= Unreduced Jones polynomial
{c}
{title2=$V_L^{\mathrm{un}}(t)=-(t^{1/2}+t^{-1/2})V_L^{\mathrm{red}}(t)$}
Use the <Kauffman bracket> assigning the empty diagram value $1$ and a disjoint circle factor $-A^2-A^{-2}$. Correct by the <writhe of a link diagram> and substitute $t=A^{-4}$. Relative to the <Jones polynomial> normalized to be $1$ on the <unknot>, this unreduced invariant has an additional factor $-(t^{1/2}+t^{-1/2})$. For a nonempty $l$-component <link>, its value at $t=1$ is $(-2)^l$.
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