Integral Rasmussen invariant conjecture for Whitehead doubles of consecutive torus knots

Let T(a,b)T(a,b) denote the (a,b)(a,b)-torus knot, let W+(J,t)W_+(J,t) denote the positive tt-twisted Whitehead double of JJ, and let K\overline{K} denote the mirror of KK. For a knot, sZ(K)s^{\mathbb{Z}}(K) is the integral Rasmussen invariant recorded as the relevant ordered pair.

Consecutive-torus-knot conjecture. For every integer n2n\geq 2, if

K=W+(T(n,n+1),n21),K=W_+\bigl(T(n,n+1),n^2-1\bigr),

then

sZ(K)=(0,n).s^{\mathbb{Z}}(\overline{K})=(0,n).

This extends the preceding prime-parameter prediction from field coefficients to the integral invariant and to all integers n2n\geq2. The source gives no evidence that it has been proved or refuted.

Sources & referencesView supporting material

Primary source

Dirk Schuetz, “On an integral version of the Rasmussen invariant”, arXiv:2202.00445 (2022).

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