The adjunction inequality for the Rasmussen invariant in negative-definite four-manifolds

Let W=(#rCP2)B4W=(\#^r\overline{\mathbb{CP}^2})\setminus B^4 for some r0r\geq 0. Let LW=S3L\subset\partial W=S^3 be a link, and let ΣW\Sigma\subset W be a properly, smoothly embedded oriented surface with no closed components such that Σ=L\partial\Sigma=L. The notation [Σ][\Sigma], [Σ]|[\Sigma]|, and [Σ][Σ][\Sigma]\cdot[\Sigma] denotes the homology class of Σ\Sigma, its norm as used in the paper, and its self-intersection, respectively.

Adjunction conjecture for ss.

s(L)1χ(Σ)[Σ][Σ][Σ].s(L)\leq 1-\chi(\Sigma)-\left|[\Sigma]\right|-[\Sigma]\cdot[\Sigma].

This extends the Ozsváth–Szabó adjunction inequality for τ\tau and the paper's previously established null-homologous case to arbitrary properly embedded surfaces in punctured connected sums of negative complex projective planes. The supplied text does not indicate whether it has been resolved.

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Primary source

Ciprian Manolescu, Marco Marengon, Sucharit Sarkar and Michael Willis, “A generalization of Rasmussen's invariant, with applications to surfaces in some four-manifolds”, arXiv:1910.08195 (2022).

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