9 40

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9 39.gif

9_39

9 41.gif

9_41

9 40.gif Visit 9 40's page at the Knot Server (KnotPlot driven, includes 3D interactive images!)

Visit 9 40's page at Knotilus!

Visit 9 40's page at the original Knot Atlas!

9 40 Quick Notes



In three-fold symmetrical form
Symmetrical triangular form
(less open)


(alternate)
Variant
Obtained by an epitrochoid.
Cylindrical depiction.
9.40 as a geodesic line of the oblate spheroid


Photo of an alsatian chair, musée de l'oeuvre Notre Dame, Strasbourg, France.


Knot presentations

Planar diagram presentation X1627 X7,12,8,13 X5,15,6,14 X11,3,12,2 X15,10,16,11 X3,16,4,17 X9,4,10,5 X17,9,18,8 X13,18,14,1
Gauss code -1, 4, -6, 7, -3, 1, -2, 8, -7, 5, -4, 2, -9, 3, -5, 6, -8, 9
Dowker-Thistlethwaite code 6 16 14 12 4 2 18 10 8
Conway Notation [9*]

Three dimensional invariants

Symmetry type Reversible
Unknotting number 2
3-genus 3
Bridge index 3
Super bridge index 4
Nakanishi index 2
Maximal Thurston-Bennequin number [-9][-2]
Hyperbolic Volume 15.0183
A-Polynomial See Data:9 40/A-polynomial

[edit Notes for 9 40's three dimensional invariants]

Four dimensional invariants

Smooth 4 genus 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}
Topological 4 genus 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}
Concordance genus 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 [1,3]}
Rasmussen s-Invariant -2

[edit Notes for 9 40's four dimensional invariants]

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^3-7 t^2+18 t-23+18 t^{-1} -7 t^{-2} + t^{-3} }
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^6-z^4-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 \left\{t^2-3 t+1\right\}}
Determinant and Signature { 75, -2 }
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^2+5 q-8+11 q^{-1} -13 q^{-2} +13 q^{-3} -11 q^{-4} +8 q^{-5} -4 q^{-6} + q^{-7} }
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 z^2 a^6-2 z^4 a^4-2 z^2 a^4+a^4+z^6 a^2+2 z^4 a^2-2 a^2-z^4+2}
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 z^4 a^8+4 z^5 a^7-2 z^3 a^7+8 z^6 a^6-9 z^4 a^6+4 z^2 a^6+9 z^7 a^5-12 z^5 a^5+6 z^3 a^5-z a^5+4 z^8 a^4+7 z^6 a^4-20 z^4 a^4+7 z^2 a^4+a^4+17 z^7 a^3-32 z^5 a^3+14 z^3 a^3-z a^3+4 z^8 a^2+4 z^6 a^2-17 z^4 a^2+3 z^2 a^2+2 a^2+8 z^7 a-15 z^5 a+6 z^3 a+5 z^6-7 z^4+2+z^5 a^{-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^{22}-q^{20}-2 q^{18}+3 q^{16}-q^{14}+2 q^{12}+q^{10}-3 q^8+q^6-4 q^4+3 q^2+1+3 q^{-4} - q^{-6} }
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^{114}-3 q^{112}+6 q^{110}-10 q^{108}+10 q^{106}-8 q^{104}+q^{102}+17 q^{100}-35 q^{98}+57 q^{96}-69 q^{94}+58 q^{92}-26 q^{90}-41 q^{88}+121 q^{86}-182 q^{84}+197 q^{82}-139 q^{80}+14 q^{78}+135 q^{76}-248 q^{74}+274 q^{72}-196 q^{70}+38 q^{68}+122 q^{66}-223 q^{64}+212 q^{62}-79 q^{60}-87 q^{58}+218 q^{56}-237 q^{54}+135 q^{52}+47 q^{50}-232 q^{48}+337 q^{46}-328 q^{44}+209 q^{42}-7 q^{40}-197 q^{38}+334 q^{36}-361 q^{34}+269 q^{32}-104 q^{30}-93 q^{28}+225 q^{26}-263 q^{24}+194 q^{22}-39 q^{20}-123 q^{18}+217 q^{16}-194 q^{14}+58 q^{12}+116 q^{10}-252 q^8+282 q^6-192 q^4+31 q^2+141-245 q^{-2} +261 q^{-4} -179 q^{-6} +57 q^{-8} +53 q^{-10} -121 q^{-12} +126 q^{-14} -87 q^{-16} +44 q^{-18} -2 q^{-20} -19 q^{-22} +24 q^{-24} -20 q^{-26} +10 q^{-28} -4 q^{-30} + q^{-32} }
Further Quantum Invariants
Further quantum knot invariants for 9_40.

