7 7: Difference between revisions

Revision as of 20:11, 28 August 2005

7_6

8_1

Visit 7 7's page at the Knot Server (KnotPlot driven, includes 3D interactive images!)

Visit 7 7's page at Knotilus!

Visit 7 7's page at the original Knot Atlas!

This is the Chinese crown loop of practical knot tying.

Ornamental knot

Mongolian ornament ; sum of two 7.7

Depiction with three loops

Sum of 4.1 and 7.7

Knot presentations

Planar diagram presentation	X₁₄₂₅ X_5,10,6,11 X₃₉₄₈ X_9,3,10,2 X_11,14,12,1 X_7,13,8,12 X_13,7,14,6
Gauss code	-1, 4, -3, 1, -2, 7, -6, 3, -4, 2, -5, 6, -7, 5
Dowker-Thistlethwaite code	4 8 10 12 2 14 6
Conway Notation	[21112]

Three dimensional invariants

Symmetry type	Reversible
Unknotting number	1
3-genus	2
Bridge index	2
Super bridge index	4
Nakanishi index	1
Maximal Thurston-Bennequin number	Failed to parse (syntax error): {\displaystyle \text{$\$$Failed}}
Hyperbolic Volume	7.64338
A-Polynomial	See Data:7 7/A-polynomial

[edit Notes for 7 7'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 2}
Rasmussen s-Invariant	0

[edit Notes for 7 7'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^2+ t^{-2} -5 t-5 t^{-1} +9}
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-z^2+1}
2nd Alexander ideal (db, data sources)	$\{1\}$
Determinant and Signature	{ 21, 0 }
Jones polynomial	$q^{4}-2q^{3}-q^{-3}+3q^{2}+3q^{-2}-4q-3q^{-1}+4$
HOMFLY-PT polynomial (db, data sources)	$a^{-4}-a^{2}z^{2}-2z^{2}a^{-2}-2a^{-2}+z^{4}+2z^{2}+2$
Kauffman polynomial (db, data sources)	$z^{4}a^{-4}-2z^{2}a^{-4}+a^{-4}+2z^{5}a^{-3}+a^{3}z^{3}-4z^{3}a^{-3}+2za^{-3}+z^{6}a^{-2}+3a^{2}z^{4}+2z^{4}a^{-2}-3a^{2}z^{2}-6z^{2}a^{-2}+2a^{-2}+3az^{5}+5z^{5}a^{-1}-3az^{3}-8z^{3}a^{-1}+az+3za^{-1}+z^{6}+4z^{4}-7z^{2}+2$
The A2 invariant	$-q^{10}+q^{8}+q^{6}+2q^{2}+q^{-2}-q^{-4}-q^{-6}-q^{-10}+q^{-12}+q^{-14}$
The G2 invariant	$q^{52}-2q^{50}+3q^{48}-4q^{46}+q^{42}-4q^{40}+9q^{38}-9q^{36}+9q^{34}-3q^{32}-4q^{30}+9q^{28}-10q^{26}+9q^{24}-5q^{22}-q^{20}+5q^{18}-4q^{16}+4q^{14}+2q^{12}-7q^{10}+10q^{8}-5q^{6}-2q^{4}+8q^{2}-12+17q^{-2}-11q^{-4}+5q^{-6}+3q^{-8}-9q^{-10}+15q^{-12}-14q^{-14}+6q^{-16}-q^{-18}-4q^{-20}+6q^{-22}-6q^{-24}+q^{-26}+3q^{-28}-7q^{-30}+5q^{-32}-4q^{-34}-5q^{-36}+10q^{-38}-11q^{-40}+9q^{-42}-4q^{-44}-q^{-46}+7q^{-48}-8q^{-50}+9q^{-52}-4q^{-54}+q^{-56}+q^{-58}-3q^{-60}+3q^{-62}-q^{-64}+q^{-66}$

Further Quantum Invariants

Further quantum knot invariants for 7_7.

A1 Invariants.

