Whitehead link |
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J.H.C. Whitehead spent much of the 1930s looking for a proof of the Poincaré conjecture. In a 1934 attempt at a proof, the Whitehead link was created as a disproval by counterexample.
=Structure=
The link is created with two projections of the is 0.
In braid theory notation, the link is written
:sigma^2_1sigma^2_2sigma^{-1}_1sigma^{-2}_2.,
Its Jones polynomial is
:V(t)=t^{- {3 over 2}}(-1+t-2t^2+t^3-2t^4+t^5).
=References=
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