Foliation adjunction inequality for taut foliations on four-manifolds

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Let M4M^4 be a four-manifold with a taut foliation F{\mathcal F}, and let JFJ_{\mathcal F} be an almost-complex structure induced by F{\mathcal F}. For an embedded surface SS in MM without sphere components, write χ(S)\chi(S) for its Euler characteristic, S⋅SS\cdot S for its self-intersection, and c1(JF)⋅Sc_1(J_{\mathcal F})\cdot S for the evaluation of the first Chern class on SS. Foliation adjunction conjecture. For every such surface SS, one has

χ(S)+S⋅S≤c1(JF)⋅S.\chi(S)+S\cdot S\leq c_1(J_{\mathcal F})\cdot S.

This would generalize P. Kronheimer's theorem for products N3×S1N^3\times {\mathbb S}^1, where the bound is obtained from a taut foliation on the closed irreducible three-manifold NN. The source presents this as a proposed generalization of that result; its resolution is not specified here.

References

Primary source

Alexandru Scorpan, “A quick survey of foliations on 4-manifolds”, arXiv:math/0302323 (2003).

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