Weight	Invariant
1	$-q^{7}+2q^{5}+q-q^{-3}+q^{-5}-q^{-7}+q^{-9}$
2	$q^{20}-2q^{18}-2q^{16}+5q^{14}-q^{12}-3q^{10}+5q^{8}-3q^{4}+2q^{2}+1-q^{-2}-2q^{-4}+2q^{-6}+2q^{-8}-4q^{-10}+2q^{-12}+4q^{-14}-4q^{-16}+3q^{-20}-2q^{-22}-q^{-24}+q^{-26}$
3	$-q^{39}+2q^{37}+2q^{35}-3q^{33}-5q^{31}+q^{29}+10q^{27}-2q^{25}-11q^{23}+14q^{19}+3q^{17}-13q^{15}-5q^{13}+12q^{11}+6q^{9}-9q^{7}-5q^{5}+4q^{3}+6q-q^{-1}-5q^{-3}-4q^{-5}+5q^{-7}+7q^{-9}-2q^{-11}-9q^{-13}+3q^{-15}+13q^{-17}-q^{-19}-13q^{-21}-3q^{-23}+12q^{-25}+4q^{-27}-11q^{-29}-6q^{-31}+8q^{-33}+7q^{-35}-4q^{-37}-6q^{-39}+2q^{-41}+4q^{-43}-2q^{-47}-q^{-49}+q^{-51}$
4	$q^{64}-2q^{62}-2q^{60}+3q^{58}+3q^{56}+5q^{54}-8q^{52}-10q^{50}+2q^{48}+8q^{46}+20q^{44}-11q^{42}-26q^{40}-7q^{38}+15q^{36}+40q^{34}-3q^{32}-36q^{30}-25q^{28}+8q^{26}+50q^{24}+13q^{22}-30q^{20}-33q^{18}-4q^{16}+39q^{14}+19q^{12}-13q^{10}-26q^{8}-13q^{6}+18q^{4}+16q^{2}+5-10q^{-2}-15q^{-4}-4q^{-6}+14q^{-8}+21q^{-10}+q^{-12}-18q^{-14}-23q^{-16}+10q^{-18}+30q^{-20}+10q^{-22}-19q^{-24}-40q^{-26}+4q^{-28}+37q^{-30}+22q^{-32}-11q^{-34}-46q^{-36}-8q^{-38}+29q^{-40}+30q^{-42}+6q^{-44}-38q^{-46}-19q^{-48}+10q^{-50}+25q^{-52}+18q^{-54}-19q^{-56}-18q^{-58}-6q^{-60}+10q^{-62}+16q^{-64}-3q^{-66}-6q^{-68}-6q^{-70}+6q^{-74}+q^{-76}-2q^{-80}-q^{-82}+q^{-84}$
5	$-q^{95}+2q^{93}+2q^{91}-3q^{89}-3q^{87}-3q^{85}+2q^{83}+8q^{81}+10q^{79}-2q^{77}-17q^{75}-17q^{73}+23q^{69}+30q^{67}+14q^{65}-34q^{63}-58q^{61}-23q^{59}+36q^{57}+77q^{55}+55q^{53}-31q^{51}-102q^{49}-82q^{47}+17q^{45}+108q^{43}+113q^{41}+9q^{39}-107q^{37}-128q^{35}-35q^{33}+93q^{31}+132q^{29}+55q^{27}-69q^{25}-125q^{23}-67q^{21}+42q^{19}+102q^{17}+69q^{15}-16q^{13}-77q^{11}-64q^{9}-q^{7}+48q^{5}+58q^{3}+23q-26q^{-1}-45q^{-3}-34q^{-5}+42q^{-9}+51q^{-11}+15q^{-13}-37q^{-15}-62q^{-17}-35q^{-19}+34q^{-21}+80q^{-23}+47q^{-25}-34q^{-27}-93q^{-29}-65q^{-31}+28q^{-33}+104q^{-35}+86q^{-37}-20q^{-39}-110q^{-41}-100q^{-43}+4q^{-45}+107q^{-47}+116q^{-49}+20q^{-51}-96q^{-53}-120q^{-55}-42q^{-57}+69q^{-59}+117q^{-61}+62q^{-63}-39q^{-65}-103q^{-67}-76q^{-69}+8q^{-71}+77q^{-73}+76q^{-75}+18q^{-77}-46q^{-79}-67q^{-81}-32q^{-83}+21q^{-85}+48q^{-87}+34q^{-89}-27q^{-93}-29q^{-95}-8q^{-97}+12q^{-99}+17q^{-101}+8q^{-103}-2q^{-105}-8q^{-107}-8q^{-109}+4q^{-113}+3q^{-115}+q^{-117}-2q^{-121}-q^{-123}+q^{-125}$
6	$q^{132}-2q^{130}-2q^{128}+3q^{126}+3q^{124}+3q^{122}-4q^{120}-2q^{118}-8q^{116}-10q^{114}+11q^{112}+17q^{110}+17q^{108}-3q^{106}-12q^{104}-38q^{102}-37q^{100}+16q^{98}+54q^{96}+68q^{94}+21q^{92}-17q^{90}-106q^{88}-127q^{86}-23q^{84}+94q^{82}+180q^{80}+132q^{78}+31q^{76}-176q^{74}-281q^{72}-165q^{70}+57q^{68}+278q^{66}+310q^{64}+191q^{62}-145q^{60}-391q^{58}-355q^{56}-98q^{54}+250q^{52}+416q^{50}+368q^{48}+q^{46}-350q^{44}-444q^{42}-259q^{40}+103q^{38}+359q^{36}+422q^{34}+145q^{32}-189q^{30}-364q^{28}-299q^{26}-42q^{24}+198q^{22}+329q^{20}+191q^{18}-30q^{16}-198q^{14}-226q^{12}-114q^{10}+43q^{8}+179q^{6}+161q^{4}+69q^{2}-54-129q^{-2}-134q^{-4}-59q^{-6}+56q^{-8}+125q^{-10}+134q^{-12}+44q^{-14}-69q^{-16}-159q^{-18}-135q^{-20}-25q^{-22}+128q^{-24}+209q^{-26}+120q^{-28}-47q^{-30}-215q^{-32}-220q^{-34}-90q^{-36}+155q^{-38}+306q^{-40}+212q^{-42}-20q^{-44}-271q^{-46}-319q^{-48}-181q^{-50}+147q^{-52}+378q^{-54}+320q^{-56}+61q^{-58}-264q^{-60}-389q^{-62}-305q^{-64}+49q^{-66}+357q^{-68}+396q^{-70}+196q^{-72}-141q^{-74}-356q^{-76}-391q^{-78}-111q^{-80}+209q^{-82}+362q^{-84}+297q^{-86}+50q^{-88}-193q^{-90}-355q^{-92}-227q^{-94}+3q^{-96}+197q^{-98}+267q^{-100}+174q^{-102}+4q^{-104}-194q^{-106}-205q^{-108}-117q^{-110}+17q^{-112}+126q^{-114}+154q^{-116}+97q^{-118}-36q^{-120}-88q^{-122}-98q^{-124}-54q^{-126}+8q^{-128}+61q^{-130}+72q^{-132}+20q^{-134}-6q^{-136}-31q^{-138}-33q^{-140}-20q^{-142}+6q^{-144}+22q^{-146}+11q^{-148}+8q^{-150}-2q^{-152}-7q^{-154}-10q^{-156}-2q^{-158}+4q^{-160}+q^{-162}+3q^{-164}+q^{-166}-2q^{-170}-q^{-172}+q^{-174}$

