Juschenko–Matte Bon–Monod–de la Salle, Theorem 6.4, for subgroups of H(ℤ) — amenable if and only if the action on ℝ is extensively amenable

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Juschenko–Matte Bon–Monod–de la Salle, Theorem 6.4, for subgroups of H(ℤ) — amenable if and only if the action on ℝ is extensively amenable · Prove2Me