#20719: HOMFLY polynomial of links.
-------------------------------------+-------------------------------------
Reporter: mmarco | Owner:
Type: enhancement | Status: needs_info
Priority: major | Milestone: sage-7.3
Component: algebraic | Resolution:
topology | Merged in:
Keywords: days74 | Reviewers: Travis Scrimshaw
Authors: Miguel Marco | Work issues:
Report Upstream: N/A | Commit:
Branch: | 6c452659bd47d880eb2e0fff90940e4ca28c42a5
u/tscrim/homfly_polynomial-20719 | Stopgaps:
Dependencies: #18057, #18047 |
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Changes (by tscrim):
* status: needs_review => needs_info
Comment:
We might have a problem:
{{{
sage: B = BraidGroup(3)
sage: K = Knot(B([-1,-1,-1,-1,-1,-1,-2,1,-2,-2])) # Knot 9_6
L^10*M^4 - L^8*M^6 - 3*L^10*M^2 + 4*L^8*M^4 + L^6*M^6 + L^10 - 3*L^8*M^2 -
5*L^6*M^4 - L^8 + 7*L^6*M^2 - 3*L^6
}}}
Some of the signs are wrong in this example. Nathan is thinking it might
possibly by a variable `a = -i M` and/or `b = -i L`, but still...
Also, I will add a description of the polynomial after the above issue
gets resolved.
--
Ticket URL: <http://trac.sagemath.org/ticket/20719#comment:7>
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