A2 Invariants.

Weight	Invariant
1,0	$-q^{10}+q^{8}+q^{6}+2q^{2}+q^{-2}-q^{-4}-q^{-6}-q^{-10}+q^{-12}+q^{-14}$
1,1	$q^{28}-4q^{26}+8q^{24}-12q^{22}+18q^{20}-28q^{18}+30q^{16}-30q^{14}+30q^{12}-18q^{10}+12q^{8}+10q^{6}-23q^{4}+38q^{2}-52+54q^{-2}-60q^{-4}+52q^{-6}-44q^{-8}+30q^{-10}-11q^{-12}+2q^{-14}+16q^{-16}-24q^{-18}+31q^{-20}-30q^{-22}+26q^{-24}-24q^{-26}+15q^{-28}-10q^{-30}+6q^{-32}-2q^{-34}+q^{-36}$
2,0	$q^{26}-q^{24}-2q^{22}+2q^{18}+q^{16}-3q^{14}+2q^{12}+4q^{10}+q^{8}-q^{6}+2q^{4}+q^{2}-1-q^{-2}-q^{-4}-2q^{-6}-2q^{-8}+2q^{-10}-q^{-14}+3q^{-16}+4q^{-18}-q^{-22}+q^{-24}+q^{-26}-2q^{-28}-3q^{-30}+q^{-34}+q^{-36}$
3,0	$-q^{48}+q^{46}+2q^{44}+q^{42}-2q^{40}-6q^{38}+q^{36}+4q^{34}+5q^{32}-4q^{30}-11q^{28}+10q^{24}+12q^{22}-4q^{20}-11q^{18}+11q^{14}+8q^{12}-4q^{10}-8q^{8}+q^{6}+4q^{4}+q^{2}-5-4q^{-2}-q^{-4}-2q^{-6}-3q^{-8}+8q^{-12}+5q^{-14}-q^{-18}+8q^{-20}+11q^{-22}-2q^{-24}-11q^{-26}-7q^{-28}+5q^{-30}+7q^{-32}-6q^{-34}-11q^{-36}-5q^{-38}+6q^{-40}+10q^{-42}-4q^{-46}-4q^{-48}+4q^{-50}+7q^{-52}+2q^{-54}-2q^{-56}-5q^{-58}-2q^{-60}+q^{-64}+q^{-66}$

