{18}+2q^{16}-4q^{14}-3q^{12}+2q^{10}+3q^{8}-q^{6}-3q^{4}+q^{2}+5+q^{-2}-3q^{-4}-q^{-6}+3q^{-8}+2q^{-10}-3q^{-12}-4q^{-14}+2q^{-16}+5q^{-18}-q^{-20}-6q^{-22}-2q^{-24}+5q^{-26}+4q^{-28}-2q^{-30}-4q^{-32}+3q^{-36}+2q^{-38}-q^{-40}-q^{-42}+q^{-46}$

G2 Invariants.

Weight

Invariant

1,0

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 q^{66}-q^{64}+3 q^{62}-3 q^{60}+2 q^{58}-3 q^{54}+9 q^{52}-11 q^{50}+12 q^{48}-8 q^{46}+10 q^{42}-17 q^{40}+23 q^{38}-18 q^{36}+8 q^{34}+4 q^{32}-16 q^{30}+17 q^{28}-13 q^{26}+3 q^{24}+6 q^{22}-12 q^{20}+9 q^{18}-12 q^{14}+21 q^{12}-23 q^{10}+15 q^8-q^6-14 q^4+27 q^2-29+27 q^{-2} -14 q^{-4} - q^{-6} +15 q^{-8} -23 q^{-10} +21 q^{-12} -12 q^{-14} +9 q^{-18} -12 q^{-20} +6 q^{-22} +3 q^{-24} -13 q^{-26} +17 q^{-28} -16 q^{-30} +4 q^{-32} +8 q^{-34} -18 q^{-36} +23 q^{-38} -17 q^{-40} +10 q^{-42} -8 q^{-46} +12 q^{-48} -11 q^{-50} +9 q^{-52} -3 q^{-54} +2 q^{-58} -3 q^{-60} +3 q^{-62} - q^{-64} + q^{-66} }

.

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 12"];

In[4]:=

Alexander[K][t]

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

Out[4]=

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^2-7 t+13-7 t^{-1} + t^{-2} }

In[5]:=

Conway[K][z]

Out[5]=

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 z^4-3 z^2+1}

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]=

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 \{1\}}

In[7]:=

{KnotDet[K], KnotSignature[K]}

Out[7]=

{ 29, 0 }

In[8]:=

Jones[K][q]

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

Out[8]=

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 q^4-2 q^3+4 q^2-5 q+5-5 q^{-1} +4 q^{-2} -2 q^{-3} + q^{-4} }

In[9]:=

HOMFLYPT[K][a, z]

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

Out[9]=

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^4-2 z^2 a^2-a^2+z^4+z^2+1-2 z^2 a^{-2} - a^{-2} + a^{-4} }

In[10]:=

Kauffman[K][a, z]

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

Out[10]=

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 z^7+z^7 a^{-1} +2 a^2 z^6+2 z^6 a^{-2} +4 z^6+2 a^3 z^5+2 a z^5+2 z^5 a^{-1} +2 z^5 a^{-3} +a^4 z^4-a^2 z^4-z^4 a^{-2} +z^4 a^{-4} -4 z^4-3 a^3 z^3-3 a z^3-3 z^3 a^{-1} -3 z^3 a^{-3} -2 a^4 z^2-2 a^2 z^2-2 z^2 a^{-2} -2 z^2 a^{-4} +a^3 z+z a^{-3} +a^4+a^2+ a^{-2} + a^{-4} +1}