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^{15}-3 q^{13}+4 q^{11}-3 q^9+2 q^7-2 q^3+3 q-3 q^{-1} +4 q^{-3} - q^{-5} }
2 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^{42}-3 q^{40}+q^{38}+9 q^{36}-16 q^{34}-3 q^{32}+33 q^{30}-22 q^{28}-22 q^{26}+40 q^{24}-8 q^{22}-30 q^{20}+20 q^{18}+12 q^{16}-17 q^{14}-8 q^{12}+23 q^{10}+2 q^8-31 q^6+22 q^4+22 q^2-39+6 q^{-2} +30 q^{-4} -23 q^{-6} -9 q^{-8} +17 q^{-10} - q^{-12} -4 q^{-14} + q^{-16} }
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^{81}-3 q^{79}+q^{77}+6 q^{75}-4 q^{73}-15 q^{71}+6 q^{69}+47 q^{67}-7 q^{65}-96 q^{63}-23 q^{61}+150 q^{59}+98 q^{57}-188 q^{55}-190 q^{53}+175 q^{51}+278 q^{49}-113 q^{47}-333 q^{45}+25 q^{43}+330 q^{41}+63 q^{39}-274 q^{37}-133 q^{35}+194 q^{33}+176 q^{31}-106 q^{29}-195 q^{27}+19 q^{25}+205 q^{23}+57 q^{21}-209 q^{19}-133 q^{17}+203 q^{15}+208 q^{13}-176 q^{11}-271 q^9+115 q^7+321 q^5-34 q^3-324 q-59 q^{-1} +279 q^{-3} +139 q^{-5} -192 q^{-7} -173 q^{-9} +96 q^{-11} +153 q^{-13} -16 q^{-15} -102 q^{-17} -28 q^{-19} +52 q^{-21} +24 q^{-23} -11 q^{-25} -13 q^{-27} + q^{-29} +4 q^{-31} - q^{-33} }
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^{132}-3 q^{130}+q^{128}+6 q^{126}-7 q^{124}-3 q^{122}-6 q^{120}+26 q^{118}+38 q^{116}-57 q^{114}-83 q^{112}-54 q^{110}+169 q^{108}+307 q^{106}-58 q^{104}-449 q^{102}-561 q^{100}+209 q^{98}+1103 q^{96}+687 q^{94}-602 q^{92}-1796 q^{90}-834 q^{88}+1520 q^{86}+2270 q^{84}+609 q^{82}-2404 q^{80}-2683 q^{78}+308 q^{76}+2944 q^{74}+2520 q^{72}-1207 q^{70}-3340 q^{68}-1547 q^{66}+1770 q^{64}+3142 q^{62}+602 q^{60}-2211 q^{58}-2299 q^{56}+53 q^{54}+2248 q^{52}+1548 q^{50}-641 q^{48}-1962 q^{46}-1023 q^{44}+1075 q^{42}+1812 q^{40}+483 q^{38}-1542 q^{36}-1702 q^{34}+205 q^{32}+2090 q^{30}+1450 q^{28}-1214 q^{26}-2450 q^{24}-829 q^{22}+2208 q^{20}+2605 q^{18}-303 q^{16}-2836 q^{14}-2279 q^{12}+1320 q^{10}+3252 q^8+1350 q^6-1886 q^4-3163 q^2-544+2305 q^{-2} +2419 q^{-4} +110 q^{-6} -2297 q^{-8} -1724 q^{-10} +331 q^{-12} +1714 q^{-14} +1253 q^{-16} -522 q^{-18} -1171 q^{-20} -683 q^{-22} +324 q^{-24} +800 q^{-26} +287 q^{-28} -187 q^{-30} -393 q^{-32} -164 q^{-34} +136 q^{-36} +134 q^{-38} +65 q^{-40} -44 q^{-42} -53 q^{-44} -4 q^{-46} +7 q^{-48} +13 q^{-50} - q^{-52} -4 q^{-54} + q^{-56} }
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^{195}-3 q^{193}+q^{191}+6 q^{189}-7 q^{187}-6 q^{185}+6 q^{183}+14 q^{181}+17 q^{179}-6 q^{177}-68 q^{175}-90 q^{173}+31 q^{171}+223 q^{169}+281 q^{167}+9 q^{165}-504 q^{163}-829 q^{161}-385 q^{159}+910 q^{157}+1976 q^{155}+1479 q^{153}-919 q^{151}-3669 q^{149}-3993 q^{147}-320 q^{145}+5365 q^{143}+7993 q^{141}+3795 q^{139}-5578 q^{137}-12701 q^{135}-10047 q^{133}+2784 q^{131}+16391 q^{129}+18101 q^{127}+3797 q^{125}-16705 q^{123}-25866 q^{121}-13539 q^{119}+12444 q^{117}+30646 q^{115}+24001 q^{113}-3906 q^{111}-30412 q^{109}-32341 q^{107}-6868 q^{105}+25059 q^{103}+36221 q^{101}+16940 q^{99}-16089 q^{97}-34824 q^{95}-23986 q^{93}+5996 q^{91}+29197 q^{89}+26869 q^{87}+2813 q^{85}-21320 q^{83}-25896 q^{81}-9071 q^{79}+13300 q^{77}+22554 q^{75}+12559 q^{73}-6644 q^{71}-18493 q^{69}-13997 q^{67}+1817 q^{65}+15043 q^{63}+14672 q^{61}+1434 q^{59}-12928 q^{57}-15598 q^{55}-3914 q^{53}+11985 q^{51}+17517 q^{49}+6674 q^{47}-11643 q^{45}-20517 q^{43}-10461 q^{41}+10796 q^{39}+23989 q^{37}+15718 q^{35}-8296 q^{33}-26901 q^{31}-22122 q^{29}+3419 q^{27}+27710 q^{25}+28570 q^{23}+4041 q^{21}-25170 q^{19}-33454 q^{17}-13019 q^{15}+18728 q^{13}+34795 q^{11}+21734 q^9-9014 q^7-31506 q^5-27744 q^3-2006 q+23734 q^{-1} +29144 q^{-3} +11595 q^{-5} -13164 q^{-7} -25450 q^{-9} -17354 q^{-11} +2643 q^{-13} +17992 q^{-15} +18081 q^{-17} +5151 q^{-19} -9254 q^{-21} -14599 q^{-23} -8790 q^{-25} +1983 q^{-27} +9097 q^{-29} +8440 q^{-31} +2256 q^{-33} -3848 q^{-35} -5856 q^{-37} -3509 q^{-39} +517 q^{-41} +2960 q^{-43} +2723 q^{-45} +860 q^{-47} -888 q^{-49} -1496 q^{-51} -918 q^{-53} +30 q^{-55} +527 q^{-57} +501 q^{-59} +179 q^{-61} -102 q^{-63} -195 q^{-65} -107 q^{-67} +7 q^{-69} +45 q^{-71} +33 q^{-73} +8 q^{-75} -7 q^{-77} -13 q^{-79} + q^{-81} +4 q^{-83} - q^{-85} }