A3 Invariants.

Weight	Invariant
0,1,0	$q^{22}-2q^{20}-q^{18}+3q^{16}-3q^{14}+q^{12}+5q^{10}-q^{8}+3q^{4}-q^{2}-1+q^{-4}-2q^{-8}+3q^{-10}+q^{-12}-4q^{-14}+2q^{-16}+q^{-18}-3q^{-20}+2q^{-22}+q^{-24}-q^{-26}+q^{-28}$
1,0,0	$-q^{13}+q^{11}+q^{7}+2q^{3}+q+q^{-1}+q^{-3}-q^{-5}-q^{-7}-2q^{-9}-q^{-13}+q^{-15}+q^{-17}+q^{-19}$

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^{28}-q^{26}-2 q^{24}+q^{22}+q^{20}-2 q^{18}-q^{16}+4 q^{14}+3 q^{12}+2 q^8+6 q^6-2 q^2+1-2 q^{-2} -5 q^{-4} - q^{-6} + q^{-8} - q^{-10} + q^{-12} +5 q^{-14} +3 q^{-16} -2 q^{-18} +2 q^{-22} -2 q^{-24} -3 q^{-26} + q^{-30} + q^{-36} + q^{-38} }

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^{16}+q^{14}+q^8+2 q^4+q^2+2+ q^{-2} + q^{-4} - q^{-6} - q^{-8} -2 q^{-10} -2 q^{-12} - q^{-16} + q^{-18} + q^{-20} + q^{-22} + q^{-24} }

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^{22}+2 q^{20}-3 q^{18}+3 q^{16}-3 q^{14}+3 q^{12}-q^{10}+q^8+2 q^6-q^4+5 q^2-5+6 q^{-2} -5 q^{-4} +4 q^{-6} -4 q^{-8} + q^{-10} - q^{-12} -2 q^{-14} +2 q^{-16} -3 q^{-18} +3 q^{-20} -2 q^{-22} +3 q^{-24} - q^{-26} + q^{-28} }

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^{36}-2 q^{32}-2 q^{30}+q^{28}+3 q^{26}-3 q^{22}-q^{20}+4 q^{18}+3 q^{16}-2 q^{12}+q^{10}+2 q^8+q^6-3 q^4-q^2+2+ q^{-2} -2 q^{-4} -2 q^{-6} + q^{-8} +2 q^{-10} -2 q^{-14} + q^{-16} +3 q^{-18} + q^{-20} -3 q^{-22} -2 q^{-24} +2 q^{-26} +3 q^{-28} - q^{-30} -3 q^{-32} - q^{-34} +2 q^{-36} +2 q^{-38} - q^{-40} - q^{-42} + q^{-46} }

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^{30}-2 q^{28}+q^{26}-2 q^{24}+3 q^{22}-3 q^{20}+2 q^{18}-q^{16}+3 q^{14}+q^{12}+q^8+4 q^4-3 q^2+4-4 q^{-2} +5 q^{-4} -3 q^{-6} +3 q^{-8} -4 q^{-10} +2 q^{-12} - q^{-14} - q^{-18} -2 q^{-20} +2 q^{-22} -2 q^{-24} +2 q^{-26} -2 q^{-28} +3 q^{-30} - q^{-32} +2 q^{-34} - q^{-36} + q^{-38} }

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^{52}-2 q^{50}+3 q^{48}-4 q^{46}+q^{42}-4 q^{40}+9 q^{38}-9 q^{36}+9 q^{34}-3 q^{32}-4 q^{30}+9 q^{28}-10 q^{26}+9 q^{24}-5 q^{22}-q^{20}+5 q^{18}-4 q^{16}+4 q^{14}+2 q^{12}-7 q^{10}+10 q^8-5 q^6-2 q^4+8 q^2-12+17 q^{-2} -11 q^{-4} +5 q^{-6} +3 q^{-8} -9 q^{-10} +15 q^{-12} -14 q^{-14} +6 q^{-16} - q^{-18} -4 q^{-20} +6 q^{-22} -6 q^{-24} + q^{-26} +3 q^{-28} -7 q^{-30} +5 q^{-32} -4 q^{-34} -5 q^{-36} +10 q^{-38} -11 q^{-40} +9 q^{-42} -4 q^{-44} - q^{-46} +7 q^{-48} -8 q^{-50} +9 q^{-52} -4 q^{-54} + q^{-56} + 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.

