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Atoroidal surface bundles

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abstract

We show that there is a type-preserving homomorphism from the fundamental group of the figure-eight knot complement to the mapping class group of the thrice-punctured torus. As a corollary, we obtain infinitely many commensurability classes of purely pseudo-Anosov surface subgroups of mapping class groups of closed surfaces. This gives the first examples of compact atoroidal surface bundles over surfaces.

fields

math.GT 1

years

2025 1

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UNVERDICTED 1

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On fixed points of pseudo-Anosov maps

math.GT · 2025-09-09 · unverdicted · novelty 6.0

Authors supply an estimate for fixed points of pseudo-Anosov maps and prove that, under strong irreducibility, log of the count is coarsely the Teichmuller length, plus volume-homology inequalities for mapping tori.

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  • On fixed points of pseudo-Anosov maps math.GT · 2025-09-09 · unverdicted · none · ref 19 · internal anchor

    Authors supply an estimate for fixed points of pseudo-Anosov maps and prove that, under strong irreducibility, log of the count is coarsely the Teichmuller length, plus volume-homology inequalities for mapping tori.