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^{22}-q^{20}-2 q^{18}+3 q^{16}-q^{14}+2 q^{12}+q^{10}-3 q^8+q^6-4 q^4+3 q^2+1+3 q^{-4} - q^{-6} }
1,1 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^{60}-6 q^{58}+18 q^{56}-38 q^{54}+75 q^{52}-144 q^{50}+244 q^{48}-382 q^{46}+576 q^{44}-798 q^{42}+1004 q^{40}-1168 q^{38}+1223 q^{36}-1110 q^{34}+828 q^{32}-360 q^{30}-236 q^{28}+880 q^{26}-1502 q^{24}+1988 q^{22}-2316 q^{20}+2426 q^{18}-2296 q^{16}+1966 q^{14}-1452 q^{12}+850 q^{10}-198 q^8-408 q^6+885 q^4-1194 q^2+1304-1250 q^{-2} +1061 q^{-4} -814 q^{-6} +568 q^{-8} -338 q^{-10} +184 q^{-12} -88 q^{-14} +32 q^{-16} -8 q^{-18} + q^{-20} }
2,0 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^{56}-q^{54}-3 q^{52}+2 q^{50}+6 q^{48}-q^{46}-11 q^{44}-q^{42}+16 q^{40}-3 q^{38}-13 q^{36}+6 q^{34}+16 q^{32}-3 q^{30}-19 q^{28}+7 q^{26}+4 q^{24}-12 q^{22}-q^{20}+8 q^{18}-2 q^{16}+16 q^{12}-12 q^8+2 q^6+14 q^4-10 q^2-18+12 q^{-2} +10 q^{-4} -8 q^{-6} -6 q^{-8} +6 q^{-10} +9 q^{-12} -3 q^{-14} -3 q^{-16} + q^{-18} }

A3 Invariants.

