Genus-one Birkhoff sections for geodesic flows

DEHORNOY, PIERRE

In: Ergodic Theory and Dynamical Systems, 2015, vol. 35, no. 6, p. 1795-1813

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    Summary
    We prove that the geodesic flow on the unit tangent bundle to every hyperbolic 2-orbifold that is a sphere with three or four singular points admits explicit genus-one Birkhoff sections, and we determine the associated first return maps