Yazdi's virtual Euler class one conjecture

Let MM be an oriented closed hyperbolic 33--manifold. An even integral lattice point is a class wH2(M;R)w\in H^2(M;{\mathbb R}) whose integral lattice coordinates are even; suppose that ww has dual Thurston norm 11. A finite cover is a covering M~M\tilde{M}\to M with finitely many sheets, and let w~\tilde{w} denote the pullback of ww to M~\tilde{M}. A transversely oriented taut foliation is a taut foliation equipped with a transverse orientation.

Yazdi's virtual Euler class one conjecture. For any even integral lattice point wH2(M;R)w\in H^2(M;{\mathbb R}) of dual Thurston norm 11, there exists some finite cover M~\tilde{M} of MM such that w~\tilde{w} is the real Euler class of some transversely oriented taut foliation on M~\tilde{M}.

This conjecture is a virtual version of Thurston's Euler class one conjecture, which the source says was disproved. The paper gives positive examples with first Betti number 22 or 33 and partial examples with first Betti number at least 44; the general statement remains unresolved.

Sources & referencesView supporting material

Primary source

Yi Liu, “A criterion for virtual Euler class one”, arXiv:2411.11492 (2024).

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