Weight Invariant
0,1,0 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^{48}-3 q^{46}+9 q^{42}-10 q^{40}-4 q^{38}+22 q^{36}-19 q^{34}-10 q^{32}+29 q^{30}-20 q^{28}-8 q^{26}+24 q^{24}-7 q^{22}-6 q^{20}+5 q^{18}+7 q^{16}-4 q^{14}-15 q^{12}+13 q^{10}+7 q^8-28 q^6+15 q^4+15 q^2-26+16 q^{-2} +10 q^{-4} -15 q^{-6} +9 q^{-8} +2 q^{-10} -4 q^{-12} + q^{-14} }
1,0,0 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^{29}-q^{27}-2 q^{23}+3 q^{21}-2 q^{19}+4 q^{17}+q^{13}-2 q^{11}-2 q^9-q^7-3 q^5+3 q^3+4 q^{-1} - q^{-3} +3 q^{-5} - q^{-7} }

A4 Invariants.

Weight Invariant
0,1,0,0 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^{62}-q^{60}-3 q^{58}+q^{56}+6 q^{54}+q^{52}-10 q^{50}+2 q^{48}+15 q^{46}-9 q^{44}-19 q^{42}+16 q^{40}+13 q^{38}-21 q^{36}-6 q^{34}+23 q^{32}-21 q^{28}+13 q^{26}+18 q^{24}-20 q^{22}-4 q^{20}+29 q^{18}-12 q^{16}-23 q^{14}+20 q^{12}+8 q^{10}-28 q^8-8 q^6+21 q^4-15+11 q^{-2} +17 q^{-4} -6 q^{-6} -4 q^{-8} +8 q^{-10} - q^{-12} -3 q^{-14} + q^{-16} }
1,0,0,0 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^{36}-q^{34}-2 q^{28}+3 q^{26}-2 q^{24}+3 q^{22}+2 q^{20}+q^{16}-2 q^{14}-q^{12}-4 q^{10}-3 q^6+3 q^4+3+3 q^{-2} - q^{-4} +3 q^{-6} - q^{-8} }

B2 Invariants.

Weight Invariant
0,1 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^{48}-3 q^{46}+6 q^{44}-11 q^{42}+18 q^{40}-24 q^{38}+30 q^{36}-33 q^{34}+28 q^{32}-21 q^{30}+10 q^{28}+4 q^{26}-18 q^{24}+37 q^{22}-48 q^{20}+57 q^{18}-59 q^{16}+54 q^{14}-47 q^{12}+31 q^{10}-17 q^8-2 q^6+15 q^4-23 q^2+30-30 q^{-2} +32 q^{-4} -23 q^{-6} +17 q^{-8} -10 q^{-10} +4 q^{-12} - q^{-14} }
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^{78}-3 q^{74}-3 q^{72}+3 q^{70}+10 q^{68}+3 q^{66}-14 q^{64}-14 q^{62}+9 q^{60}+26 q^{58}+4 q^{56}-31 q^{54}-19 q^{52}+22 q^{50}+29 q^{48}-9 q^{46}-32 q^{44}-2 q^{42}+29 q^{40}+12 q^{38}-23 q^{36}-14 q^{34}+17 q^{32}+18 q^{30}-11 q^{28}-21 q^{26}+6 q^{24}+21 q^{22}-q^{20}-23 q^{18}-5 q^{16}+24 q^{14}+15 q^{12}-24 q^{10}-27 q^8+15 q^6+34 q^4-32-15 q^{-2} +23 q^{-4} +25 q^{-6} -10 q^{-8} -19 q^{-10} - q^{-12} +13 q^{-14} +6 q^{-16} -4 q^{-18} -4 q^{-20} + q^{-24} }

D4 Invariants.

Weight Invariant
1,0,0,0 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}-3 q^{64}+3 q^{62}-4 q^{60}+10 q^{58}-14 q^{56}+14 q^{54}-17 q^{52}+26 q^{50}-27 q^{48}+21 q^{46}-23 q^{44}+20 q^{42}-11 q^{40}+2 q^{38}+q^{36}-10 q^{34}+28 q^{32}-29 q^{30}+36 q^{28}-41 q^{26}+48 q^{24}-43 q^{22}+40 q^{20}-43 q^{18}+30 q^{16}-24 q^{14}+14 q^{12}-12 q^{10}-4 q^8+14 q^6-15 q^4+21 q^2-22+29 q^{-2} -22 q^{-4} +24 q^{-6} -19 q^{-8} +14 q^{-10} -8 q^{-12} +6 q^{-14} -4 q^{-16} + q^{-18} }