In[3]:= K = Knot["7 7"];

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+ t^{-2} -5 t-5 t^{-1} +9}

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-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]= $\{1\}$

In[7]:= {KnotDet[K], KnotSignature[K]}

Out[7]= { 21, 0 }

In[8]:= Jones[K][q]

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

Out[8]= $q^{4}-2q^{3}-q^{-3}+3q^{2}+3q^{-2}-4q-3q^{-1}+4$

In[9]:= HOMFLYPT[K][a, z]

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

Out[9]= $a^{-4}-a^{2}z^{2}-2z^{2}a^{-2}-2a^{-2}+z^{4}+2z^{2}+2$

In[10]:= Kauffman[K][a, z]

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

Out[10]= $z^{4}a^{-4}-2z^{2}a^{-4}+a^{-4}+2z^{5}a^{-3}+a^{3}z^{3}-4z^{3}a^{-3}+2za^{-3}+z^{6}a^{-2}+3a^{2}z^{4}+2z^{4}a^{-2}-3a^{2}z^{2}-6z^{2}a^{-2}+2a^{-2}+3az^{5}+5z^{5}a^{-1}-3az^{3}-8z^{3}a^{-1}+az+3za^{-1}+z^{6}+4z^{4}-7z^{2}+2$

Vassiliev invariants

V₂ and V₃:

(-1, -1)

V_2,1 through V_6,9:

V_2,1

V_3,1

V_4,1

V_4,2

V_4,3

V_5,1

V_5,2

V_5,3

V_5,4

V_6,1

V_6,2

V_6,3

V_6,4

V_6,5

V_6,6

V_6,7

V_6,8

V_6,9

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}

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{14}{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{10}{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{112}{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{64}{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{56}{3}}

{\frac {40}{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{2849}{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{218}{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{3418}{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{161}{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{449}{30}}

V_2,1 through V_6,9 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=} 0 is the signature of 7 7. Nonzero entries off the critical diagonals (if any exist) are highlighted in red.

