Lindenstrauss proved pointwise ergodic theorem for amenable groups using tempered folner sequence.
Is there a pointwise ergodic theorem for amenable semigroups such as $\mathbb{N}^2$?
Lindenstrauss proved pointwise ergodic theorem for amenable groups using tempered folner sequence.
Is there a pointwise ergodic theorem for amenable semigroups such as $\mathbb{N}^2$?
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