The fully marked surface theorem

David Gabai Department of Mathematics, Princeton University, Princeton, New Jersey, U.S.A. Mehdi Yazdi Mathematical Institute, University of Oxford, United Kingdom

TBD mathscidoc:2203.43005

Acta Mathematica, 225, (2), 369-413, 2020.12
In his seminal 1976 paper, Bill Thurston observed that a closed leaf S of a codimension‑1 foliation on a compact 3‑manifold has Euler characteristic equal, up to sign, to the Euler class of the foliation evaluated on [S], the homology class represented by S. The main result of this paper is a converse for taut foliations: if the Euler class of a taut foliation F evaluated on [S] equals up to sign the Euler characteristic of S and the underlying manifold is hyperbolic, then there exists another taut foliation F′ such that S is homologous to a union of leaves and such that the plane field of F′ is homotopic to that of F. In particular, F and F′ have the same Euler class. In the same paper Thurston proved that taut foliations on closed hyperbolic 3‑manifolds have Euler class of norm at most one, and conjectured that, conversely, any integral cohomology class with norm equal to one is the Euler class of a taut foliation. This is the second of two papers that together give a negative answer to Thurston’s conjecture. In the first paper, counterexamples were constructed assuming the main result of this paper.
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@inproceedings{david2020the,
  title={The fully marked surface theorem},
  author={David Gabai, and Mehdi Yazdi},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20220310110139310027920},
  booktitle={Acta Mathematica},
  volume={225},
  number={2},
  pages={369-413},
  year={2020},
}
David Gabai, and Mehdi Yazdi. The fully marked surface theorem. 2020. Vol. 225. In Acta Mathematica. pp.369-413. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20220310110139310027920.
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