7 5

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Image:7 5.gif
(KnotPlot image)

See the full Rolfsen Knot Table.

Visit 7 5's page at the Knot Server (KnotPlot driven, includes 3D interactive images!)

Visit [http://srankin.math.uwo.ca/cgi-bin/retrieve.cgi/-1,7,-2,1,-3,5,-4,6,-7,2,-6,3,-5,4/goTop.html 7_5's page] at Knotilus!

Visit 7 5's page at the original Knot Atlas!


[edit] Knot presentations

Planar diagram presentation X1425 X3,10,4,11 X5,12,6,13 X7,14,8,1 X13,6,14,7 X11,8,12,9 X9,2,10,3
Gauss code -1, 7, -2, 1, -3, 5, -4, 6, -7, 2, -6, 3, -5, 4
Dowker-Thistlethwaite code 4 10 12 14 2 8 6
Conway Notation [322]


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

Length is 8, width is 3,

Braid index is 3

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

[edit Notes on presentations of 7 5]

Knot 7_5.
Knot 7_5.
A graph, knot 7_5.
A graph, knot 7_5.

[edit] Three dimensional invariants

Symmetry type Reversible
Unknotting number 2
3-genus 2
Bridge index 2
Super bridge index 4
Nakanishi index 1
Maximal Thurston-Bennequin number Failed to parse (unknown error\text): \text{$\$$Failed}
Hyperbolic Volume 6.44354
A-Polynomial See Data:7 5/A-polynomial

[edit Notes for 7 5's three dimensional invariants]

[edit] Four dimensional invariants

Smooth 4 genus 2
Topological 4 genus 2
Concordance genus ConcordanceGenus(Knot(7,5))
Rasmussen s-Invariant -4

[edit Notes for 7 5's four dimensional invariants]

[edit] Polynomial invariants

Alexander polynomial 2t2−4t + 5−4t−1 + 2t−2
Conway polynomial 2z4 + 4z2 + 1
2nd Alexander ideal (db, data sources) {1}
Determinant and Signature { 17, -4 }
Jones polynomial q−9 + 2q−8−3q−7 + 3q−6−3q−5 + 3q−4q−3 + q−2
HOMFLY-PT polynomial (db, data sources) a^8 \left(-z^2\right)-a^8+a^6 z^4+2 a^6 z^2+a^4 z^4+3 a^4 z^2+2 a^4
Kauffman polynomial (db, data sources) a11z3a11z + 2a10z4−2a10z2 + 2a9z5−2a9z3 + a9z + a8z6 + a8z2a8 + 3a7z5−4a7z3 + a7z + a6z6a6z4 + a5z5a5z3a5z + a4z4−3a4z2 + 2a4
The A2 invariant q28q22q18 + q16 + q14 + q12 + 2q10 + q6
The G2 invariant q148q146 + 2q144−2q142 + q138−2q136 + 5q134−5q132 + 4q130−2q128−3q126 + 4q124−6q122 + 5q120−3q118q116 + 3q114−3q112 + q110 + 2q108−5q106 + 4q104−3q102−2q100 + 5q98−7q96 + 8q94−7q92 + 2q90 + 2q88−6q86 + 6q84−7q82 + 4q80−2q76 + 3q74−3q72 + 2q70 + 3q68−5q66 + 3q64−2q60 + 7q58−5q56 + 5q54q52 + 4q48−4q46 + 5q44q42 + q40 + q38q36 + 2q34 + q30

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

Same Alexander/Conway Polynomial: {10_130,}

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

[edit] Vassiliev invariants

V2 and V3: (4, -8)
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
16 −64 128 \frac{968}{3} \frac{136}{3} −1024 -\frac{5440}{3} -\frac{928}{3} −224 \frac{2048}{3} 2048 \frac{15488}{3} \frac{2176}{3} \frac{156422}{15} \frac{5912}{15} \frac{170888}{45} \frac{730}{9} \frac{7142}{15}

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.

[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 = -4 is the signature of 7 5. Nonzero entries off the critical diagonals (if any exist) are highlighted in red.    <table border=1> <tr align=center> <td width=16.6667%><table cellpadding=0 cellspacing=0> <tr><td>\</td><td> </td><td>r</td></tr> <tr><td> </td><td> \ </td><td> </td></tr> <tr><td>j</td><td> </td><td>\</td></tr> </table></td> <td width=8.33333%>-7</td><td width=8.33333%>-6</td><td width=8.33333%>-5</td><td width=8.33333%>-4</td><td width=8.33333%>-3</td><td width=8.33333%>-2</td><td width=8.33333%>-1</td><td width=8.33333%>0</td><td width=16.6667%>χ</td></tr> <tr align=center><td>-3</td><td> </td><td> </td><td> </td><td> </td><td> </td><td> </td><td> </td><td bgcolor=yellow>1</td><td>1</td></tr> <tr align=center><td>-5</td><td> </td><td> </td><td> </td><td> </td><td> </td><td> </td><td bgcolor=yellow>1</td><td bgcolor=yellow>1</td><td>0</td></tr> <tr align=center><td>-7</td><td> </td><td> </td><td> </td><td> </td><td> </td><td bgcolor=yellow>2</td><td bgcolor=yellow> </td><td> </td><td>2</td></tr> <tr align=center><td>-9</td><td> </td><td> </td><td> </td><td> </td><td bgcolor=yellow>1</td><td bgcolor=yellow>1</td><td> </td><td> </td><td>0</td></tr> <tr align=center><td>-11</td><td> </td><td> </td><td> </td><td bgcolor=yellow>2</td><td bgcolor=yellow>2</td><td> </td><td> </td><td> </td><td>0</td></tr> <tr align=center><td>-13</td><td> </td><td> </td><td bgcolor=yellow>1</td><td bgcolor=yellow>1</td><td> </td><td> </td><td> </td><td> </td><td>0</td></tr> <tr align=center><td>-15</td><td> </td><td bgcolor=yellow>1</td><td bgcolor=yellow>2</td><td> </td><td> </td><td> </td><td> </td><td> </td><td>-1</td></tr> <tr align=center><td>-17</td><td bgcolor=yellow> </td><td bgcolor=yellow>1</td><td> </td><td> </td><td> </td><td> </td><td> </td><td> </td><td>1</td></tr> <tr align=center><td>-19</td><td bgcolor=yellow>1</td><td> </td><td> </td><td> </td><td> </td><td> </td><td> </td><td> </td><td>-1</td></tr> </table>
Integral Khovanov Homology

(db, data source)

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