9 12

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Image:9 12.gif
(KnotPlot image)

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[edit] Knot presentations

Planar diagram presentation X1425 X3,10,4,11 X5,16,6,17 X11,1,12,18 X17,13,18,12 X7,14,8,15 X13,8,14,9 X15,6,16,7 X9,2,10,3
Gauss code -1, 9, -2, 1, -3, 8, -6, 7, -9, 2, -4, 5, -7, 6, -8, 3, -5, 4
Dowker-Thistlethwaite code 4 10 16 14 2 18 8 6 12
Conway Notation [4212]


Minimum Braid Representative A Morse Link Presentation An Arc Presentation
Image:BraidPart3.gifImage:BraidPart3.gifImage:BraidPart0.gifImage:BraidPart3.gifImage:BraidPart0.gifImage:BraidPart0.gifImage:BraidPart0.gifImage:BraidPart0.gifImage:BraidPart0.gif
Image:BraidPart4.gifImage:BraidPart4.gifImage:BraidPart1.gifImage:BraidPart4.gifImage:BraidPart1.gifImage:BraidPart0.gifImage:BraidPart0.gifImage:BraidPart0.gifImage:BraidPart0.gif
Image:BraidPart0.gifImage:BraidPart0.gifImage:BraidPart2.gifImage:BraidPart3.gifImage:BraidPart2.gifImage:BraidPart3.gifImage:BraidPart0.gifImage:BraidPart1.gifImage:BraidPart0.gif
Image:BraidPart0.gifImage:BraidPart0.gifImage:BraidPart0.gifImage:BraidPart4.gifImage:BraidPart0.gifImage:BraidPart4.gifImage:BraidPart3.gifImage:BraidPart2.gifImage:BraidPart3.gif
Image:BraidPart0.gifImage:BraidPart0.gifImage:BraidPart0.gifImage:BraidPart0.gifImage:BraidPart0.gifImage:BraidPart0.gifImage:BraidPart4.gifImage:BraidPart0.gifImage:BraidPart4.gif

Length is 10, width is 5,

Braid index is 5

Image:9 12_ML.gif Image:9 12_AP.gif
[{12, 2}, {1, 10}, {6, 11}, {10, 12}, {9, 3}, {2, 8}, {7, 9}, {8, 6}, {4, 7}, {3, 5}, {11, 4}, {5, 1}]

[edit Notes on presentations of 9 12]


[edit] Three dimensional invariants

Symmetry type Reversible
Unknotting number 1
3-genus 2
Bridge index 2
Super bridge index {4,6}
Nakanishi index 1
Maximal Thurston-Bennequin number [-10][-1]
Hyperbolic Volume 8.83664
A-Polynomial See Data:9 12/A-polynomial

[edit Notes for 9 12's three dimensional invariants]

[edit] Four dimensional invariants

Smooth 4 genus 1
Topological 4 genus 1
Concordance genus 2
Rasmussen s-Invariant -2

[edit Notes for 9 12's four dimensional invariants]

[edit] Polynomial invariants

Alexander polynomial −2t2 + 9t−13 + 9t−1−2t−2
Conway polynomial −2z4 + z2 + 1
2nd Alexander ideal (db, data sources) {1}
Determinant and Signature { 35, -2 }
Jones polynomial q−2 + 4q−1−5q−2 + 6q−3−6q−4 + 5q−5−3q−6 + 2q−7q−8
HOMFLY-PT polynomial (db, data sources) a8 + 2z2a6 + 2a6z4a4z2a4a4z4a2z2a2 + z2 + 1
Kauffman polynomial (db, data sources) z5a9−3z3a9 + za9 + 2z6a8−6z4a8 + 4z2a8a8 + 2z7a7−5z5a7 + 3z3a7za7 + z8a6−5z4a6 + 7z2a6−2a6 + 4z7a5−11z5a5 + 13z3a5−4za5 + z8a4z4a4 + 3z2a4a4 + 2z7a3−3z5a3 + 4z3a3−2za3 + 2z6a2z4a2−2z2a2 + 2z5a−3z3a + z4−2z2 + 1
The A2 invariant q26q24 + q22 + q18 + 2q16q14q10 + q6q4 + 2q2 + q−4
The G2 invariant q128q126 + 2q124−3q122 + 2q120−2q118−2q116 + 7q114−10q112 + 10q110−10q108 + 4q106 + 4q104−15q102 + 20q100−20q98 + 14q96q94−12q92 + 19q90−18q88 + 15q86−3q84−10q82 + 14q80−11q78 + 2q76 + 10q74−16q72 + 18q70−8q68−4q66 + 17q64−26q62 + 29q60−21q58 + 6q56 + 11q54−23q52 + 30q50−25q48 + 13q46−13q42 + 16q40−14q38 + 3q36 + 8q34−13q32 + 10q30−2q28−9q26 + 17q24−19q22 + 15q20−6q18−5q16 + 14q14−16q12 + 17q10−10q8 + 5q6 + q4−7q2 + 9−8q−2 + 7q−4−3q−6 + q−8 + 2q−10−3q−12 + 3q−14q−16 + q−18

[edit] "Similar" Knots (within the Atlas)

Same Alexander/Conway Polynomial: {K11n84,}

Same Jones Polynomial (up to mirroring, q\leftrightarrow q^{-1}): {K11n15,}

[edit] Vassiliev invariants

V2 and V3: (1, -3)

[edit] Khovanov Homology

The coefficients of the monomials trqj are shown, along with their alternating sums χ (fixed j, alternation over r). The squares with yellow highlighting are those on the "critical diagonals", where j−2r = s + 1 or j−2r = s−1, where s = -2 is the signature of 9 12. Nonzero entries off the critical diagonals (if any exist) are highlighted in red.   
\ r
  \  
j \
-7-6-5-4-3-2-1012χ
3         11
1        1 -1
-1       31 2
-3      32  -1
-5     32   1
-7    33    0
-9   23     -1
-11  13      2
-13 12       -1
-15 1        1
-171         -1
Integral Khovanov Homology

(db, data source)

  
\dim{\mathcal G}_{2r+i}\operatorname{KH}^r_{\mathbb Z} i = −3 i = −1
r = −7 {\mathbb Z}
r = −6 {\mathbb Z}\oplus{\mathbb Z}_2 {\mathbb Z}
r = −5 {\mathbb Z}^{2}\oplus{\mathbb Z}_2 {\mathbb Z}
r = −4 {\mathbb Z}^{3}\oplus{\mathbb Z}_2^{2} {\mathbb Z}^{2}
r = −3 {\mathbb Z}^{3}\oplus{\mathbb Z}_2^{3} {\mathbb Z}^{3}
r = −2 {\mathbb Z}^{3}\oplus{\mathbb Z}_2^{3} {\mathbb Z}^{3}
r = −1 {\mathbb Z}^{2}\oplus{\mathbb Z}_2^{3} {\mathbb Z}^{3}
r = 0 {\mathbb Z}^{2}\oplus{\mathbb Z}_2^{2} {\mathbb Z}^{3}
r = 1 {\mathbb Z}\oplus{\mathbb Z}_2 {\mathbb Z}
r = 2 {\mathbb Z}_2 {\mathbb Z}

[edit] The Coloured Jones Polynomials

[edit] Computer Talk

Much of the above data can be recomputed by Mathematica using the package KnotTheory`. See A Sample KnotTheory` Session, or any of the Computer Talk sections above.

[edit] Modifying This Page

Read me first: Modifying Knot Pages

See/edit the Rolfsen Knot Page master template (intermediate).

See/edit the Rolfsen_Splice_Base (expert).

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