\		r
	\
j		\

-3

-2

-1

0

1

2

3

4

χ

9

1

7

1

-1

5

2

1

3

2

1

-1

1

2

0

-1

2

3

1

-3

1

0

-5

2

-7

1

-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=-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 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=-3}	${\mathbb {Z} }$
$r=-2$	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}^{2}\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=-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}\oplus{\mathbb Z}_2^{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}^{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 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}^{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}^{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 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}^{2}\oplus{\mathbb Z}_2^{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}^{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 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^{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}^{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 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}\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}_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[7, 7]]
Out[2]=	7
In[3]:=	PD[Knot[7, 7]]
Out[3]=	PD[X[1, 4, 2, 5], X[5, 10, 6, 11], X[3, 9, 4, 8], X[9, 3, 10, 2], X[11, 14, 12, 1], X[7, 13, 8, 12], X[13, 7, 14, 6]]
In[4]:=	GaussCode[Knot[7, 7]]
Out[4]=	GaussCode[-1, 4, -3, 1, -2, 7, -6, 3, -4, 2, -5, 6, -7, 5]
In[5]:=	BR[Knot[7, 7]]
Out[5]=	BR[4, {1, -2, 1, -2, 3, -2, 3}]
In[6]:=	alex = Alexander[Knot[7, 7]][t]
Out[6]=	-2 5 2 9 + t - - - 5 t + t t
In[7]:=	Conway[Knot[7, 7]][z]
Out[7]=	2 4 1 - z + z
In[8]:=	Select[AllKnots[], (alex === Alexander[#][t])&]
Out[8]=	{Knot[7, 7], Knot[11, NonAlternating, 28]}
In[9]:=	{KnotDet[Knot[7, 7]], KnotSignature[Knot[7, 7]]}
Out[9]=	{21, 0}
In[10]:=	J=Jones[Knot[7, 7]][q]
Out[10]=	-3 3 3 2 3 4 4 - q + -- - - - 4 q + 3 q - 2 q + q 2 q q
In[11]:=	Select[AllKnots[], (J === Jones[#][q] \|\| (J /. q-> 1/q) === Jones[#][q])&]
Out[11]=	{Knot[7, 7]}
In[12]:=	A2Invariant[Knot[7, 7]][q]
Out[12]=	-10 -8 -6 2 2 4 6 10 12 14 -q + q + q + -- + q - q - q - q + q + q 2 q
In[13]:=	Kauffman[Knot[7, 7]][a, z]
Out[13]=	2 2 3 -4 2 2 z 3 z 2 2 z 6 z 2 2 4 z 2 + a + -- + --- + --- + a z - 7 z - ---- - ---- - 3 a z - ---- - 2 3 a 4 2 3 a a a a a 3 4 4 5 5 8 z 3 3 3 4 z 2 z 2 4 2 z 5 z ---- - 3 a z + a z + 4 z + -- + ---- + 3 a z + ---- + ---- + a 4 2 3 a a a a 6 5 6 z 3 a z + z + -- 2 a
In[14]:=	{Vassiliev[2][Knot[7, 7]], Vassiliev[3][Knot[7, 7]]}
Out[14]=	{0, -1}
In[15]:=	Kh[Knot[7, 7]][q, t]
Out[15]=	3 1 2 1 1 2 3 3 2 - + 2 q + ----- + ----- + ----- + ---- + --- + 2 q t + 2 q t + q t + q 7 3 5 2 3 2 3 q t q t q t q t q t 5 2 5 3 7 3 9 4 2 q t + q t + q t + q t

@@ Line 1: / Line 1: @@
 <!--  -->
+<!-- -->
+<!--  -->
+<!-- -->
 <!-- provide an anchor so we can return to the top of the page -->
 <span id="top"></span>
+<!-- -->
 <!-- this relies on transclusion for next and previous links -->
 {{Knot Navigation Links|ext=gif}}
+{{Rolfsen Knot Page Header|n=7|k=7|KnotilusURL=http://srankin.math.uwo.ca/cgi-bin/retrieve.cgi/-1,4,-3,1,-2,7,-6,3,-4,2,-5,6,-7,5/goTop.html}}
-{| align=left
-|- valign=top
-|[[Image:{{PAGENAME}}.gif]]
-|{{Rolfsen Knot Site Links|n=7|k=7|KnotilusURL=http://srankin.math.uwo.ca/cgi-bin/retrieve.cgi/-1,4,-3,1,-2,7,-6,3,-4,2,-5,6,-7,5/goTop.html}}
-|{{:{{PAGENAME}} Quick Notes}}
-|}
 <br style="clear:both" />
@@ Line 24: / Line 21: @@
 {{Vassiliev Invariants}}
-===[[Khovanov Homology]]===
+{{Khovanov Homology|table=<table border=1>
-The coefficients of the monomials <math>t^rq^j</math> are shown, along with their alternating sums <math>\chi</math> (fixed <math>j</math>, alternation over <math>r</math>). The squares with <font class=HLYellow>yellow</font> highlighting are those on the "critical diagonals", where <math>j-2r=s+1</math> or <math>j-2r=s+1</math>, where <math>s=</math>{{Data:{{PAGENAME}}/Signature}} is the signature of {{PAGENAME}}. Nonzero entries off the critical diagonals (if any exist) are highlighted in <font class=HLRed>red</font>.
-<center><table border=1>
 <tr align=center>
 <td width=16.6667%><table cellpadding=0 cellspacing=0>
@@ Line 45: / Line 38: @@
 <tr align=center><td>-5</td><td bgcolor=yellow>&nbsp;</td><td bgcolor=yellow>2</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>2</td></tr>
 <tr align=center><td>-7</td><td bgcolor=yellow>1</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>-1</td></tr>
-</table></center>
+</table>}}
 {{Computer Talk Header}}
@@ Line 118: / Line 110: @@
 q  t  + q  t  + q  t  + q  t</nowiki></pre></td></tr>
 </table>
+ [[Category:Knot Page]]

7 7: Difference between revisions

Revision as of 20:11, 28 August 2005

Contents

Knot presentations

Three dimensional invariants

Four dimensional invariants

Polynomial invariants

Vassiliev invariants

Khovanov Homology

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