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^{114}-3 q^{112}+6 q^{110}-10 q^{108}+10 q^{106}-8 q^{104}+q^{102}+17 q^{100}-35 q^{98}+57 q^{96}-69 q^{94}+58 q^{92}-26 q^{90}-41 q^{88}+121 q^{86}-182 q^{84}+197 q^{82}-139 q^{80}+14 q^{78}+135 q^{76}-248 q^{74}+274 q^{72}-196 q^{70}+38 q^{68}+122 q^{66}-223 q^{64}+212 q^{62}-79 q^{60}-87 q^{58}+218 q^{56}-237 q^{54}+135 q^{52}+47 q^{50}-232 q^{48}+337 q^{46}-328 q^{44}+209 q^{42}-7 q^{40}-197 q^{38}+334 q^{36}-361 q^{34}+269 q^{32}-104 q^{30}-93 q^{28}+225 q^{26}-263 q^{24}+194 q^{22}-39 q^{20}-123 q^{18}+217 q^{16}-194 q^{14}+58 q^{12}+116 q^{10}-252 q^8+282 q^6-192 q^4+31 q^2+141-245 q^{-2} +261 q^{-4} -179 q^{-6} +57 q^{-8} +53 q^{-10} -121 q^{-12} +126 q^{-14} -87 q^{-16} +44 q^{-18} -2 q^{-20} -19 q^{-22} +24 q^{-24} -20 q^{-26} +10 q^{-28} -4 q^{-30} + q^{-32} }

.

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["9 40"];
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^3-7 t^2+18 t-23+18 t^{-1} -7 t^{-2} + t^{-3} }
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^6-z^4-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 \left\{t^2-3 t+1\right\}}
In[7]:= {KnotDet[K], KnotSignature[K]}
Out[7]= { 75, -2 }
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^2+5 q-8+11 q^{-1} -13 q^{-2} +13 q^{-3} -11 q^{-4} +8 q^{-5} -4 q^{-6} + q^{-7} }
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 z^2 a^6-2 z^4 a^4-2 z^2 a^4+a^4+z^6 a^2+2 z^4 a^2-2 a^2-z^4+2}
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 z^4 a^8+4 z^5 a^7-2 z^3 a^7+8 z^6 a^6-9 z^4 a^6+4 z^2 a^6+9 z^7 a^5-12 z^5 a^5+6 z^3 a^5-z a^5+4 z^8 a^4+7 z^6 a^4-20 z^4 a^4+7 z^2 a^4+a^4+17 z^7 a^3-32 z^5 a^3+14 z^3 a^3-z a^3+4 z^8 a^2+4 z^6 a^2-17 z^4 a^2+3 z^2 a^2+2 a^2+8 z^7 a-15 z^5 a+6 z^3 a+5 z^6-7 z^4+2+z^5 a^{-1} }

Vassiliev invariants

V2 and V3: (-1, 1)
V2,1 through V6,9:
V2,1 V3,1 V4,1 V4,2 V4,3 V5,1 V5,2 V5,3 V5,4 V6,1 V6,2 V6,3 V6,4 V6,5 V6,6 V6,7 V6,8 V6,9
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 -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 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 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 \frac{34}{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 \frac{38}{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 -32} 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 -\frac{208}{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 -\frac{160}{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 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 -\frac{32}{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 32} 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 -\frac{136}{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 -\frac{152}{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 \frac{2129}{30}} 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 \frac{2102}{15}} 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 -\frac{4742}{45}} 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 -\frac{113}{18}} 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 -\frac{751}{30}}

V2,1 through V6,9 were provided by Petr Dunin-Barkowski <barkovs@itep.ru>, Andrey Smirnov <asmirnov@itep.ru>, and Alexei Sleptsov <sleptsov@itep.ru> and uploaded on October 2010 by User:Drorbn. Note that they are normalized differently than V2 and V3.

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 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 r} ). The squares with yellow highlighting are those on the "critical diagonals", where 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-2r=s+1} or 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-2r=s-1} , where 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 s=} -2 is the signature of 9 40. Nonzero entries off the critical diagonals (if any exist) are highlighted in red.   
\ r
  \  
j \
 -6-5-4-3-2-10123χ
5         1-1
3        4 4
1       41 -3
-1      74  3
-3     75   -2
-5    66    0
-7   57     2
-9  36      -3
-11 15       4
-13 3        -3
-151         1
Integral Khovanov Homology

(db, data source)

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

Computer Talk

Much of the above data can be recomputed by Mathematica using the package KnotTheory`. See A Sample KnotTheory` Session.

