K11n18
From Knot Atlas
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 (Knotscape image) | See the full Hoste-Thistlethwaite Table of 11 Crossing Knots.
Visit K11n18's page at Knotilus! Visit K11n18's page at the original Knot Atlas! |
[edit] Knot presentations
| Planar diagram presentation | X4251 X8394 X10,6,11,5 X7,16,8,17 X2,9,3,10 X11,19,12,18 X13,21,14,20 X15,6,16,7 X17,1,18,22 X19,15,20,14 X21,13,22,12 |
| Gauss code | 1, -5, 2, -1, 3, 8, -4, -2, 5, -3, -6, 11, -7, 10, -8, 4, -9, 6, -10, 7, -11, 9 |
| Dowker-Thistlethwaite code | 4 8 10 -16 2 -18 -20 -6 -22 -14 -12 |
| A Braid Representative |
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| A Morse Link Presentation | 
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[edit] Three dimensional invariants
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[edit] Four dimensional invariants
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[edit] Polynomial invariants
| Alexander polynomial | 2t2−8t + 13−8t−1 + 2t−2 |
| Conway polynomial | 2z4 + 1 |
| 2nd Alexander ideal (db, data sources) | {1} |
| Determinant and Signature | { 33, 0 } |
| Jones polynomial | −q7 + 2q6−3q5 + 5q4−5q3 + 5q2−5q + 4−2q−1 + q−2 |
| HOMFLY-PT polynomial (db, data sources) | z4a−2 + z4a−4 + z2a−2 + 2z2a−4−z2a−6−2z2 + a2 + 2a−4−a−6−1 |
| Kauffman polynomial (db, data sources) | z9a−3 + z9a−5 + 2z8a−2 + 4z8a−4 + 2z8a−6 + 2z7a−1−z7a−3−2z7a−5 + z7a−7−6z6a−2−17z6a−4−10z6a−6 + z6−6z5a−1−6z5a−3−5z5a−5−5z5a−7 + 4z4a−2 + 21z4a−4 + 15z4a−6−2z4 + 2az3 + 6z3a−1 + 6z3a−3 + 9z3a−5 + 7z3a−7 + a2z2−z2a−2−12z2a−4−8z2a−6 + 4z2−az−za−1−za−3−3za−5−2za−7−a2 + 2a−4 + a−6−1 |
| The A2 invariant | Data:K11n18/QuantumInvariant/A2/1,0 |
| The G2 invariant | Data:K11n18/QuantumInvariant/G2/1,0 |
Further Quantum Invariants
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`
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Loading KnotTheory` version of August 31, 2006, 11:25:27.5625.
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In[3]:=
| K = Knot["K11n18"];
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In[4]:=
| Alexander[K][t]
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KnotTheory::loading: Loading precomputed data in PD4Knots`.
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Out[4]=
| 2t2−8t + 13−8t−1 + 2t−2 |
In[5]:=
| Conway[K][z]
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Out[5]=
| 2z4 + 1 |
In[6]:=
| Alexander[K, 2][t]
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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.
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Out[6]=
| {1} |
In[7]:=
| {KnotDet[K], KnotSignature[K]}
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Out[7]=
| { 33, 0 } |
In[8]:=
| Jones[K][q]
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KnotTheory::loading: Loading precomputed data in Jones4Knots`.
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Out[8]=
| −q7 + 2q6−3q5 + 5q4−5q3 + 5q2−5q + 4−2q−1 + q−2 |
In[9]:=
| HOMFLYPT[K][a, z]
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KnotTheory::credits: The HOMFLYPT program was written by Scott Morrison.
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Out[9]=
| z4a−2 + z4a−4 + z2a−2 + 2z2a−4−z2a−6−2z2 + a2 + 2a−4−a−6−1 |
In[10]:=
| Kauffman[K][a, z]
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KnotTheory::loading: Loading precomputed data in Kauffman4Knots`.
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Out[10]=
| z9a−3 + z9a−5 + 2z8a−2 + 4z8a−4 + 2z8a−6 + 2z7a−1−z7a−3−2z7a−5 + z7a−7−6z6a−2−17z6a−4−10z6a−6 + z6−6z5a−1−6z5a−3−5z5a−5−5z5a−7 + 4z4a−2 + 21z4a−4 + 15z4a−6−2z4 + 2az3 + 6z3a−1 + 6z3a−3 + 9z3a−5 + 7z3a−7 + a2z2−z2a−2−12z2a−4−8z2a−6 + 4z2−az−za−1−za−3−3za−5−2za−7−a2 + 2a−4 + a−6−1 |
[edit] "Similar" Knots (within the Atlas)
Same Alexander/Conway Polynomial: {10_146, K11n62,}
Same Jones Polynomial (up to mirroring, 
):
{}
Computer Talk
The above data is available with the Mathematica package
KnotTheory`. Your input (in red) is realistic; all else should have the same content as in a real mathematica session, but with different formatting.
(The path below may be different on your system, and possibly also the KnotTheory` date)
In[1]:=
| AppendTo[$Path, "C:/drorbn/projects/KAtlas/"];
<< KnotTheory`
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Loading KnotTheory` version of May 31, 2006, 14:15:20.091.
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In[3]:=
| K = Knot["K11n18"];
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In[4]:=
| {A = Alexander[K][t], J = Jones[K][q]}
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KnotTheory::loading: Loading precomputed data in PD4Knots`.
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KnotTheory::loading: Loading precomputed data in Jones4Knots`.
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Out[4]=
| { 2t2−8t + 13−8t−1 + 2t−2, −q7 + 2q6−3q5 + 5q4−5q3 + 5q2−5q + 4−2q−1 + q−2 } |
In[5]:=
| DeleteCases[Select[AllKnots[], (A === Alexander[#][t]) &], K]
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KnotTheory::loading: Loading precomputed data in DTCode4KnotsTo11`.
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KnotTheory::credits: The GaussCode to PD conversion was written by Siddarth Sankaran at the University of Toronto in the summer of 2005.
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Out[5]=
| {10_146, K11n62,} |
In[6]:=
| DeleteCases[
Select[
AllKnots[],
(J === Jones[#][q] || (J /. q -> 1/q) === Jones[#][q]) &
],
K
]
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KnotTheory::loading: Loading precomputed data in Jones4Knots11`.
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Out[6]=
| {} |
[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 = 0 is the signature of K11n18. Nonzero entries off the critical diagonals (if any exist) are highlighted in red. |
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| Integral Khovanov Homology
(db, data source) |
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[edit] Computer Talk
Much of the above data can be recomputed by Mathematica using the packageKnotTheory`. See A Sample KnotTheory` Session.
[edit] Modifying This Page
| Read me first: Modifying Knot Pages.
See/edit the Hoste-Thistlethwaite Knot Page master template (intermediate). See/edit the Hoste-Thistlethwaite_Splice_Base (expert). Back to the top. |
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