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 \textrm{Include}(\textrm{ColouredJonesM.mhtml})} 

In[1]:=    
 
<< KnotTheory`
 
Loading KnotTheory` (version of August 17, 2005, 14:44:34)...
In[2]:=
Crossings[Knot[9, 40]]
Out[2]=  
9
In[3]:=
PD[Knot[9, 40]]
Out[3]=  
PD[X[1, 6, 2, 7], X[7, 12, 8, 13], X[5, 15, 6, 14], X[11, 3, 12, 2], 

 X[15, 10, 16, 11], X[3, 16, 4, 17], X[9, 4, 10, 5], X[17, 9, 18, 8], 



  X[13, 18, 14, 1]]
In[4]:=
GaussCode[Knot[9, 40]]
Out[4]=  
GaussCode[-1, 4, -6, 7, -3, 1, -2, 8, -7, 5, -4, 2, -9, 3, -5, 6, -8, 9]
In[5]:=
BR[Knot[9, 40]]
Out[5]=  
BR[4, {-1, 2, -1, -3, 2, -1, -3, 2, -3}]
In[6]:=
alex = Alexander[Knot[9, 40]][t]
Out[6]=  
       -3   7    18             2    3

-23 + t   - -- + -- + 18 t - 7 t  + t



            2   t


            t
In[7]:=
Conway[Knot[9, 40]][z]
Out[7]=  
     2    4    6
1 - z  - z  + z
In[8]:=
Select[AllKnots[], (alex === Alexander[#][t])&]
Out[8]=  
{Knot[9, 40], Knot[10, 59], Knot[11, NonAlternating, 66]}
In[9]:=
{KnotDet[Knot[9, 40]], KnotSignature[Knot[9, 40]]}
Out[9]=  
{75, -2}
In[10]:=
J=Jones[Knot[9, 40]][q]
Out[10]=  
      -7   4    8    11   13   13   11          2

-8 + q   - -- + -- - -- + -- - -- + -- + 5 q - q



           6    5    4    3    2   q


           q    q    q    q    q
In[11]:=
Select[AllKnots[], (J === Jones[#][q] || (J /. q-> 1/q) === Jones[#][q])&]
Out[11]=  
{Knot[9, 40]}
In[12]:=
A2Invariant[Knot[9, 40]][q]
Out[12]=  
     -22    -20    2     3     -14    2     -10   3     -6   4    3

1 + q    - q    - --- + --- - q    + --- + q    - -- + q   - -- + -- + 



                  18    16           12           8          4    2
                 q     q            q            q          q    q

    4    6


  3 q  - q
In[13]:=
Kauffman[Knot[9, 40]][a, z]
Out[13]=  
       2    4    3      5        2  2      4  2      6  2        3

2 + 2 a  + a  - a  z - a  z + 3 a  z  + 7 a  z  + 4 a  z  + 6 a z  + 



     3  3      5  3      7  3      4       2  4       4  4      6  4
 14 a  z  + 6 a  z  - 2 a  z  - 7 z  - 17 a  z  - 20 a  z  - 9 a  z  + 

          5
  8  4   z          5       3  5       5  5      7  5      6
 a  z  + -- - 15 a z  - 32 a  z  - 12 a  z  + 4 a  z  + 5 z  + 
         a

    2  6      4  6      6  6        7       3  7      5  7      2  8
 4 a  z  + 7 a  z  + 8 a  z  + 8 a z  + 17 a  z  + 9 a  z  + 4 a  z  + 

    4  8


  4 a  z
In[14]:=
{Vassiliev[2][Knot[9, 40]], Vassiliev[3][Knot[9, 40]]}
Out[14]=  
{0, 1}
In[15]:=
Kh[Knot[9, 40]][q, t]
Out[15]=  
5    7     1        3        1        5        3       6       5

-- + - + ------ + ------ + ------ + ------ + ----- + ----- + ----- + 



3   q    15  6    13  5    11  5    11  4    9  4    9  3    7  3



q        q   t    q   t    q   t    q   t    q  t    q  t    q  t



   7       6      6      7     4 t              2      3  2    5  3
 ----- + ----- + ---- + ---- + --- + 4 q t + q t  + 4 q  t  + q  t
  7  2    5  2    5      3      q


  q  t    q  t    q  t   q  t
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